Pediatrics

Introduction

• Birth is the most dangerous journey of life.
• Approximately 10% of newborns require some assistance to begin breathing at birth, and about 1% need extensive resuscitation.
• The single most important and effective step of neonatal resuscitation is the establishment of adequate ventilation of the lungs.
• Resuscitation is carried out according to the NRP (Neonatal Resuscitation Program) 2020 algorithm.

Overview of the Algorithm

Rapid assessment (term? Tone? Breathing?) → Initial steps (warm, position, clear, dry, stimulate) → Evaluate breathing + heart rate → PPV if apnoeic or HR < 100 → Chest compressions if HR < 60 → Adrenaline if HR < 60 persists

Preparation & Anticipation

• Every delivery must have at least one person skilled in initiating resuscitation whose sole responsibility is the baby.
• Prepare a pre-warmed radiant warmer, warm linen, functioning self-inflating bag & masks (sizes 0 and 1), suction, oxygen source with blender, laryngoscope, ET tubes and a functioning clock.
• Identify antenatal / intrapartum risk factors — prematurity, meconium-stained liquor, fetal distress, multiple gestation, maternal fever, antepartum haemorrhage.
• Perform a pre-resuscitation team briefing and equipment check.

Initial Rapid Assessment (at Birth, Within Seconds)

Ask three questions: Term gestation? Good tone? Breathing or crying?

• If all three are yes → routine care with the mother (warmth, dry, skin-to-skin, delayed cord clamping ≥ 30–60 s).
• If any is NO → move the baby to a radiant warmer and begin the initial steps.

Initial Steps — the 'golden Minute'

The initial steps and, if needed, the start of ventilation must be completed within the first 60 seconds ('Golden Minute'):

• Provide warmth — place under a radiant warmer (preterm < 32 weeks: place in a polyethylene bag/wrap without drying, add a cap).
• Position the airway — slight extension ('sniffing' position); a shoulder roll may help.
• Clear the airway if needed — suction mouth before nose ('M before N') only if secretions obstruct or PPV is anticipated.
• Dry, stimulate, reposition — flick the soles / rub the back; remove wet linen.

Evaluation — Two Vital Signs

• After the initial steps, evaluate respirations and heart rate.
• Heart rate is the most important indicator of successful resuscitation; it is best assessed with ECG leads / auscultation (a pulse oximeter responds more slowly).

Positive Pressure Ventilation (PPV) — the Key Intervention

Indications for PPV: apnoea / gasping, OR a heart rate < 100/min despite the initial steps.

• Start PPV with a mask covering the nose & mouth (not the eyes/chin), at a rate of 40–60 breaths/min ('Breathe… two… three…').
• Start with 21% O2 (room air) for term and 21–30% for preterm, titrated to the target pre-ductal SpO2.
• The best sign of effective PPV is a rising heart rate (also chest rise and improving colour).

If the HR does not rise or the chest does not move, apply the MR SOPA corrective steps in sequence:

Target Pre-ductal Spo2 (right Hand)

Chest Compressions

• Indicated if HR < 60/min despite 30 seconds of effective PPV (ideally after an alternative airway is placed and O2 increased to 100%).
• Technique: two-thumb encircling technique (preferred) over the lower third of the sternum; depth ≈ one-third of the AP chest diameter.
• Coordinate with PPV in a 3:1 ratio → 90 compressions + 30 breaths = 120 events/min. Rhythm cue: 'One-and-Two-and-Three-and-Breathe-and'.
• Reassess HR every 60 seconds.

Medications

Rarely needed if ventilation is effective. Indicated if the HR remains < 60/min despite effective PPV and 60 s of coordinated compressions:

• Adrenaline (epinephrine) 1:10,000 — IV/UVC preferred: 0.01–0.03 mg/kg (0.1–0.3 mL/kg); ET route (0.05–0.1 mg/kg) only while access is being secured. Repeat every 3–5 min.
• Volume expansion — Normal saline / Ringer lactate 10 mL/kg over 5–10 min, or O-negative blood, if hypovolaemia / blood loss is suspected and there is no response.
• Sodium bicarbonate and naloxone are not recommended during acute resuscitation.

Apgar Score — for Documentation, Not to Guide Resuscitation

• Recorded at 1 and 5 minutes (and every 5 min up to 20 min if low).
• Resuscitation is guided by respirations and heart rate and is never delayed to assign an Apgar score.

Post-resuscitation Care

• Monitor temperature, glucose, oxygenation and perfusion; shift to the NICU.
• Consider therapeutic hypothermia for moderate–severe HIE in term/late-preterm babies (start within 6 hours of birth).
• Watch for post-asphyxial multi-organ complications (renal, cardiac, metabolic).
• Communicate with and support the parents; document events accurately.

When to Stop / When Not to Start

• If the heart rate remains undetectable after 20 minutes of adequate, effective resuscitation, discontinuation may be reasonable after team and family discussion.
• Non-initiation may be considered for confirmed extreme prematurity or lethal anomalies, per local ethical guidelines.

Definition

• Neonatal jaundice (icterus neonatorum) is the yellowish discolouration of the skin, sclera and mucous membranes due to accumulation of bilirubin.
• It is clinically visible when the serum bilirubin exceeds 5 mg/dL in a newborn, and is the most common condition requiring evaluation in the newborn period.
• About 60% of term and 80% of preterm babies develop visible jaundice.

Kramer's Rule (clinical Estimation of Severity)

Jaundice progresses cephalo-caudally (head to toe); the area involved roughly estimates the bilirubin level:

Causes BY Time of Onset

< 24 hours (always pathological): Rh incompatibility, ABO incompatibility, G6PD deficiency, hereditary spherocytosis, concealed haemorrhage, congenital (torch) infections.

24–72 hours: physiological jaundice (commonest), sepsis, polycythaemia, cephalhaematoma / bruising, breastfeeding-failure jaundice.

> 72 hours – 2 weeks: sepsis, neonatal hepatitis, breast-milk jaundice, ongoing haemolysis, extravasated blood.

Prolonged (> 2 weeks):

• Unconjugated — breast-milk jaundice, hypothyroidism, ongoing haemolysis, Crigler-Najjar syndrome.
• Conjugated — biliary atresia (surgical emergency — needs Kasai portoenterostomy by 8 weeks), neonatal hepatitis, choledochal cyst, galactosaemia, torch, sepsis.

Clinical Evaluation

• History — onset, gestation, feeding adequacy, maternal blood group, family history of haemolysis, sibling jaundice.
• Examine — degree (Kramer zone), pallor, plethora, hepatosplenomegaly, cephalhaematoma, signs of sepsis and of bilirubin encephalopathy.
• Assess hydration and weight loss.

Investigations

• Total & direct serum bilirubin (TcB for screening).
• Blood group & Rh (baby & mother); Direct Coombs test (DCT).
• CBC, reticulocyte count, peripheral smear.
• G6PD assay; sepsis screen if indicated; TSH; and LFT / urine reducing substances if conjugated.

Management

Decisions are plotted on the Bhutani nomogram / AAP or NICE charts against age in hours, gestation and risk factors.

1. Phototherapy — first-line for unconjugated hyperbilirubinaemia:

• Blue-green light (460–490 nm) converts bilirubin into water-soluble, excretable isomers by photoisomerisation & structural isomerisation (lumirubin).
• Expose maximum skin, cover the eyes with pads and cover the genitalia; maintain hydration and monitor temperature.
• Side-effects: loose stools, rash, hyperthermia, dehydration, and bronze baby syndrome (with conjugated hyperbilirubinaemia — a relative contraindication).

2. Exchange transfusion — for very high or rapidly rising levels / signs of encephalopathy / failed phototherapy:

• Removes bilirubin, antibody-coated red cells and circulating antibody; a double-volume exchange (≈ 2 × 80 mL/kg ≈ 160 mL/kg) replaces ~85% of the blood volume.
• Use fresh, irradiated, cross-matched blood; monitor for hypocalcaemia, hypoglycaemia, thrombocytopenia, sepsis, apnoea and arrhythmia.

3. IVIG — in isoimmune haemolytic disease (Rh/ABO) to reduce the need for exchange transfusion. 4. Treat the cause — sepsis, hypothyroidism, and surgery for biliary atresia.

Complication — Kernicterus (bilirubin Encephalopathy)

Unconjugated (lipid-soluble) bilirubin crosses the blood-brain barrier and deposits in the basal ganglia, hippocampus and brainstem nuclei.

• Acute (ABE): lethargy, poor feeding, hypotonia → hypertonia, retrocollis-opisthotonus, high-pitched cry, seizures.
• Chronic (kernicterus): choreoathetoid cerebral palsy, sensorineural hearing loss, upward-gaze palsy, dental enamel dysplasia.

Definition

• Neonatal sepsis is a clinical syndrome of systemic illness with bacteraemia occurring in the first 28 days of life, characterised by signs and symptoms of infection with or without a positive blood culture.
• It is a leading cause of neonatal mortality in India, contributing to a large share of preventable newborn deaths.

WHY the Newborn Is Susceptible (pathogenesis)

The neonate — especially the preterm — has an immature immune system and vulnerable barriers:

• Immature innate immunity — reduced neutrophil reserve, impaired chemotaxis and phagocytosis, low complement levels.
• Immature adaptive immunity — low IgG (transplacental IgG mainly transferred in the 3rd trimester → preterm deficient), and IgM & IgA do not cross the placenta, so the newborn cannot fight Gram-negative organisms well.
• Vulnerable barriers — thin skin, the umbilical stump as a portal of entry, and an immature gut mucosa.
• Once organisms invade, a cytokine cascade (TNF-α, IL-1, IL-6) drives the systemic inflammatory response, shock and DIC.

Routes of Infection

• Transplacental (haematogenous) — e.g. Listeria, torch agents.
• Ascending / intrapartum — from the birth canal after rupture of membranes (early-onset).
• Postnatal / nosocomial — from the environment, hands, equipment and invasive lines (late-onset).

Classification

Risk Factors

For early-onset (maternal):

• PROM > 18–24 hours; maternal fever / chorioamnionitis.
• Foul-smelling / meconium-stained liquor; maternal UTI or GBS colonisation.
• Prematurity and low birth weight; unclean or prolonged / instrumental delivery.
• More than 3 vaginal examinations in labour.

For late-onset (baby / environment):

• Prematurity / LBW; prolonged hospital stay; invasive lines & ventilation.
• Poor hand hygiene, overcrowding, prolonged antibiotics, lack of breastfeeding.

Clinical Features

Signs are non-specific and subtle — 'the baby is not doing well'. A high index of suspicion is vital.

• General: lethargy, refusal to feed, poor cry, temperature instability (fever OR hypothermia).
• Respiratory: tachypnoea, grunting, retractions, apnoea, cyanosis.
• CVS: tachycardia, poor perfusion, prolonged CRT, shock, sclerema.
• GIT: vomiting, abdominal distension, diarrhoea, poor feeding, hepatosplenomegaly.
• CNS: lethargy, irritability, seizures, bulging fontanelle, high-pitched cry (meningitis).
• Others: jaundice, bleeding / DIC, petechiae, hypo/hyperglycaemia.

Investigations

Definitive:

• Blood culture — the gold standard (before starting antibiotics; ≥ 1 mL blood).
• Lumbar puncture / CSF study — mandatory in late-onset / positive culture / neurological signs.
• Urine culture (suprapubic / catheter) in late-onset sepsis.

Sepsis screen (supportive; ≥ 2 positive = probable sepsis):

• Total leukocyte count (< 5000 or high); Absolute Neutrophil Count (neutropenia is ominous).
• Immature-to-Total neutrophil (I:T) ratio ≥ 0.2.
• C-reactive protein (CRP) elevated; micro-ESR > 15 mm in the 1st hour.
• Others: procalcitonin, thrombocytopenia, toxic granules, chest X-ray if respiratory.

Management — Supportive Care (equally Important)

• Maintain temperature (warmth), oxygenation, and perfusion (fluid boluses / inotropes for septic shock).
• Maintain euglycaemia; correct electrolyte, acid-base and coagulation abnormalities (FFP/platelets for DIC).
• Continue breast / expressed milk feeds if tolerated; IV fluids if not; nurse in a thermoneutral environment.

Management — Antibiotics (start Empirically After Cultures; Do Not Wait)

• First-line (community EOS): Ampicillin + Gentamicin (add Cefotaxime if meningitis).
• Nosocomial LOS: as per the unit antibiogram — e.g. Piperacillin-tazobactam / Vancomycin + Amikacin, or Meropenem for resistant Gram-negatives; antifungal (fluconazole/amphotericin) if Candida.
• Duration: 7–10 days for sepsis, 14–21 days for meningitis; de-escalate as per culture & sensitivity.
• Adjuncts: IVIG in selected cases; exchange transfusion for sclerema / DIC (not routine).

Complications

• Septic shock and multi-organ dysfunction; DIC and bleeding.
• Meningitis and its sequelae — hydrocephalus, seizures, deafness, developmental delay.
• Pneumonia, necrotising enterocolitis, osteomyelitis / septic arthritis, endocarditis.

Prognosis

Mortality is high, especially in preterm babies, Gram-negative sepsis and meningitis. Early recognition and prompt antibiotics dramatically improve survival. Meningitis survivors need long-term neurodevelopmental and hearing follow-up.

Prevention

• Clean delivery practices (WHO '5 cleans'); asepsis and strict hand hygiene in the nursery.
• Early exclusive breastfeeding; KMC; minimise invasive procedures and rationalise antibiotics.
• Intrapartum antibiotic prophylaxis for GBS-colonised mothers; good antenatal care; antenatal steroids to reduce prematurity morbidity.

Definition

• Respiratory distress in a newborn is the presence of at least two of the following three signs: respiratory rate > 60/min (tachypnoea), chest retractions, and grunting.
• Its severity is graded by the Silverman-Andersen score.

Silverman-andersen Scoring

Five parameters, each scored 0–2 (total 0–10). Higher score = worse distress (the opposite of Apgar).

Causes of Respiratory Distress

Pulmonary: hyaline membrane disease (RDS), transient tachypnoea of the newborn (TTN), meconium aspiration syndrome (MAS), pneumonia, pneumothorax, pulmonary haemorrhage, congenital malformations (CDH, TEF).

Non-pulmonary: congenital heart disease, sepsis, metabolic acidosis, hypoglycaemia, anaemia / polycythaemia, hypothermia, and CNS causes.

Hyaline Membrane Disease (RDS) — Definition

• HMD is respiratory distress in a preterm neonate due to deficiency of pulmonary surfactant, causing widespread alveolar collapse (atelectasis).
• It is the commonest cause of respiratory distress in preterm babies.

Pathophysiology

Surfactant deficiency → ↑ Alveolar surface tension → Progressive atelectasis → ↓ Lung compliance + V/Q mismatch → Hypoxia + hypercapnia + acidosis → Pulmonary vasoconstriction → ↓ pulmonary blood flow → Ischaemic injury → protein-rich exudate → hyaline membranes

Risk Factors

• Prematurity (the major factor — risk ↑ with decreasing gestation).
• Infant of a diabetic mother (insulin antagonises surfactant maturation).
• Male sex, second twin, elective caesarean without labour, perinatal asphyxia, hypothermia.
• Protective: antenatal steroids, chronic intrauterine stress, PROM, IUGR.

Clinical Features

• Onset within minutes to hours of birth, worsening over the first 48–72 hours (then improving as endogenous surfactant appears).
• Tachypnoea, grunting, retractions, nasal flaring, cyanosis.
• Reduced air entry; may progress to respiratory failure and apnoea.

Investigations

• Chest X-ray (classic): low lung volumes, a fine reticulogranular 'ground-glass' pattern with air bronchograms; severe disease → 'white-out' lungs.
• ABG — hypoxaemia, hypercapnia, respiratory + metabolic acidosis.
• Sepsis screen (to exclude pneumonia), blood glucose, and echocardiography if PDA/PPHN suspected.

Differential Diagnosis (high-yield Comparison)

Management — Supportive

• Neutral thermal environment; IV fluids; maintain glucose & perfusion; minimal handling.
• Monitor continuously — SpO2 (target 90–95%), heart rate, ABG, blood pressure.

Management — Respiratory Support

• Early CPAP (nasal CPAP 5–6 cmH2O) — first-line; maintains functional residual capacity and prevents collapse.
• Mechanical ventilation if CPAP fails / severe apnoea / respiratory failure.
• Surfactant replacement via ET tube — INSURE (Intubate-Surfactant-Extubate to CPAP) or LISA (less-invasive surfactant administration); give early ('rescue') for established RDS.

Others: antibiotics until sepsis is excluded; caffeine for apnoea of prematurity; treat a haemodynamically significant PDA.

Complications of RDS / its Therapy

• Air leaks — pneumothorax, pneumomediastinum, pulmonary interstitial emphysema.
• Bronchopulmonary dysplasia (BPD) — chronic lung disease (O2 dependence at 36 weeks corrected age).
• Patent ductus arteriosus; intraventricular haemorrhage; retinopathy of prematurity.
• Complications of mechanical ventilation and oxygen toxicity.

Prevention

• Antenatal corticosteroids — betamethasone / dexamethasone to the mother at 24–34 weeks when preterm delivery is anticipated (most effective if given > 24 h and < 7 days before delivery).
• Prevent prematurity; prevent birth asphyxia and hypothermia; optimise diabetic control in pregnancy.

WHY Surfactant Is Everything

• The whole of hyaline membrane disease turns on understanding why a lung without surfactant cannot stay open.
• Surfactant is a phospholipid produced by the type II pneumocytes from about 24 weeks, in adequate amounts only after 34–35 weeks.
• Its function is to reduce the surface tension at the air-liquid interface of the alveolus.
• Without it, Laplace's law takes over: the pressure needed to keep an alveolus open is inversely proportional to its radius — so small alveoli require more pressure than large ones, and therefore collapse, emptying into the larger ones.
• The result in the preterm lung is widespread alveolar collapse (atelectasis) at the end of every expiration — so the baby must generate enormous pressures to re-inflate the lung with every breath.
• Hence the clinical picture: tachypnoea, grunting (an attempt to generate auto-PEEP by expiring against a closed glottis — a highly efficient natural manoeuvre), intercostal and subcostal retractions, nasal flaring and cyanosis, worsening over the first hours, with the classic reticulogranular 'ground-glass' X-ray with air bronchograms.
• It also explains the treatment: replace the surfactant, and provide CPAP to hold the alveoli open.

WHY Antenatal Steroids Are the Greatest Intervention

• The most important fact about RDS is understanding why the single greatest advance was not a treatment given to the baby, but an injection given to the mother.
• Giving antenatal corticosteroids (betamethasone or dexamethasone) to a woman in threatened preterm labour, between 24 and 34 weeks, accelerates fetal lung maturation — inducing the type II pneumocytes to produce surfactant.
• The effect is dramatic and is one of the best-established interventions in all of medicine: it reduces respiratory distress syndrome, intraventricular haemorrhage, necrotising enterocolitis and — most importantly — neonatal mortality.
• And it is cheap, safe and available anywhere.
• The benefit begins within 24 hours and is maximal after 48.
• Understanding this explains why every woman in threatened preterm labour must receive steroids — and why this is a public-health intervention as much as an obstetric one.
• For the baby who is nevertheless born with RDS, the treatment is early CPAP (which splints the alveoli open and often avoids intubation altogether), exogenous surfactant given via the endotracheal tube, oxygen titrated carefully (to avoid retinopathy), warmth, nutrition and the treatment of sepsis.

Definition

• Perinatal asphyxia is an insult to the fetus / newborn due to lack of oxygen (hypoxia) and/or lack of perfusion (ischaemia) to various organs.
• The WHO defines birth asphyxia as failure to initiate and sustain breathing at birth.
• The National Neonatology Forum (NNF) defines it as an Apgar score ≤ 6 at 1 minute (or slow / absent gasping requiring resuscitation).
• HIE is the neurological syndrome resulting from asphyxia.

Etiology

Antepartum (~20%): maternal hypotension / hypertension, pre-eclampsia, diabetes, APH, IUGR, post-maturity.

Intrapartum (~70% — commonest): cord prolapse / compression, abruptio placentae, prolonged / obstructed labour, uterine rupture, difficult instrumental delivery, tight nuchal cord.

Postpartum (~10%): severe RDS, cyanotic heart disease, recurrent apnoea, severe anaemia, shock.

Pathophysiology — the Two Phases of Injury

• Primary energy failure: hypoxia-ischaemia → anaerobic metabolism → ↓ ATP → failure of the Na/K pump → cytotoxic oedema and immediate necrosis.
• Reperfusion / secondary energy failure (6–48 h later): excitotoxicity (glutamate release), calcium influx, free-radical injury, and apoptosis. This delayed phase is the therapeutic window targeted by cooling.

Sarnat & Sarnat Staging of Hie

Multi-organ Involvement ('asphyxia Is a Multi-organ Disease')

• CNS: HIE, seizures, cerebral oedema.
• Renal: acute tubular necrosis, oliguria (the commonest organ affected).
• CVS: myocardial dysfunction, hypotension, tricuspid regurgitation.
• Lungs: PPHN, pulmonary haemorrhage, RDS / MAS.
• GIT: necrotising enterocolitis, feed intolerance.
• Metabolic / Haem: hypoglycaemia, hypocalcaemia, metabolic acidosis, DIC, SIADH.

Investigations

• Cord / arterial blood gas (pH, base deficit); blood glucose, calcium, electrolytes.
• Renal & liver function; coagulation profile.
• Cranial ultrasound / MRI (MRI best for prognosis — basal ganglia / thalamic and watershed injury).
• EEG / amplitude-integrated EEG (aEEG) — for subclinical seizures and prognostication.

Management — 1. Resuscitation

Prompt, effective resuscitation at birth (per NRP) to restore ventilation and perfusion and prevent ongoing hypoxic injury.

Management — 2. Supportive Care (the 'golden NS')

• Normal ventilation / oxygenation — avoid both hypoxia and hyperoxia; avoid hyperventilation (hypocapnia reduces cerebral flow).
• Normal perfusion / BP — treat hypotension with fluids / inotropes; avoid fluid overload.
• Normoglycaemia; normal electrolytes / calcium.
• Control seizures — first-line Phenobarbitone 20 mg/kg IV loading (repeat 10 mg/kg up to 40 mg/kg); second-line phenytoin / levetiracetam / midazolam.
• Restrict fluids (~2/3 maintenance) if renal failure / SIADH; monitor urine output and daily weight.

Management — 3. Therapeutic Hypothermia (key Neuroprotection)

• For moderate-to-severe HIE in babies ≥ 36 weeks, started within 6 hours of birth.
• Cool to a core temperature of 33–34 °C for 72 hours, then rewarm slowly (0.5 °C/hour).
• Proven to reduce death and major neurodevelopmental disability; requires monitoring facilities.

Prognostic Indicators (poor Outcome)

• Sarnat stage 3 (severe HIE); prolonged, refractory seizures.
• Persistently abnormal aEEG/EEG; abnormal MRI (basal ganglia / thalamic injury).
• Apgar 0–3 beyond 10 minutes; failure to establish spontaneous respiration by 20–30 minutes.
• Multi-organ failure and persistent metabolic acidosis.

Complications / Sequelae

• Cerebral palsy (spastic quadriplegia / dyskinetic), epilepsy, intellectual disability.
• Microcephaly, sensorineural hearing loss, visual impairment, learning / behavioural problems.

Prevention & Follow-up

• Good antenatal & intrapartum care, partograph use, and fetal monitoring; timely caesarean for fetal distress.
• Skilled birth attendance and readiness for resuscitation at every delivery.
• Structured neurodevelopmental follow-up of survivors (development, hearing, vision) for early intervention.

The latent window between the two phases is when cooling works.

WHY Apgar Does Not Diagnose Asphyxia

• A common and important misconception is understanding why a low Apgar score does not, by itself, mean birth asphyxia — and why it must never be used as the sole basis of that diagnosis (a matter with medico-legal as well as clinical importance).
• The Apgar score was designed to describe the baby's condition and the response to resuscitation — not to diagnose the cause, nor to predict outcome.
• It can be low for many reasons that have nothing to do with hypoxia: prematurity, maternal sedation or anaesthesia, congenital neuromuscular disease, infection, or a congenital malformation.
• Conversely, most babies with a low Apgar at one minute recover completely.
• The diagnosis of significant perinatal asphyxia requires objective evidence of an intrapartum hypoxic-ischaemic insult: a profound metabolic acidosis in cord/early arterial blood (pH <7.0 with a base deficit ≥12), a persistently low Apgar (≤5 at 5 AND 10 minutes), the development of neonatal ENCEPHALOPATHY (Sarnat staging), and evidence of MULTI-ORGAN dysfunction (renal, cardiac, hepatic, haematological) — together with a sentinel event.
• All four elements are needed.

Definition

• Growth is the progressive increase in the size of the body and its parts (a quantitative change), whereas development refers to maturation of functions and acquisition of skills (a qualitative change).
• Growth is one of the most sensitive indicators of a child's health and nutritional status, which is why growth monitoring is central to child health care.

Factors Affecting Growth

• Genetic — parental height/build, sex, ethnicity; determines the growth potential.
• Nutritional — the single most important postnatal factor.
• Hormonal — growth hormone, thyroxine, insulin, and sex steroids (at puberty).
• Antenatal / intrauterine — maternal nutrition & health, placental function, intrauterine infections.
• Chronic illness — cardiac, renal, GIT, respiratory disease impair growth.
• Socio-economic & emotional — poverty, deprivation and neglect retard growth (psychosocial dwarfism).

Laws / Patterns of Growth

• Growth is a continuous but not uniform process — rapid in infancy, slower in childhood, and accelerating again at puberty (the adolescent growth spurt).
• Different tissues grow at different rates (Scammon curves): neural tissue grows earliest, lymphoid tissue overshoots then regresses, general/somatic tissue is sigmoid, and genital tissue grows late.
• Growth proceeds in a cephalo-caudal (head to toe) and proximo-distal (centre to periphery) direction.
• Catch-up growth — after a growth-limiting illness is corrected, a child grows faster than normal to return to its original growth curve.

Parameters of Growth — Weight

Weight is the most sensitive index of recent nutrition and health:

• Average birth weight ≈ 3 kg (India ~2.8–3 kg).
• Physiological weight loss up to 10% in the first week, regained by 7–10 days.
• Doubles by 5 months, triples by 1 year, quadruples by 2 years.
• At 3 years ≈ 5× birth weight; at 5 years ≈ 6× birth weight.

Parameters — Length / Height

Length/height is a better index of chronic/long-standing nutrition (measured lying down < 2 years; standing ≥ 2 years):

• Average birth length ≈ 50 cm.
• Gains: 1st year ~25 cm (→ 75 cm), 2nd year ~12 cm (→ 87–90 cm), 3rd year ~9 cm, then ~6–7 cm/year till puberty.
• Doubles birth length (~100 cm) by 4 years.
• At 2 years, height ≈ half the eventual adult height.

Parameters — Head Circumference (HC / Ofc)

Reflects brain growth; measured as the maximum occipito-frontal circumference:

Increment: ~2 cm/month (0–3 mo), ~1 cm/month (3–6 mo), ~0.5 cm/month (6–12 mo).

Body Proportions — Us:ls Ratio

The upper-segment : lower-segment ratio (lower segment = top of pubic symphysis to floor) assesses proportion:

A high ratio suggests short limbs (achondroplasia, untreated hypothyroidism, rickets); a low ratio suggests a short trunk (spinal dysplasia).

Fontanelles & Dentition

• Anterior fontanelle: diamond-shaped, ~2.5 cm at birth, closes by 9–18 months.
• Posterior fontanelle: closes by 6–8 weeks.
• Temporary teeth: eruption begins ~6–7 months (lower central incisors first); ~6–8 teeth by 1 year; all 20 by ~2.5–3 years. Rough rule: number of teeth ≈ age in months − 6.
• Delayed dentition (no teeth by 13 months): rickets, hypothyroidism, hypoparathyroidism, Down syndrome, malnutrition, familial.

Assessment of Growth — Anthropometry

• Weight-for-age — underweight (acute + chronic).
• Height/Length-for-age — stunting (chronic undernutrition).
• Weight-for-height — wasting (acute undernutrition) and overweight.
• BMI-for-age — overweight / obesity / thinness in older children.
• MUAC — quick screen (1–5 yr): < 11.5 cm = severe, 11.5–12.5 cm = moderate acute malnutrition.
• Head circumference and skinfold thickness (body fat).

Growth Charts

• Serial measurements are plotted on growth charts — the trend/velocity is far more informative than a single reading.
• WHO Standards (2006) for 0–5 years; IAP charts for 5–18 years.
• The MCP (Mother & Child Protection) card in India uses WHO standards.
• A curve that flattens, falls, or crosses centile lines downward = growth faltering requiring evaluation.

Definition

• Development is the progressive acquisition of skills and maturation of function (a qualitative change).
• A developmental milestone is a skill that most normal children achieve by a certain age.
• Development is assessed across four domains and reflects maturation of the nervous system.

Principles / Laws of Development

• Development is a continuous process from conception to maturity.
• It follows a definite sequence (cephalo-caudal & proximo-distal — head control before sitting, sitting before walking).
• It progresses from generalised (mass) to specific responses (whole-hand grasp → fine pincer grasp).
• Primitive reflexes must disappear before the corresponding voluntary skill appears.
• The rate varies between children, but the sequence is constant.

The Four Domains

• Gross motor — posture and large-muscle movement.
• Fine motor & vision — hand skills and manipulation.
• Language & hearing — speech and comprehension.
• Personal-social / adaptive — self-help and interaction.

A. Gross Motor Milestones

B. Fine Motor & Vision

C. Language & Hearing

D. Personal-social / Adaptive

WHY You Must Correct for Prematurity

• A practical rule that prevents needless alarm is understanding why a premature baby's development must be judged against their corrected age, not their chronological age — and for how long.
• Development is a function of the maturation of the nervous system, which begins at conception, not at birth.
• A baby born at 28 weeks has, at 6 months of chronological age, a nervous system that is only as mature as that of a term baby of 3 months — because they were born 3 months early.
• To expect them to sit, or to smile, at the same chronological age as a term baby is to set them an impossible standard — and to label a normally-developing preterm child as 'delayed', causing enormous and unnecessary parental distress.
• Hence: corrected age = chronological age minus the number of weeks born before 40 weeks — and it is used to assess development (and growth) until about 2 years, by which time the difference becomes negligible.
• Two further principles: development proceeds cephalocaudally (head control before sitting before walking) and from proximal to distal and general to specific (a whole-hand grasp before a pincer grip); and primitive reflexes must disappear before voluntary skills can emerge.

Definition

Short stature is a height below the 3rd percentile (or below −2 SD) for age and sex, OR a height velocity below the 25th percentile sustained over ≥ 6–12 months, OR a height significantly below the genetic (mid-parental) target.

B. Proportionate Pathological Short Stature

• Undernutrition — the commonest cause worldwide.
• Chronic systemic disease — CKD, congenital heart disease, chronic liver disease, malabsorption (coeliac disease), IBD, chronic infections (TB), poorly controlled asthma, chronic anaemia.
• Endocrine — growth hormone (GH) deficiency, hypothyroidism, Cushing syndrome, poorly controlled diabetes, precocious puberty.
• IUGR / small-for-gestational-age with failure of catch-up.
• Psychosocial (deprivation) dwarfism.

C. Disproportionate Short Stature (abnormal Us:ls Ratio)

• Skeletal dysplasias — achondroplasia (short limbs, high US:LS), spondyloepiphyseal dysplasia (short trunk).
• Rickets and other metabolic bone diseases.

D. Genetic / Syndromic

• Turner syndrome (screen every short girl with a karyotype — webbed neck, cubitus valgus, widely spaced nipples, delayed puberty).
• Down syndrome, Noonan syndrome, Prader-Willi syndrome, Russell-Silver syndrome.

Clinical Evaluation — History

• Birth weight/length, antenatal & perinatal events (IUGR, asphyxia).
• Growth records, age of onset of faltering, height velocity.
• Dietary history; chronic symptoms (diarrhoea, cough, polyuria); drug history (steroids).
• Parental heights & pubertal timing; consanguinity; developmental history.

Clinical Evaluation — Examination

• Accurate anthropometry (height, weight, arm span, US:LS, sitting height) plotted on charts.
• Calculate mid-parental height and height velocity.
• Dysmorphic features, goitre, signs of systemic disease, pubertal (Tanner) staging, fundus & visual fields (for a pituitary tumour).

Investigations (stepwise)

First-line screen:

• CBC, ESR; renal & liver function; venous blood gas / electrolytes.
• Thyroid function (TSH, T4); coeliac serology (anti-tTG).
• Bone age (X-ray left hand & wrist); urine routine / microscopy.
• Karyotype in every short girl (to exclude Turner syndrome).

Second-line (if screen normal / GH deficiency suspected):

• IGF-1 & IGFBP-3; GH stimulation (provocation) tests (clonidine, insulin, glucagon).
• MRI brain/pituitary if GH deficiency is confirmed (to exclude craniopharyngioma).
• Serum cortisol / overnight dexamethasone suppression if Cushing is suspected.

Management

• Treat the underlying cause — nutrition, gluten-free diet for coeliac, thyroxine for hypothyroidism, treat systemic disease.
• Recombinant human GH — for proven GH deficiency, Turner syndrome, chronic renal failure, Prader-Willi, and SGA without catch-up.
• Constitutional delay — usually reassurance; a short course of sex steroids in selected distressed adolescents.
• Psychological support; monitor the growth velocity on therapy.

Definition

• Developmental delay is a significant lag (usually > 2 SD below the mean, or DQ < 70) in achieving milestones in one or more developmental domains.
• Global Developmental Delay (GDD) denotes delay in ≥ 2 of the four domains in a child under 5 years.
• Beyond 5 years, once cognition can be formally tested, the term intellectual disability is used.

Patterns of Delay (a Clue to Aetiology)

Causes — Prenatal (commonest)

• Chromosomal — Down syndrome, fragile-X syndrome, microdeletions.
• Genetic / metabolic — inborn errors of metabolism; neurocutaneous syndromes.
• Structural — neural tube defects, cerebral malformations, congenital hydrocephalus.
• Congenital infections (torch); teratogens (alcohol — fetal alcohol syndrome); maternal illness.

Causes — Perinatal

• Birth asphyxia / HIE; prematurity with intraventricular haemorrhage.
• Kernicterus; symptomatic hypoglycaemia; neonatal meningitis / sepsis.

Causes — Postnatal

• CNS infections (meningitis, encephalitis); head trauma; hypoxic insults (near-drowning).
• Hypothyroidism; severe undernutrition; iron deficiency; lead poisoning.
• Severe psychosocial deprivation / neglect; uncontrolled epilepsy.

Clinical Evaluation — History

• Antenatal — infections, drugs / alcohol, maternal illness.
• Perinatal — asphyxia, prematurity, jaundice, NICU stay.
• Developmental history — age of attainment of milestones and any regression.
• Nutrition, immunisation, seizures; family history & consanguinity; prior sibling deaths.

Clinical Evaluation — Examination

• Anthropometry including head circumference (micro- / macrocephaly).
• Dysmorphology — facies, ears, palate, hands, genitalia.
• Skin (neurocutaneous markers) — café-au-lait macules, ash-leaf spots, port-wine stain.
• Full neurological exam — tone, power, deep reflexes, persistence of primitive reflexes, posture, gait.
• Vision & hearing; organomegaly (storage disorders); cardiac exam; eye (cataract, cherry-red spot, KF ring).

Common Specific Conditions to Recognise

Investigations (targeted BY Clues)

• Vision & hearing (BERA) in every child — especially with speech delay.
• Thyroid function; CBC; and a metabolic screen (blood gas, ammonia, lactate, urine metabolic screen) if regression / consanguinity.
• Karyotype / chromosomal microarray; Fragile-X testing; targeted genetic & metabolic tests.
• Neuroimaging (MRI brain) for microcephaly, focal deficits, regression or seizures.
• EEG if seizures are suspected; serum creatine kinase for isolated motor delay (muscular dystrophy).

Management (multidisciplinary)

• Treat the treatable — thyroxine for hypothyroidism, correct hearing/vision, nutrition, treat seizures & infections.
• Early intervention & therapy — physiotherapy, occupational therapy, speech therapy, special education.
• Family counselling & support; genetic counselling; disability certification and rehabilitation services.
• Regular follow-up to monitor progress and detect associated problems (epilepsy, behaviour, contractures).

Prognosis

• Outcome depends on the cause, severity and timeliness of intervention.
• Treatable causes (hypothyroidism, hearing loss, nutritional) do well if corrected early; genetic/structural causes and those with regression carry a guarded prognosis.
• Early intervention during the period of maximal brain plasticity markedly improves functional outcomes.

WHY Regression Is Always Sinister

• The most important red flag in developmental assessment is understanding why the loss of a skill the child once possessed is fundamentally different from — and far more serious than — simply being slow to acquire it.
• A child with static developmental delay (from cerebral palsy, birth asphyxia, a chromosomal disorder, or intellectual disability) develops slowly — but they keep going forwards.
• They may sit late and walk late, but they do not UNSIT or UNWALK.
• The underlying insult is a fixed, non-progressive one.
• But a child who could sit and can no longer sit; who could speak and has stopped speaking; who could walk and now falls — has regression.
• And regression means that something is actively destroying the nervous system right now.
• The causes are a short and grave list: neurodegenerative disorders, inborn errors of metabolism (many of which are treatable if caught — which is why they must be sought urgently), brain tumours, hydrocephalus, subacute sclerosing panencephalitis (a late complication of measles — important in India), and severe epilepsy syndromes.
• Hence: regression demands urgent, thorough investigation — never reassurance.

WHY the Hearing Must Be Tested First

• A rule that transforms outcomes is understanding why every child with delayed speech must have their hearing tested — before anything else, and however unlikely deafness may seem.
• Language is learned by hearing it: a child who cannot hear cannot acquire speech, however normal their intelligence and however loving their family.
• Hearing loss is the commonest cause of isolated speech delay — and, crucially, it is invisible: the child looks entirely normal, responds to visual cues, and parents (and doctors) commonly conclude that they are simply 'a late talker' or 'stubborn' or 'lazy'.
• Meanwhile the critical period for language acquisition is passing.
• And this matters enormously, because the condition is treatable: a hearing aid or a cochlear implant, fitted early, allows normal language development — whereas a diagnosis made at four or five years leaves permanent language and educational impairment.
• Hence: universal newborn hearing screening where available; and, in any child with speech delay, a formal audiological assessment (BERA/OAE) — not merely a clapped hand behind the head, which the child will feel and see.
• Delay in speech may also indicate autism, intellectual disability, or a specific language disorder.

Definition

• Protein Energy Malnutrition (PEM) is a pathological state resulting from an inadequate intake or utilisation of protein and calories, occurring most commonly in children under 5 years.
• It represents a spectrum ranging from mild underweight to the severe clinical forms of marasmus, kwashiorkor and marasmic-kwashiorkor.
• It remains a major cause of childhood morbidity and mortality in India and underlies nearly half of all under-5 deaths.

Etiology

Primary (inadequate intake):

• Poverty, food insecurity, and maternal ignorance about correct feeding.
• Faulty / delayed weaning; prelacteal feeds; early cessation of breastfeeding; dilute or infrequent feeds.
• Large family size, high birth order and closely-spaced pregnancies; maternal illiteracy.

Secondary (increased demand / loss / poor utilisation):

• Recurrent infections — diarrhoea, measles, tuberculosis, HIV (the infection–malnutrition vicious cycle: infection worsens nutrition, and malnutrition impairs immunity).
• Malabsorption (coeliac disease, chronic diarrhoea), chronic systemic illness, malignancy.
• Increased losses (protein-losing enteropathy, nephrotic syndrome) and increased requirement (prematurity, congenital heart disease).

Pathophysiology (marasmus VS Kwashiorkor)

• Marasmus — a chronic deficiency of both calories and protein → the body adapts by mobilising fat and muscle for energy → severe wasting, but albumin and the liver are preserved (successful adaptation).
• Kwashiorkor — a relatively greater protein deficiency with some calorie intake → hypoalbuminaemia, reduced oncotic pressure and abnormal membrane permeability → oedema; impaired lipoprotein export → fatty liver (failure of adaptation).

Metabolic & Immunological Changes ('reductive Adaptation')

• Reduced basal metabolic rate and reduced organ function to conserve energy.
• Sodium-potassium pump dysfunction → intracellular sodium & water retained, potassium & magnesium depleted (total-body K low even with normal serum K).
• Impaired gluconeogenesis → prone to hypoglycaemia; poor thermogenesis → hypothermia.
• Depressed immunity — impaired cell-mediated immunity, low complement, poor neutrophil function → severe, atypical infections with masked signs (fever may be absent).

Classification

Clinical Features — Marasmus VS Kwashiorkor

Investigations

• Anthropometry (weight, height, MUAC) with grading; assess for pitting oedema.
• CBC (anaemia), blood glucose, serum electrolytes (K, Mg), serum albumin & total protein.
• Screen for infection — urine/blood culture, chest X-ray, Mantoux/HIV; stool examination.
• Assess associated micronutrient deficiencies — vitamin A, iron, zinc, folate.

Management

• Mild-to-moderate PEM — dietary counselling, energy-dense catch-up feeding, treat infections, deworming, micronutrients, and growth monitoring; usually managed at home / OPD.
• Severe (SAM) — follow the WHO 10-step protocol (stabilisation → rehabilitation); admit if complications (see the SAM answer).
• Continue breastfeeding; frequent energy-dense feeds; vitamin A, folate, zinc, potassium; iron only in the recovery phase.

Complications

• Hypoglycaemia, hypothermia, dehydration and electrolyte imbalance — the immediate killers.
• Overwhelming infection (the commonest cause of death) and septic shock.
• Vitamin A deficiency → xerophthalmia & blindness; severe anaemia; heart failure (from over-hydration/over-feeding).
• Impaired immunity, delayed growth, and long-term cognitive/developmental deficit.

Prevention

• Promote exclusive breastfeeding (0–6 months) and timely, adequate, hygienic complementary feeding.
• Immunisation, deworming, vitamin A prophylaxis and prompt treatment of infections.
• Growth monitoring; nutrition & health education; food-security & ICDS/Anganwadi programmes; birth spacing.

WHY Oedema Is the Dividing Line

• The classification of protein-energy malnutrition turns on understanding why one starving child develops oedema and another does not — and why this single sign changes the diagnosis, the treatment and the prognosis.
• In marasmus, the child has a severe deficit of total calories.
• The body responds adaptively and appropriately: it breaks down its own fat and then its muscle for fuel, and it down-regulates its metabolism to survive.
• The result is a child who is 'skin and bones' — grossly wasted, with an 'old man's face' from loss of the buccal fat pad, but with a preserved appetite and, crucially, a relatively intact metabolic and immune adaptation.
• In kwashiorkor, the deficit is chiefly of protein (often with adequate carbohydrate — a diet of rice or maize gruel).
• The adaptation fails: albumin synthesis falls (lowering the plasma oncotic pressure), free radicals accumulate unopposed (because the antioxidant systems, which require protein, are exhausted), cell membranes leak, and fluid escapes into the tissues — producing the defining bilateral pitting oedema.
• The child is apathetic, anorexic, with a flaky-paint rash, sparse pale hair and a fatty liver — and their mortality is substantially higher than that of the marasmic child.

WHY Malnutrition and Infection Feed Each Other

• The most important concept in understanding why malnourished children die is the vicious cycle between malnutrition and infection.
• Malnutrition impairs immunity profoundly — it causes atrophy of the thymus and lymphoid tissue, impairs cell-mediated immunity, reduces the integrity of the skin and gut mucosal barriers, and reduces the acute-phase response.
• So the malnourished child gets infected more often and more severely.
• And infection, in turn, worsens the malnutrition: it reduces appetite, increases metabolic demand, causes catabolism and nutrient loss (protein in diarrhoea, iron in hookworm) — and, in India, is compounded by the tragic practice of withholding food during illness.
• Each turn of the cycle drives the child further down.
• This has two crucial consequences.
• First, the immediate cause of death in a severely malnourished child is almost always an infection — which is why antibiotics are given to all children with SAM, whether or not they have signs of infection (and the signs, being inflammatory, are typically absent).
• Second, a child must be fed during illness, not starved — and diarrhoea must be treated without stopping feeds.

Definition & Diagnostic Criteria

Severe Acute Malnutrition (SAM) is diagnosed by any one of the following in a child 6–59 months:

• Weight-for-height/length < −3 SD (severe wasting), OR
• MUAC < 11.5 cm, OR
• Bilateral pitting pedal oedema (oedematous malnutrition).

Appetite Test & Triage

• The appetite test (offering RUTF) decides the route of care — a child who eats it has a preserved appetite.
• Uncomplicated SAM (good appetite, alert, no danger signs) → community-based management with Ready-to-Use Therapeutic Food (RUTF).
• Complicated SAM (poor appetite OR any danger sign) → inpatient (facility) care.

Danger Signs Requiring Inpatient Care

• Anorexia / failed appetite test; severe oedema (+++); lethargy or unconsciousness; convulsions.
• Hypothermia; high fever; severe dehydration/shock; severe anaemia; severe pneumonia/LRTI; persistent vomiting.

Principle — Two Phases

Stabilisation (days 1–7): steps 1–7 + start of 8 → transition → rehabilitation (weeks 2–6): catch-up growth → follow-UP

The 10 Steps of WHO Management

F-75 VS F-100 VS Rutf

Monitoring & Failure to Respond

• Monitor weight daily, oedema, temperature, feeds, stools and danger signs.
• Expected weight gain in rehabilitation ≈ 5–10 g/kg/day.
• Failure to respond → look for missed infection (TB, HIV, UTI), inadequate feeding, or micronutrient deficiency.

Criteria for Discharge / Recovery

• Good appetite, alert, oedema fully resolved, consistent weight gain.
• Weight-for-height ≥ −2 SD / MUAC ≥ 12.5 cm; immunisation completed; caregiver counselled on home feeding.

Prevention

• Exclusive breastfeeding, timely complementary feeding, immunisation, vitamin A & deworming.
• Community MUAC screening and early identification/referral (ICDS / Anganwadi).

Monitoring Response (weight Gain)

Complications During Treatment

• Refeeding syndrome — if feeding is too aggressive early → dangerous drops in phosphate, potassium & magnesium; hence cautious F-75 first.
• Heart failure — from over-hydration or too-rapid feeding/transfusion (the child has a small, compromised heart).
• Hypoglycaemia, hypothermia and overwhelming infection remain the main early killers.

Never give iron in the stabilisation phase — it worsens infection.

Definition

• Breastfeeding is the feeding of an infant with the mother's milk.
• Exclusive breastfeeding (only breast milk — no water or other food, except medicines/vitamins) is recommended for the first 6 months, with continued breastfeeding alongside complementary foods up to 2 years or beyond.

Physiology of Lactation — Hormones

• Prolactin (anterior pituitary) → the milk-secretion (production) reflex; surges with each suckling episode, more at night → 'the more the baby suckles, the more milk is made'.
• Oxytocin (posterior pituitary) → the 'let-down' / milk-ejection reflex, contracting myoepithelial cells; stimulated by suckling and by seeing/hearing the baby, but inhibited by pain, anxiety and stress.
• A local feedback inhibitor of lactation (FIL) in retained milk slows production — hence emptying the breast increases supply.

Infant Reflexes Involved

• Rooting reflex — turning to the stimulus and opening the mouth.
• Suckling reflex — rhythmic suckling when the nipple/areola touches the palate.
• Swallowing reflex — coordinated swallowing of milk.

Types / Stages of Milk

• Colostrum (days 1–4) — thick, yellow; rich in protein, vitamin A and secretory IgA; laxative (helps pass meconium). 'The baby's first immunisation'.
• Transitional milk (day 5–14) → mature milk thereafter.
• Foremilk (start of a feed) — watery, quenches thirst; hindmilk (end) — fat-rich, gives most calories & satiety.

Advantages

To the baby:

• Ideal, easily digested, balanced nutrition; promotes optimal growth & brain development (DHA).
• Anti-infective — IgA, lactoferrin, lysozyme, macrophages, bifidus factor → fewer diarrhoeal & respiratory infections.
• Reduces later obesity, type-1 diabetes, allergy & necrotising enterocolitis; always sterile and at the right temperature.

To the mother:

• Oxytocin promotes uterine involution & reduces postpartum haemorrhage.
• Lactational amenorrhoea gives natural birth spacing; reduces breast & ovarian cancer risk; aids weight loss and bonding.

To the family/society: economical, convenient, no preparation, and reduces child mortality & healthcare costs.

Contraindications

• Infant: galactosaemia (absolute); certain inborn errors of metabolism (special formula).
• Mother: untreated active TB (until non-infectious), active herpes lesion on the breast, cytotoxic/radioactive drugs, and maternal HIV (as per current national policy with ART).
• Most maternal illnesses and medications are not contraindications.

Correct Attachment & Positioning

• Signs of good attachment (calm): Chin touching breast, Areola more visible above than below, Lips flanged out, Mouth wide open.
• Baby well supported; head & body in a straight line, facing the breast, 'tummy-to-tummy'; the baby takes a large mouthful of areola, not just the nipple.

Expression & Storage of Breast Milk

• Milk can be expressed by hand or pump when the mother and baby are separated (work, prematurity, illness).
• Storage: room temperature ~6 hours, refrigerator ~24 hours; feed by cup (not bottle).

Common Problems & Management

Assessing Adequacy of Breast Milk

• Satisfactory weight gain along the growth chart — the most reliable sign.
• The baby passes urine ≥ 6 times a day (pale, dilute) and has soft stools.
• The baby is settled and satisfied after feeds and sleeps well between them.
• Audible swallowing during feeds; the breast softens after a feed.

Promotion

• Early initiation within 1 hour; rooming-in; no prelacteal feeds; avoid bottles/pacifiers.
• Support via the Baby Friendly Hospital Initiative (BFHI) and IYCF counselling; enforce the IMS Act.

Iycf Definitions (WHO)

• Exclusive breastfeeding — only breast milk (plus medicines/vitamins), nothing else, for 6 months.
• Predominant breastfeeding — breast milk + water/water-based drinks.
• Complementary feeding — breast milk + solid/semi-solid foods (from 6 months).
• Bottle feeding — feeding from a bottle (discouraged — infection & nipple-confusion risk).

Steps of Correct Technique

• Wash hands; sit comfortably and support the baby's whole body, turned towards the mother.
• Touch the baby's lips with the nipple to trigger rooting; wait for a wide-open mouth.
• Bring the baby to the breast (not the breast to the baby) so a large mouthful of areola is taken.
• Empty one breast fully (for hindmilk) before offering the other; burp the baby after the feed.

WHY Colostrum Must Never Be Discarded

• A practice that costs lives in India is understanding why colostrum — which many communities discard as 'dirty', 'stale' or 'insufficient' — is the most valuable feed the baby will ever receive.
• It is produced in small volume, and it looks thick and yellow — which is precisely why it is mistrusted, and why prelacteal feeds (honey, sugar water, ghutti, animal milk) are given instead.
• But that small volume is exactly matched to the newborn's tiny stomach, and it is extraordinarily concentrated: it is rich in secretory IgA and white cells, which coat the gut and provide the baby's first immune defence against the organisms they are about to meet; it is high in protein, and in vitamin A (protecting against infection and blindness); it is laxative, hastening the passage of meconium and thereby reducing jaundice; and it contains growth factors that mature the gut.
• In effect, it is the baby's first immunisation.
• Discarding it, and replacing it with prelacteal feeds, deprives the baby of this protection and simultaneously introduces infection and interferes with the establishment of lactation.
• Hence: breastfeed within one hour of birth, give colostrum, and give NO prelacteal feeds.

Definition

• Rickets is a disease of the growing bone due to defective mineralisation of the growth plate (physis) and osteoid, most commonly from vitamin D deficiency.
• The equivalent in adults (after epiphyseal fusion) is osteomalacia.

Vitamin D Metabolism

Skin: 7-dehydrocholesterol + UVB → Cholecalciferol (D3) → Liver: 25-hydroxylase → 25-OH-D (storage form; best marker of status) → Kidney: 1-α-hydroxylase → 1,25-(OH)2-D (active form / calcitriol) → Gut: ↑ Ca & PO4 absorption → bone mineralisation

Etiology

• Deficient sunlight exposure (dark skin, pollution, purdah, indoor living) and low dietary vitamin D.
• Exclusive breastfeeding without vitamin D supplementation; prematurity (low stores).
• Malabsorption (coeliac disease, cholestasis); chronic liver / renal disease; anticonvulsants (enzyme induction increases vitamin D breakdown).
• Rarer inherited forms — vitamin-D-dependent rickets, X-linked hypophosphataemic (vitamin-D-resistant) rickets.

Types of Rickets

Clinical Features

General: hypotonia, delayed milestones, pot-belly, growth failure, tetany/seizures (hypocalcaemia), and increased infections.

Head:

• Craniotabes (soft, ping-pong skull — earliest sign in infancy); frontal & parietal bossing (caput quadratum).
• Delayed closure of the anterior fontanelle; delayed dentition and enamel defects.

Chest:

• Rachitic rosary (beading at the costochondral junctions); Harrison's sulcus (a groove at the diaphragm's insertion); pigeon-chest deformity.

Limbs & spine:

• Widening of the wrists & ankles; 'double malleoli'.
• Once weight-bearing — bow legs (genu varum) or knock-knees (genu valgum); coxa vara.
• Kyphoscoliosis and pelvic deformities (important in girls for later childbirth).

Investigations

X-ray (wrist — most useful): cupping, fraying and splaying of the metaphysis; widened, hazy growth plate; generalised osteopenia; greenstick fractures in advanced disease.

Management

• Vitamin D — either daily oral (2000–5000 IU/day for ~6–12 weeks) or 'Stoss' therapy (a single large dose, e.g. ~6 lakh IU) followed by a maintenance dose.
• Calcium supplementation — dietary + oral calcium, especially to prevent 'hungry-bone' hypocalcaemia after starting vitamin D.
• Treat symptomatic hypocalcaemia (IV calcium gluconate for tetany/seizures, with monitoring).
• Correct any underlying cause (malabsorption, renal disease); orthopaedic correction of residual deformity later.

Monitoring Response (radiological Healing)

A dense 'line of provisional calcification' appears at the metaphysis within 2–4 weeks; ALP falls and biochemistry normalises — confirming a good response.

Complications

• Permanent bony deformities; short stature; pathological fractures; pelvic contraction.
• Hypocalcaemic seizures/tetany, laryngospasm; recurrent respiratory infections; anaemia.

Prevention

• Adequate sunlight exposure; routine vitamin D supplementation (400 IU/day) for all infants, especially exclusively breastfed and preterm babies.
• Maternal vitamin D during pregnancy & lactation; food fortification; nutrition education.

Differential Diagnosis of Bow Legs

• Physiological bowing — normal up to ~2 years; symmetrical, painless, resolves spontaneously.
• Blount disease (tibia vara) — pathological, often unilateral/asymmetric.
• Skeletal dysplasia (e.g. Achondroplasia) — disproportionate short stature.
• Rickets is distinguished by the widened wrists, rosary, biochemistry (↑ALP, ↓PO4) and X-ray changes.

Prognosis

• Nutritional rickets responds well and heals completely with vitamin D and calcium if treated early.
• Long-standing disease may leave residual bony deformities (bow legs, pelvic contraction) that need orthopaedic correction; timely treatment prevents these.

WHY Rickets Persists in Sunny India

• A paradox that must be understood is why vitamin D deficiency is common in a country flooded with sunshine.
• The skin makes vitamin D from UVB radiation — but a surprising number of factors block this.
• Skin pigmentation: melanin absorbs UVB, so darker skin requires several times more sun exposure to make the same amount of vitamin D.
• Clothing and custom: covering the body, purdah, and keeping infants indoors.
• Urban living: air pollution and smog absorb UVB; tall buildings shade the streets; and people work indoors and avoid the midday sun.
• Exclusive breastfeeding beyond 6 months without supplementation — because breast milk is a poor source of vitamin D (this is precisely why vitamin D supplementation of all infants is recommended).
• And a diet poor in vitamin D, with little fortification.
• Add prematurity, malabsorption, chronic kidney or liver disease and anticonvulsants, and the picture is complete.
• Hence the answer is not merely 'go outside': it is routine vitamin D supplementation of infants and at-risk groups, food fortification, and treatment of established rickets with vitamin D and calcium — after which the biochemistry corrects in weeks and the deformities largely remodel.

Definition

• Vitamin A deficiency (VAD) is a state of inadequate vitamin A (retinol) causing ocular changes (xerophthalmia) and increased susceptibility to infection.
• It is a leading preventable cause of childhood blindness and a major public-health problem in India.

Functions of Vitamin a

• Formation of rhodopsin (visual pigment) — essential for vision in dim light.
• Maintenance of epithelial integrity (conjunctiva, cornea, respiratory & GI mucosa, skin).
• Supports immune function, growth, cell differentiation and reproduction.

Sources & Daily Requirement

• Preformed (retinol) — liver, egg yolk, milk, fish-liver oils, fortified foods.
• Provitamin (β-carotene) — green leafy vegetables, carrots, mango, papaya, yellow-orange fruits.
• Daily requirement ≈ 350–400 µg retinol in young children.

Etiology

• Inadequate dietary intake (poverty; low intake of green/yellow foods, milk).
• Malabsorption (fat malabsorption, chronic diarrhoea, coeliac disease).
• Increased demand / loss — measles, recurrent infections, and PEM (which depletes retinol-binding protein).

WHO Classification of Xerophthalmia

Other (extra-ocular) Features

• Follicular hyperkeratosis ('toad skin' / phrynoderma).
• Growth retardation; increased frequency and severity of infections (especially measles & diarrhoea).

Vitamin a & Measles

• Measles depletes vitamin A and damages the epithelium, precipitating xerophthalmia; conversely, VAD worsens measles severity and mortality.
• Hence WHO recommends vitamin A for every child with measles (and with SAM).

Investigations

• Mainly a clinical diagnosis.
• Serum retinol < 20 µg/dL (0.7 µmol/L) supports it; conjunctival impression cytology in surveys.

Treatment (WHO High-dose Schedule — Days 1, 2 and 14)

• Treat associated PEM, infections and other micronutrient deficiencies.
• Urgent ophthalmology referral and eye protection for any corneal involvement.

Complications

• Irreversible blindness from keratomalacia / corneal scarring (a leading cause of preventable childhood blindness).
• Markedly increased severity and mortality of measles, diarrhoea and respiratory infections.
• Growth retardation and impaired immunity.

Prognosis

• Early stages (night blindness, Bitot's spots, conjunctival/corneal xerosis) are fully reversible with prompt high-dose vitamin A.
• Once keratomalacia occurs, corneal scarring and permanent blindness often follow — making early recognition and prophylaxis critical.

Keratomalacia can destroy the eye within days — treat urgently.

Definition

• Diarrhoea is the passage of 3 or more loose or watery stools in a 24-hour period (or a change from the normal pattern that the mother considers abnormal).
• Acute diarrhoea lasts < 14 days.
• It is a leading cause of under-5 mortality in India, chiefly through dehydration and its consequences.

Etiology

• Viral (commonest): Rotavirus (the leading cause of severe dehydrating diarrhoea in infants), norovirus, adenovirus.
• Bacterial: enterotoxigenic E. Coli (ETEC), Shigella (dysentery), Vibrio cholerae (rice-water stools), Salmonella, Campylobacter.
• Parasitic: Giardia lamblia, Entamoeba histolytica, Cryptosporidium.
• Non-infective: antibiotic-associated, feeding errors, food allergy, malabsorption.

Pathophysiology (mechanisms)

• Secretory — enterotoxins (e.g. Cholera toxin) activate cAMP → active Cl⁻ and water secretion → voluminous watery stools that persist with fasting.
• Osmotic — unabsorbed solutes (e.g. Lactose in disaccharidase deficiency) draw water into the lumen; stops with fasting.
• Invasive/inflammatory — mucosal invasion (Shigella, Entamoeba) → blood, mucus and pus in stool (dysentery).

Assessment of Dehydration (WHO)

The single most important step is to assess the degree of dehydration, which then guides the treatment plan:

• Reassess every 15–30 min; if not improving, give fluids faster.
• Start ORS (~5 mL/kg/hr) as soon as the child can drink; give zinc when feeding resumes.
• If IV access is impossible → ORS by nasogastric tube (20 mL/kg/hr).

Complications

• Dehydration → hypovolaemic shock, acute kidney injury, and death.
• Electrolyte disturbances — hypo/hypernatraemia, hypokalaemia (ileus, weakness), acidosis.
• Persistent diarrhoea; malnutrition; secondary lactose intolerance; seizures (dysnatraemias).

Prevention

• Exclusive breastfeeding; safe complementary feeding; hand-washing and safe drinking water & sanitation.
• Rotavirus vaccine and measles vaccine; vitamin A; use of ORS + zinc at community level.

Clinical Features

• Frequent loose/watery stools with or without vomiting; the history should note the number, volume and character (watery vs bloody) of stools and vomits.
• Features of dehydration — irritability or lethargy, sunken eyes, dry mouth, reduced urine output, thirst.
• Fever, abdominal pain and, in dysentery, blood/mucus in the stool with tenesmus.
• Signs of associated problems — malnutrition, respiratory infection, or systemic sepsis.

Investigations (usually Clinical; Tests Only If Indicated)

• Most acute watery diarrhoea needs no investigation — assessment of hydration is clinical.
• Stool examination (microscopy/culture) if the stool is bloody, in suspected cholera, in persistent diarrhoea, or in an immunocompromised child.
• Serum electrolytes, blood glucose & renal function in severe dehydration, altered sensorium, convulsions, or before/during IV therapy.
• Blood counts and a septic screen if systemic infection is suspected.

WHY You Must Never Stop Feeding

• One of the most damaging traditional practices in India is understanding why withholding food from a child with diarrhoea — done with the best intentions, to 'rest the bowel' — is actively harmful and kills children.
• It is intuitive to think that if food goes in and diarrhoea comes out, stopping the food will stop the diarrhoea.
• But this is wrong on every count.
• First, the absorptive capacity of the gut is largely preserved even in acute diarrhoea — 60–90% of nutrients continue to be absorbed.
• Second, the gut mucosa depends on luminal nutrition to maintain itself: starving it causes villous atrophy, which impairs absorption further and prolongs the diarrhoea.
• Third, and most importantly, the child is catabolic and is losing protein and nutrients — so a few days of starvation, repeated with each episode of diarrhoea (and Indian children may have several episodes a year), is precisely how acute diarrhoea converts a normally-nourished child into a malnourished one, and a malnourished child into a dead one.
• Hence the rule: continue breastfeeding and feeding throughout, and give an extra meal a day for two weeks afterwards to catch up.

Definition

• Oral Rehydration Therapy (ORT) is the administration of fluid by mouth to prevent or correct the dehydration caused by diarrhoea.
• Oral Rehydration Solution (ORS) is the specially formulated glucose-electrolyte solution used for this purpose.
• ORT has been described as 'potentially the most important medical advance of the 20th century' for its impact on child survival.

Scientific Basis — Sodium-glucose Co-transport

• The intestinal mucosa has a sodium-glucose co-transporter (SGLT-1) that absorbs sodium and glucose together in a 1:1 ratio, dragging water with them.
• This transporter remains intact even in secretory diarrhoea (e.g. Cholera), which is why oral glucose-salt solutions can rehydrate a child whose gut is actively secreting fluid.

Composition of WHO Low-osmolarity ORS (2002)

How to Give ORS

• Dissolve one packet in 1 litre of clean water; discard after 24 hours.
• Give frequently in small sips by spoon or cup (not by bottle); if the child vomits, wait 10 minutes and continue more slowly.
• Amounts follow the WHO plans — Plan A (after each stool) or Plan B (75 mL/kg over 4 hours).
• Continue breastfeeding and feeding alongside ORS.

Home-available Fluids (when ORS Packets Are Unavailable)

• Salt-and-sugar solution (a pinch of salt + a fistful/scoop of sugar in a glass of water), rice-based ORS (kanji), buttermilk, coconut water, soups.
• Cereal-based ORS (rice-ORS) is especially useful in cholera as it further reduces stool volume.

Advantages of Ort

• Simple, cheap, safe and effective; can be given at home by mothers.
• Avoids the risks, cost and skill needs of IV therapy; can be scaled up in the community.
• Physiological — corrects dehydration, acidosis and potassium loss together.

Failure / Limitations of Ort

• Contraindications: severe dehydration with shock, altered sensorium / inability to drink, ileus/abdominal distension, and very high purging (stool > 10 mL/kg/hr).
• Persistent vomiting despite slow administration → consider nasogastric ORS or IV fluids.
• These situations require initial IV therapy (Plan C), switching to ORS once the child can drink.

Evolution of ORS

• The original WHO ORS (1975) had an osmolarity of 311 mOsm/L and was designed mainly for cholera in adults.
• Because it caused a slightly high stool output in children with non-cholera diarrhoea, it was replaced in 2002 by the reduced (low)-osmolarity ORS (245 mOsm/L), which is now the universal standard for all ages.

Standard VS Low-osmolarity ORS

Use in Special Situations

• Cholera — ORS works well; a rice/cereal-based ORS further reduces stool volume.
• Severe acute malnutrition — use ReSoMal (lower sodium, higher potassium) instead of standard ORS.
• Hypernatraemic dehydration — ORS is safe and preferred, as it corrects sodium gradually.

'super ORS' (cereal / Amino-acid Based)

Polymer (rice/cereal)-based ORS provides glucose polymers that are digested gradually, adding more co-transport substrate without raising osmolarity — reducing stool output, especially in cholera.

Monitoring the Response

• Reassess hydration, urine output and ongoing stool losses regularly.
• Watch for signs of over-hydration (puffy eyelids) → pause ORS and give plain water/breast milk.
• Escalate to IV fluids if there is persistent vomiting, worsening dehydration, or the child cannot drink.

WHY Low-osmolarity ORS Is Better

• A refinement worth understanding is why the original ORS formulation was replaced by a lower-osmolarity one — and why less sodium and glucose works better.
• The original solution had an osmolarity (311 mOsm/L) roughly equal to that of plasma.
• But research showed a problem: in the upper small intestine, the luminal contents are already hypertonic during diarrhoea — and a solution of that osmolarity could, in some children, draw water into the lumen (an osmotic effect), transiently increasing the stool output and risking hypernatraemia.
• Reducing the sodium (to 75 mmol/L) and glucose (to 75 mmol/L), giving a total osmolarity of 245 mOsm/L — HYPOtonic relative to plasma — turned the gradient the right way.
• Trials showed that this reduced stool output, reduced vomiting, and reduced the need for unscheduled intravenous fluid — all by about 20–30% — without any increase in hyponatraemia.
• Hence low-osmolarity ORS is now the global standard for all causes of diarrhoea in children.
• It also contains potassium (20 mmol/L — replacing the large potassium losses of childhood diarrhoea) and citrate (correcting the metabolic acidosis).

Definition

• Persistent diarrhoea is an episode of diarrhoea, presumed to be of infectious origin, that starts acutely but lasts for 14 days or more.
• It must be distinguished from chronic diarrhoea (≥ 14 days but usually of a non-infectious, often congenital cause).
• Persistent diarrhoea carries a high risk of malnutrition and death.

Risk Factors

• Young age (< 6 months) and malnutrition (a bidirectional relationship).
• Recent acute diarrhoea; lack of breastfeeding; artificial/animal-milk feeding.
• Recent measles; immunodeficiency (including HIV); previous inappropriate antibiotic use.
• Micronutrient deficiency (zinc, vitamin A).

Pathophysiology

• Persistent mucosal injury → villous atrophy → reduced absorptive surface and loss of brush-border enzymes.
• Secondary lactose (disaccharidase) deficiency → osmotic diarrhoea on milk feeds.
• Cow's-milk / soy protein sensitivity and small-bowel bacterial overgrowth.
• A vicious cycle of infection → mucosal damage → malabsorption → malnutrition → impaired mucosal repair & immunity → continued diarrhoea.

Causes

• Persistent/sequential enteric infection (E. Coli, Shigella, Salmonella, Cryptosporidium, Giardia).
• Post-enteritis lactose intolerance and cow-milk protein intolerance.
• Underlying malnutrition and micronutrient deficiency.

Clinical Evaluation

• Assess hydration and nutritional status (weight, oedema, MUAC) — the two priorities.
• History — duration, stool character (watery vs bloody), feeds (milk relation), prior antibiotics, associated infections.
• Look for systemic infection (pneumonia, UTI, sepsis, TB) and signs of specific deficiencies.

Investigations

• Stool — microscopy (ova, cysts, pus cells, RBCs), reducing substances & pH (low pH + positive reducing substances = lactose intolerance), culture.
• Blood — CBC, electrolytes, blood glucose; screen for HIV and systemic infection.
• Assess for associated deficiencies (zinc, vitamin A).

Management — Principles

• Treat & prevent dehydration — ORS (some/severe dehydration by Plans B/C); most children have no dehydration.
• Nutritional management is the cornerstone:
• Continue breastfeeding.
• Reduce the lactose load — replace animal milk with yoghurt/curd or a low-lactose diet; give energy-dense, frequent, mixed cereal-based feeds.
• Provide adequate calories (~150 kcal/kg/day) for catch-up; a lactose-free/milk-free diet only if the above fails.
• Micronutrients — zinc for 14 days, plus vitamin A, folate, copper and multivitamins.
• Antibiotics only for identified pathogens / dysentery / associated systemic infection (not routine).
• Treat associated infections (pneumonia, UTI, sepsis).

Complications

• Progressive malnutrition and growth faltering; recurrent dehydration.
• Electrolyte disturbances; sepsis; and increased mortality.

Prevention

• Exclusive breastfeeding; appropriate complementary feeding; avoid unnecessary antibiotics in acute diarrhoea.
• Zinc supplementation, measles & rotavirus immunisation, vitamin A, and good hygiene/sanitation.

Clinical Features

• Prolonged (≥ 14 days) loose stools, often with a relation to milk feeds (suggesting lactose intolerance).
• Weight loss / growth faltering and features of malnutrition and micronutrient deficiency.
• Recurrent dehydration; perianal excoriation (from acidic, sugary stools); and features of any underlying infection.

Step-wise Dietary Management (the Cornerstone)

Follow-up & Monitoring

• Monitor weight gain, stool frequency and hydration daily during treatment.
• A successful diet produces reducing stool frequency and steady weight gain within a few days.
• Ensure completion of zinc (14 days) and vitamin A; catch-up nutrition after recovery.

When to Refer / Investigate Further

• Failure to respond to standard dietary management; severe malnutrition with complications.
• Suspected specific cause — coeliac disease, immunodeficiency/HIV, congenital diarrhoea, or IBD.

Micronutrient & Mineral Supplementation

• Give double the RDA of vitamins & minerals for 2 weeks — including folate, vitamin A, copper and magnesium.
• Zinc for 14 days is essential (it restores the gut mucosa and reduces relapse).
• Treat iron-deficiency anaemia during the recovery phase.

Criteria for Hospital Admission

• Severe dehydration or inability to feed; systemic infection (sepsis, pneumonia).
• Severe acute malnutrition; young infant (< 4 months); failure of home/OPD management.
• Any danger sign — lethargy, high fever, persistent vomiting, convulsions.

Introduction

• Fluid therapy in a sick child aims to provide the maintenance requirement, replace any existing deficit (dehydration), and cover ongoing (continuing) losses.
• Children are more vulnerable to fluid imbalance than adults because of a higher body-water content, larger surface area and higher metabolic/turnover rate.

Body Water Compartments

• Total body water is higher in children (~75% in a newborn, ~60% in an adult).
• Distributed as intracellular fluid (ICF) and extracellular fluid (ECF = interstitial + plasma).
• Infants have a proportionately larger ECF, making them more prone to rapid dehydration.

Maintenance Fluid — Holliday-segar Method

Maintenance replaces normal daily insensible and urinary losses. The Holliday-Segar formula (per 24 hours):

Hourly ('4-2-1') rule: 4 mL/kg/hr for the first 10 kg + 2 mL/kg/hr for the next 10 kg + 1 mL/kg/hr for each kg above 20 kg. Example: a 25 kg child = 1000 + 500 + 100 = 1600 mL/day.

Ongoing Losses

Replace continuing losses (diarrhoea, vomiting, drains, ileostomy) volume-for-volume with an appropriate fluid (e.g. ORS or Ringer lactate for stool losses).

Types of IV Fluids

Management of Shock (hypovolaemic)

• Rapid bolus of 20 mL/kg of Ringer lactate / normal saline over 15–20 min; repeat up to 40–60 mL/kg while reassessing.
• In severe malnutrition, fluids are given more cautiously (risk of heart failure) — smaller volumes with close monitoring.
• Add inotropes for fluid-refractory shock; treat the underlying cause (sepsis).

Monitoring

• Vitals, capillary refill, urine output (aim > 1 mL/kg/hr), daily weight, and level of consciousness.
• Serial electrolytes, blood glucose and acid-base status.
• Watch for over-hydration (puffiness, raised JVP, crepitations) and correct sodium disturbances at a safe rate.

Worked Examples

• Maintenance — a 16 kg child: (10 × 100) + (6 × 50) = 1300 mL/day (≈ 54 mL/hr).
• Deficit — an 8 kg infant with 10% (severe) dehydration: deficit = 10% × 8 kg = 800 mL, replaced with WHO Plan C (Ringer lactate 100 mL/kg = 800 mL as 30 + 70 mL/kg).
• Total = maintenance + deficit + ongoing stool losses, reassessed frequently.

Estimating the Deficit

Special Situations

• Severe malnutrition — give fluids cautiously (use ReSoMal orally; IV only for shock) because of the risk of heart failure.
• Diabetic ketoacidosis — slow, careful rehydration over 48 h to avoid cerebral oedema.
• Shock — rapid isotonic boluses (20 mL/kg) take priority over deficit calculations.

Common Errors to Avoid

• Using hypotonic maintenance fluids in sick children → hospital-acquired hyponatraemia.
• Rapid correction of chronic dysnatraemias; and adding potassium before urine output is established.

Daily Electrolyte & Glucose Requirements

Practical Point

In practice, maintenance is written as a specific fluid at a calculated hourly rate — e.g. Isotonic saline with 5% dextrose and added KCl — reassessing the child clinically at least every few hours and adjusting for ongoing losses.

Maintenance: 100/50/20 mL/kg for successive 10 kg bands.

Definition

• Dysentery is diarrhoea with visible blood (and often mucus) in the stool, reflecting invasion and inflammation of the colonic mucosa.
• Unlike acute watery diarrhoea (a fluid-loss problem), dysentery is primarily an invasive mucosal infection and carries a risk of serious complications.

Etiology

• Shigella — the commonest and most important cause of acute bacillary dysentery (S. Flexneri, S. Dysenteriae).
• Other bacteria — enteroinvasive/enterohaemorrhagic E. Coli (EHEC), Campylobacter, Salmonella, Yersinia.
• Entamoeba histolytica — amoebic dysentery (more insidious).
• Non-infective — intussusception, Meckel's diverticulum, IBD (consider if atypical).

Bacillary VS Amoebic Dysentery

Clinical Features

• Frequent, small-volume bloody-mucoid stools with tenesmus and cramping abdominal pain.
• Fever (often high), anorexia, and rapid weight loss.
• Shigella can cause convulsions, altered sensorium and rectal prolapse, especially in young children.

Investigations

• Stool microscopy — pus cells, RBCs, and amoebic trophozoites (with ingested RBCs) if amoebiasis.
• Stool culture & sensitivity (Shigella); CBC (leukocytosis; anaemia).
• Electrolytes, renal function; monitor for complications (e.g. HUS with EHEC).

Management

• Assess & treat dehydration (Plans A/B/C) and continue feeding — nutrition is vital as dysentery rapidly worsens nutritional status.
• Antibiotics are indicated (unlike watery diarrhoea): first-line for shigellosis is ciprofloxacin (or azithromycin / ceftriaxone as per sensitivity) for ~3–5 days.
• Amoebic dysentery: metronidazole (30–50 mg/kg/day × 7–10 days) followed by a luminal amoebicide (diloxanide furoate).
• Zinc for 14 days; vitamin A; treat associated malnutrition.
• Avoid anti-motility drugs (they worsen invasive disease).

Complications

• Shigella: convulsions, toxic megacolon, intestinal perforation, rectal prolapse, reactive arthritis, and haemolytic uraemic syndrome (HUS) (esp. S. Dysenteriae type 1 & EHEC).
• Amoebic: liver abscess, amoeboma, perforation.
• Rapid dehydration, electrolyte imbalance and severe malnutrition.

Prevention

• Safe drinking water, sanitation and hand-washing (faeco-oral spread).
• Exclusive breastfeeding; hygienic food handling; prompt recognition & treatment.
• Improved nutrition and vitamin A/zinc to reduce severity.

Epidemiology & Pathogenesis

• Spread is faeco-oral via contaminated food/water and person-to-person; a very low infective dose makes Shigella highly contagious.
• Organisms invade the colonic epithelium, multiply, and produce inflammation, ulceration and micro-abscesses → blood, mucus and pus in the stool.
• S. Dysenteriae type 1 produces Shiga toxin, which can damage vascular endothelium and precipitate haemolytic uraemic syndrome.

Haemolytic Uraemic Syndrome (hus) — Key Complication

• A triad of microangiopathic haemolytic anaemia, thrombocytopenia and acute kidney injury.
• Follows Shiga-toxin-producing infection (S. Dysenteriae type 1 / EHEC O157:H7); presents with pallor, oliguria and bleeding.
• Avoid antibiotics and anti-motility drugs in suspected EHEC, as they may increase the risk of HUS; management is largely supportive (± dialysis).

Prognosis

With prompt rehydration, appropriate antibiotics and nutritional support, most children recover well; delay, malnutrition, very young age and complications (HUS, perforation, toxic megacolon) worsen the outcome.

Assessment at Presentation

• Confirm blood in the stool (visible or on microscopy) and assess the degree of dehydration (Plans A/B/C).
• Assess nutritional status — dysentery causes rapid protein loss and precipitates malnutrition.
• Look for danger signs — convulsions, abdominal distension (toxic megacolon), rectal prolapse, or signs of HUS (pallor, oliguria).

Dietary & Supportive Care

• Continue breastfeeding and give frequent, energy-dense feeds throughout the illness.
• Give an extra meal daily for 2 weeks after recovery to make up the nutritional loss.
• Ensure zinc (14 days) and vitamin A; treat anaemia and any associated infection.

Antibiotic Selection

Avoid antimotility drugs — risk of toxic megacolon.

Definition

• Bronchial asthma is a chronic inflammatory disorder of the airways characterised by reversible airflow obstruction, bronchial hyper-responsiveness and recurrent episodes of wheeze, cough, breathlessness and chest tightness.
• It is the commonest chronic respiratory disease of childhood.

Etiology & Triggers

• Host factors — genetic predisposition and atopy (personal/family history of eczema, allergic rhinitis).
• Viral respiratory infections — the commonest trigger of exacerbations in children (rhinovirus, RSV).
• Allergens — house-dust mite, pollen, moulds, pet danders, cockroach.
• Irritants & others — tobacco/biomass smoke, air pollution, cold air, exercise, strong emotions and certain drugs (aspirin, NSAIDs).

Pathophysiology

Trigger + atopic (Th2) inflammation → Mast cells, eosinophils, IgE activated → Bronchoconstriction + mucosal oedema + mucus plugging → Airflow obstruction (reversible) → Chronic inflammation → airway remodelling (fixed component)

The early phase (bronchoconstriction) is mediated by histamine and leukotrienes; the late phase (inflammation, oedema) occurs hours later. Persistent inflammation causes airway hyper-responsiveness and, over time, remodelling.

Clinical Features

• Recurrent, episodic wheeze, cough (often nocturnal/early-morning), breathlessness and chest tightness.
• Symptoms show diurnal variation (worse at night) and are triggered by the above factors.
• History of atopy (eczema, allergic rhinitis) in the child or family.
• Examination in an attack — tachypnoea, prolonged expiration, polyphonic wheeze, use of accessory muscles, hyperinflated chest.

Diagnosis & Investigations

• Largely a clinical diagnosis based on the recurrent, reversible pattern of symptoms.
• Spirometry (age > 5 yr) — an obstructive pattern (↓ FEV1/FVC) with reversibility (FEV1 improves ≥ 12% after a bronchodilator).
• Peak Expiratory Flow Rate (PEFR) — diurnal variability > 13% supports asthma and helps monitoring.
• Supportive — chest X-ray (to exclude other causes; may show hyperinflation), allergy testing, and a therapeutic trial of inhaled steroids.

Assessment of Acute Severity

Management of Acute Exacerbation

• Oxygen to maintain SpO2 ≥ 94%.
• Inhaled SABA — salbutamol via MDI + spacer (2–6 puffs) or nebuliser, repeated every 20 min in the first hour.
• Add ipratropium bromide nebulisation in moderate–severe attacks.
• Systemic corticosteroids — oral prednisolone 1–2 mg/kg (or IV hydrocortisone) early in all but the mildest attacks.
• IV magnesium sulfate in severe/life-threatening attacks; consider IV salbutamol/aminophylline and ICU care/ventilation if not responding.

Long-term (controller) Management — Stepwise (gina)

• Reliever — inhaled SABA (or low-dose ICS-formoterol) as needed.
• Controller — inhaled corticosteroid (ICS) is the cornerstone; step up to ICS + LABA, then higher-dose ICS.
• Add-on — leukotriene receptor antagonist (montelukast); biologics for severe allergic asthma.
• Step up if poorly controlled, step down once controlled for ~3 months; use the lowest effective dose.

Patient & Family Education

• Correct inhaler technique (MDI + spacer) — check at every visit.
• Trigger avoidance; a written asthma action plan; recognise danger signs.
• Adherence to controller therapy; treat allergic rhinitis; annual influenza vaccine.

Complications

• Acute — status asthmaticus, pneumothorax, respiratory failure.
• Chronic — airway remodelling with fixed obstruction, growth & school impact, and steroid side-effects.

Differential Diagnosis of Recurrent Wheeze

• Bronchiolitis (first episode in an infant, viral), foreign body (sudden onset, unilateral).
• Gastro-oesophageal reflux; recurrent aspiration; tuberculosis; suppurative lung disease.
• Cystic fibrosis (with failure to thrive/steatorrhoea); congenital heart disease; structural airway anomaly (vascular ring).

Assessment of Control (gina)

• In the past 4 weeks — daytime symptoms > twice/week, any night waking, reliever use > twice/week, or any activity limitation.
• None → well-controlled; 1–2 → partly controlled; 3–4 → uncontrolled.
• Control guides stepping up or down of therapy at each review.

Special Patterns

• Exercise-induced asthma — wheeze/cough during or after exertion; pre-treat with a SABA and ensure good baseline control.
• Cough-variant asthma — persistent dry cough (often nocturnal) as the only symptom.

Definition

• Pneumonia is an acute inflammation of the lung parenchyma (alveoli), usually infective, presenting with cough, fever and fast/difficult breathing.
• It is a leading cause of under-5 mortality worldwide and in India.

Etiology (varies with Age)

• Neonates: Group B Streptococcus, E. Coli, Klebsiella, Listeria.
• Infants & young children: viruses are commonest (RSV, influenza); the leading bacterium is Streptococcus pneumoniae, then H. Influenzae type b and Staphylococcus aureus.
• Older children (> 5 yr): Mycoplasma pneumoniae (atypical), S. Pneumoniae, Chlamydophila.
• Special settings — Staph aureus (post-measles, empyema/pneumatocele), TB, Pneumocystis (in HIV).

WHO / Imnci Classification (cough or Difficult Breathing)

Clinical Features

• Fever, cough, and fast/difficult breathing; poor feeding and irritability.
• Signs of respiratory distress — chest indrawing, nasal flaring, grunting, head-nodding, cyanosis.
• Chest signs — reduced air entry, crepitations, bronchial breathing, dullness (if consolidation/effusion).

Investigations

• Often a clinical diagnosis; pulse oximetry to assess hypoxia.
• Chest X-ray — lobar consolidation (bacterial) or diffuse/patchy infiltrates (viral/atypical); detects effusion/empyema.
• CBC, CRP; blood culture in severe cases; sputum/NP aspirate; Mantoux/GeneXpert if TB suspected.

Management

• Pneumonia (fast breathing): home care with oral amoxicillin (the drug of choice) for 5 days; supportive care and review.
• Severe pneumonia: admit, give oxygen (target SpO2 ≥ 90%), IV antibiotics (ampicillin + gentamicin, or ceftriaxone; add cloxacillin/vancomycin for suspected Staph).
• Supportive care — maintain hydration & nutrition, antipyretics, continue breastfeeding, and treat wheeze if present.
• Switch to oral antibiotics once improving; total course guided by severity and organism.

Complications

• Parapneumonic effusion / empyema; lung abscess; pneumatocele and pneumothorax (Staph).
• Respiratory failure; septicaemia and metastatic infection; SIADH.

Prevention

• Immunisation — PCV (pneumococcal), Hib, measles, pertussis and influenza vaccines.
• Exclusive breastfeeding, adequate nutrition, vitamin A, zinc; hand hygiene.
• Reduce indoor air pollution (biomass smoke) and overcrowding; avoid tobacco exposure.

Pathophysiology

Pathogen reaches the alveoli → Inflammatory exudate fills alveoli (consolidation) → Impaired gas exchange (V/Q mismatch) → Hypoxia, fast breathing & work of breathing ↑

Types / Radiological Patterns

• Lobar pneumonia — consolidation of a lobe (typically pneumococcal).
• Bronchopneumonia — patchy, bilateral infiltrates (common in infants).
• Interstitial / atypical — diffuse pattern (viral, Mycoplasma).

Differential Diagnosis

• Bronchiolitis and asthma (wheeze-predominant); tuberculosis (chronic course, contact history).
• Foreign-body aspiration (non-resolving/localised); congestive cardiac failure; empyema.

Indications for Hospital Admission

• Severe pneumonia (chest indrawing / any danger sign); hypoxia (SpO2 < 90%).
• Age < 2 months; inability to feed/drink; severe malnutrition or significant comorbidity.
• Failure of oral outpatient therapy; complications (effusion/empyema).

Empirical Antibiotic Choice

Supportive Care

• Oxygen to maintain SpO2 ≥ 90%; antipyretics for fever/comfort.
• Maintain hydration and nutrition; continue breastfeeding; small frequent feeds or IV fluids if unable to feed.
• Clear nasal secretions; treat associated wheeze; monitor for deterioration and complications.

Definition

• Acute bronchiolitis is an acute viral lower respiratory tract infection of infants (usually < 2 years, peak 2–6 months), characterised by inflammation and obstruction of the small airways (bronchioles), producing wheeze and respiratory distress.
• It typically occurs in winter epidemics.

Etiology

• Respiratory Syncytial Virus (RSV) — the commonest cause (~70%).
• Others — human metapneumovirus, parainfluenza, influenza, adenovirus, rhinovirus.
• Spread is by droplets and contact; highly contagious (hospital & household spread).

Pathophysiology

Viral infection of bronchiolar epithelium → Inflammation, oedema & mucus + sloughed cells → Small-airway obstruction (a 'ball-valve' effect) → Air trapping + hyperinflation and patchy collapse → V/Q mismatch → hypoxia and increased work of breathing

Clinical Features

• A preceding coryza (runny nose, mild fever) for 1–3 days, then lower-respiratory signs.
• Cough, wheeze, tachypnoea and feeding difficulty (breathlessness interrupts feeds).
• Respiratory distress — chest indrawing, nasal flaring, grunting; a hyperinflated chest.
• Auscultation — fine end-inspiratory crepitations with widespread wheeze.
• Apnoea may be the presenting feature in young/preterm infants.

Risk Factors for Severe Disease

• Age < 3 months; prematurity; low birth weight.
• Congenital heart disease, chronic lung disease, immunodeficiency, and neuromuscular disease.

Diagnosis & Investigations

• A clinical diagnosis; investigations are usually unnecessary.
• Pulse oximetry to assess hypoxia; chest X-ray (if atypical) shows hyperinflation, patchy atelectasis.
• Nasopharyngeal aspirate for RSV (rapid antigen/PCR) — mainly for cohorting in hospital.

Management — Mainly Supportive

• Oxygen for hypoxia (SpO2 < 90–92%); gentle nasal suction to clear secretions.
• Maintain hydration & feeding — small frequent feeds; NG or IV fluids if unable to feed.
• Minimal handling; monitor for apnoea and worsening distress.
• Respiratory support (high-flow nasal cannula / CPAP / ventilation) for severe disease.

Epidemiology

• Chiefly affects infants < 2 years, peaking at 2–6 months; occurs in winter epidemics.
• A leading cause of infant hospitalisation for respiratory illness.

Assessment of Severity

• Mild: feeding well, minimal distress, SpO2 normal.
• Moderate: some feeding difficulty, chest indrawing, tachypnoea.
• Severe: poor feeding, marked distress/grunting, SpO2 < 92%, apnoea, exhaustion.

Criteria for Hospital Admission

• Poor feeding (< 50% of normal) or dehydration; apnoea.
• Hypoxia (SpO2 < 92%); severe respiratory distress; age < 3 months or high-risk infant.

Differential Diagnosis

Prognosis

Most infants recover fully within 1–2 weeks. Some have recurrent viral wheeze in early childhood; severe RSV bronchiolitis in infancy is associated with later wheezing tendency.

Clinical Course

• Illness typically peaks around days 3–5 and then improves over 1–2 weeks; cough may linger longer.
• Close monitoring during the peak is important, especially in young infants at risk of apnoea.

Key Supportive Measures

• Ensure adequate hydration — offer small, frequent feeds; use NG/IV fluids if feeding is inadequate.
• Gentle nasal saline and suction before feeds; nurse with the head slightly elevated.
• Reassess frequently for hypoxia, apnoea and worsening work of breathing.

Management is supportive — bronchodilators are of little value.

Definition

• Foreign body (FB) aspiration is the inhalation of an object into the airway (larynx, trachea or bronchi).
• It is a paediatric emergency, most common in children aged 1–3 years, in whom curiosity, incomplete dentition and immature swallowing coordination increase the risk.

Common Foreign Bodies & Site

• Organic objects are commonest — groundnuts/peanuts, seeds, pulses; also small toy parts, beads, and pins.
• The right main bronchus is the commonest site of lodgement (it is wider, shorter and more vertical).
• Most FBs are radiolucent (organic), so they are not seen directly on X-ray.

Clinical Phases

• Initial phase — sudden choking, coughing, gagging and wheeze at the time of aspiration (a witnessed 'choking episode' is the key clue).
• Asymptomatic (latent) phase — symptoms settle as the FB lodges; this false reassurance often delays diagnosis.
• Complications phase — persistent cough, recurrent/non-resolving pneumonia, localised wheeze or lung collapse.

Clinical Features (BY Site)

• Laryngeal/tracheal FB: stridor, hoarseness, severe distress — can cause complete obstruction and asphyxia (an emergency).
• Bronchial FB: unilateral wheeze, reduced air entry and a hyper-resonant/dull hemithorax on the affected side.

Investigations

• Chest X-ray — an opaque FB is directly seen; a radiolucent FB shows indirect signs: unilateral obstructive emphysema (air trapping), mediastinal shift away from the affected side, atelectasis, or non-resolving consolidation.
• Inspiratory–expiratory (or lateral decubitus) films highlight air trapping.
• Bronchoscopy — both diagnostic and therapeutic; a normal X-ray does not exclude an FB, so a strong history warrants bronchoscopy.

Management — Acute Complete Obstruction (choking Child)

• Infant (< 1 yr): alternate 5 back blows + 5 chest thrusts (head down).
• Older child: abdominal thrusts (Heimlich manoeuvre).
• If the child becomes unconscious → start CPR and attempt to visualise/remove the FB.
• Do not perform blind finger sweeps (risk of pushing the FB deeper).

Management — Definitive

• Rigid bronchoscopy under general anaesthesia is the treatment of choice for removal.
• Antibiotics and physiotherapy for associated infection/atelectasis; treat complications.

Complications & Prevention

• Complications: asphyxia/death, recurrent pneumonia, lung abscess, bronchiectasis, atelectasis, pneumothorax.
• Prevention: avoid giving nuts, seeds and small hard foods to children under 3 years; keep small objects out of reach; supervise feeding; parental awareness.

WHY Children Are Prone

• The habit of putting objects in the mouth and running/playing while eating.
• Incomplete dentition (poor chewing of nuts) and immature airway-protective (swallowing) coordination.
• Peak age 1–3 years.

Differential Diagnosis

• Croup and asthma (wheeze/stridor without a choking history); recurrent pneumonia of other cause.
• The key discriminator is a witnessed choking/aspiration episode.

Post-removal Care

• Observe for airway oedema/laryngospasm; chest physiotherapy and antibiotics for associated infection/atelectasis.
• Repeat imaging to confirm re-expansion of the lung.

Prognosis

Excellent with early recognition and bronchoscopic removal. Delayed diagnosis leads to recurrent pneumonia, bronchiectasis and lung damage — hence a low threshold for bronchoscopy on a strong history.

Features BY Site of Lodgement

Radiological Signs (radiolucent FB)

• Obstructive emphysema (air trapping) of the affected side — hyperlucent lung.
• Mediastinal shift away from the affected side (more marked on expiration).
• Atelectasis/collapse or persistent, non-resolving consolidation distal to the obstruction.

A normal chest radiograph does not exclude it — bronchoscopy if suspected.

Definition

• Croup (acute laryngotracheobronchitis) is a common viral infection causing inflammation of the larynx, trachea and bronchi, leading to upper-airway obstruction.
• It typically affects children aged 6 months to 3 years and is the commonest cause of acute stridor with fever in this age group.

Etiology

• Parainfluenza virus (types 1 & 3) — the commonest cause.
• Others — RSV, influenza, adenovirus, and (rarely) measles.
• It occurs in autumn/winter; subglottic oedema in a narrow infant airway causes the obstruction.

Pathophysiology

Viral infection of the larynx & subglottis → Inflammation & oedema of the subglottic region → Narrowing of the already-small infant airway → Turbulent airflow → inspiratory stridor + barking cough

Clinical Features

• A preceding coryza and low-grade fever for 1–2 days.
• The classic triad — barking ('seal-like') cough, inspiratory stridor, and a hoarse voice.
• Symptoms are typically worse at night and with crying/agitation.
• Signs of increasing obstruction — stridor at rest, chest indrawing, tachypnoea, restlessness, and (late/ominous) cyanosis, drowsiness or a silent chest.

Assessment of Severity (westley Score Concept)

• Mild: barking cough, no stridor at rest, no/mild indrawing — the child is playful and feeding.
• Moderate: stridor at rest with chest indrawing, but no agitation.
• Severe: stridor at rest with marked indrawing, agitation/distress.
• Impending respiratory failure: lethargy, decreasing stridor with fatigue, cyanosis.

Investigations

• A clinical diagnosis — avoid distressing the child.
• If done, a neck X-ray (AP) may show the 'steeple sign' (subglottic narrowing).
• Do not examine the throat or perform painful procedures if severe obstruction is suspected.

Management

• Keep the child calm (crying worsens obstruction); allow the parent to comfort them.
• Corticosteroids for all — a single dose of oral dexamethasone (0.15–0.6 mg/kg) (or nebulised budesonide) reduces oedema and severity.
• Moderate–severe: add nebulised adrenaline (rapid but temporary relief — observe for rebound for 2–4 hours) and give oxygen.
• Impending failure: senior/anaesthetic help and airway management (intubation) in a controlled setting.
• Maintain hydration; most mild cases are managed and discharged home with advice.

Differential Diagnosis of Acute Stridor

Epidemiology

• Commonest in children aged 6 months–3 years; occurs in autumn/winter.
• The commonest cause of acute stridor with fever in this age group.

Spasmodic (recurrent) Croup

A variant with sudden night-time barking cough and stridor without preceding fever/coryza, often recurrent, with an allergic/atopic tendency. It settles quickly and is managed like viral croup.

Criteria for Hospital Admission

• Stridor at rest, moderate–severe chest indrawing, or hypoxia.
• Poor response to steroids/adrenaline; toxic appearance or diagnostic doubt; young infant or poor social support.

Prognosis

Most croup is mild and self-limiting, resolving in 3–5 days; steroids markedly reduce severity and the need for admission. Serious airway obstruction is uncommon but must be anticipated.

Medications at a Glance

Home Advice (mild Croup)

• Keep the child calm and comfortable; ensure adequate fluids.
• Return urgently if there is stridor at rest, chest indrawing, drooling, cyanosis or the child looks unwell.

WHY You Must Not Upset the Child

• The most important practical rule in a child with stridor is understanding why agitating the child can turn a partial airway obstruction into a complete one.
• Stridor arises from turbulent flow through a narrowed EXTRAthoracic airway.
• Now consider the mechanics: on inspiration, the pressure inside the extrathoracic airway falls below atmospheric — so the narrowed, floppy segment is sucked further inward.
• The harder and faster the child breathes, the more negative that inspiratory pressure becomes — and the more the airway collapses.
• So a crying, struggling, frightened child generates powerful negative pressures and worsens their own obstruction — while simultaneously increasing their oxygen consumption.
• This is why the cardinal rule of paediatric airway management is: keep the child calm.
• Leave them on the parent's lap, in whatever position they choose; do not lie them down; do not attempt to cannulate them; do not force an oxygen mask on them; and — above all — DO not examine the throat if epiglottitis is suspected, since a tongue depressor can precipitate complete obstruction and death.

WHY Every Child with Croup Gets Steroids

• A remarkable and evidence-based point is understanding why a single dose of dexamethasone is given to every child with croup — even the mildest case.
• Croup is caused by a virus (usually parainfluenza) producing inflammation and oedema of the subglottic region — the narrowest part of a child's airway, and one encircled by rigid cricoid cartilage, so the swelling can only expand inwards.
• Because of the fourth-power law, even a millimetre of oedema causes a huge rise in resistance.
• Corticosteroids reduce that oedema — and the trials are unambiguous: a single dose of dexamethasone (0.15–0.6 mg/kg, oral or IM) reduces the severity and duration of symptoms, reduces return visits and admissions, and reduces the need for intubation — in all grades of severity, including mild croup.
• The benefit begins within 2–3 hours and it is cheap and safe.
• Nebulised adrenaline is added in moderate-to-severe croup — it acts within minutes by vasoconstricting the mucosa, but its effect wears off in 2 hours, so the child must be observed for rebound.
• Humidified air, long used, has no proven benefit.

Definition

• A Ventricular Septal Defect (VSD) is an abnormal opening in the interventricular septum that allows communication between the two ventricles.
• It is the commonest congenital heart disease (~30% of all CHD) and is an acyanotic, left-to-right shunt lesion.

Types (BY Location)

• Perimembranous — the commonest type (~70%), in the membranous septum.
• Muscular — in the muscular septum; often multiple; many close spontaneously.
• Inlet (AV-canal type) and outlet (supracristal) defects.

Haemodynamics

Higher LV pressure → blood shunts L → R across the VSD → ↑ Pulmonary blood flow & volume overload of LA/LV → If large & long-standing → pulmonary arterial hypertension → Reversal to R → L shunt = Eisenmenger syndrome (cyanosis)

• The size of the shunt depends on the size of the defect and the pulmonary vascular resistance (PVR).
• A small (restrictive) VSD has a big pressure drop and a small shunt; a large VSD equalises ventricular pressures and produces a large shunt once the neonatal PVR falls.

Clinical Features

• Small VSD: usually asymptomatic; a loud, harsh pansystolic murmur at the left lower sternal border with a thrill (the 'maladie de Roger').
• Large VSD: presents at 6–8 weeks (as PVR falls) with heart failure — poor feeding, sweating, tachypnoea, recurrent chest infections and failure to thrive.
• Signs — pansystolic murmur, precordial thrill/heave, a loud P2 (pulmonary hypertension) and a mid-diastolic mitral flow murmur (large shunt).
• The softer the murmur becomes with a loud single S2, the more one should worry about developing pulmonary vascular disease.

Investigations

• Chest X-ray — cardiomegaly with increased pulmonary vascular markings (plethora) in large shunts; normal in small VSD.
• ECG — normal (small); left or biventricular hypertrophy (large); right ventricular hypertrophy suggests pulmonary hypertension.
• Echocardiography — the investigation of choice; confirms the site, size, shunt direction and haemodynamic effects.
• Cardiac catheterisation — to assess PVR and reversibility in advanced pulmonary hypertension.

Management

• Small VSD: conservative — most close spontaneously; reassurance, follow-up and maintaining good dental/oral hygiene.
• Large VSD with heart failure: anti-failure treatment — diuretics (furosemide), ACE inhibitors, and sometimes digoxin — plus nutritional support (high-calorie feeds) for catch-up growth.
• Definitive: surgical (or device) closure for a large shunt, failure to thrive despite medical therapy, or rising pulmonary pressures — done before irreversible pulmonary vascular disease develops.
• Treat and prevent chest infections; ensure immunisation.

Complications

• Congestive heart failure and recurrent respiratory infections in infancy.
• Pulmonary arterial hypertension → Eisenmenger syndrome (shunt reversal, cyanosis — then inoperable).
• Infective endocarditis; aortic regurgitation (with outlet defects); growth failure.

Prognosis

• Small VSDs have an excellent prognosis and often close on their own.
• Large defects, if corrected early, do well; if left untreated they lead to heart failure and, eventually, irreversible Eisenmenger physiology — hence the importance of timely diagnosis and surgery.

Spectrum BY Size

Differential Diagnosis of a Pansystolic Murmur

• Mitral regurgitation (apical, radiating to axilla), tricuspid regurgitation.
• The VSD murmur is loudest at the left lower sternal border and is harsh.

Associated Conditions

VSD may be isolated or part of syndromes (e.g. Down syndrome — AV-canal type) and complex lesions (Tetralogy of Fallot, truncus arteriosus).

Infective Endocarditis Prophylaxis

Good oral/dental hygiene is essential; antibiotic prophylaxis before certain procedures is reserved for high-risk situations as per current guidelines.

Eisenmenger Syndrome (the Feared End-stage)

• A large, uncorrected VSD keeps the pulmonary arteries exposed to high pressure & flow, causing irreversible pulmonary vascular disease.
• Pulmonary pressure eventually exceeds systemic pressure and the shunt reverses to right-to-left — the child becomes cyanosed and inoperable.
• This is why large shunts must be closed early.

Clinical Monitoring

• Track growth, feeding, respiratory infections and signs of heart failure.
• Serial echocardiography for shunt size and pulmonary pressures; refer for closure before pulmonary vascular disease sets in.

Definition

• Tetralogy of Fallot (TOF) is the commonest cyanotic congenital heart disease beyond infancy.
• It is a right-to-left shunt lesion resulting from a single developmental abnormality — anterior deviation of the infundibular septum — that produces four components.

The Four Components

• Ventricular Septal Defect (VSD) — large.
• Overriding of the aorta — the aorta sits over the VSD.
• Pulmonary stenosis / RV outflow obstruction — this determines the severity.
• Right Ventricular Hypertrophy (RVH) — a consequence of the outflow obstruction.

Haemodynamics

RV outflow obstruction raises RV pressure → Deoxygenated blood shunts R → L across the VSD into the aorta → Reduced pulmonary blood flow + systemic desaturation → Cyanosis, clubbing and polycythaemia

Clinical Features

• Central cyanosis — onset and severity depend on the degree of pulmonary stenosis (often after the neonatal period).
• Clubbing of the fingers and toes; dyspnoea on exertion; failure to thrive.
• Squatting after exertion (increases systemic vascular resistance → reduces the right-to-left shunt → improves pulmonary flow).
• Hypercyanotic ('Tet') spells — paroxysmal deep cyanosis with hyperpnoea.
• Signs — an ejection systolic murmur of pulmonary stenosis at the left upper sternal border, and a single second heart sound.

Investigations

• Chest X-ray — a 'boot-shaped' heart (coeur en sabot) with an uplifted apex and a concave pulmonary bay; oligaemic (dark) lung fields; a right-sided aortic arch in ~25%.
• ECG — right ventricular hypertrophy and right axis deviation.
• Echocardiography — diagnostic; defines all four components and the RV outflow anatomy.
• Investigations for polycythaemia (raised haematocrit) and its effects.

Management — Hypercyanotic Spell (acute)

• Knee-chest position (or hold the infant with knees to chest) — increases systemic resistance and venous return.
• Oxygen; morphine (calms hyperpnoea); IV fluids (volume).
• Beta-blocker (propranolol/esmolol) to relax the infundibular spasm; phenylephrine to raise systemic resistance; sodium bicarbonate for acidosis.

Management — Definitive & Preventive

• Oral propranolol prophylaxis to reduce the frequency of spells while awaiting surgery.
• Maintain hydration; treat anaemia (iron) as relative anaemia worsens spells.
• Surgery: a palliative Blalock-Taussig shunt in very small/symptomatic infants, and total intracardiac correction (VSD closure + relief of RV outflow obstruction) as the definitive treatment.

Complications

• Hypercyanotic spells; cerebral thrombosis (from polycythaemia) and brain abscess.
• Infective endocarditis; growth failure; and complications of chronic hypoxia.

Spectrum of Severity

• 'Pink' TOF — mild pulmonary stenosis, minimal right-to-left shunt, little/no cyanosis (behaves like a VSD).
• Classic cyanotic TOF — moderate–severe stenosis with cyanosis.
• TOF with pulmonary atresia — the most severe, duct-dependent form.

Differential Diagnosis of a Cyanotic Newborn/child (the '5 TS')

• Tetralogy of Fallot, Transposition of great arteries, Truncus arteriosus.
• Tricuspid atresia, Total anomalous pulmonary venous connection.
• TOF is distinguished by the boot-shaped heart, oligaemic lungs and the ejection systolic murmur.

WHY Squatting Helps

• Squatting kinks the femoral arteries and raises systemic vascular resistance, which reduces the right-to-left shunt and forces more blood through the lungs — relieving cyanosis.
• It is a characteristic self-protective manoeuvre in older children with TOF.

Prognosis

• Untreated TOF carries significant mortality from spells, hypoxia and complications.
• With modern surgery (total correction, usually in infancy) the outlook is excellent, though lifelong cardiology follow-up is needed for residual lesions and arrhythmias.

Associated Anomalies

• A right-sided aortic arch (~25%); atrial septal defect ('pentalogy of Fallot').
• Association with 22q11 deletion (DiGeorge) syndrome — screen for it.

Principles of Chronic Care

• Maintain hydration and treat anaemia (iron) — a relatively low haemoglobin worsens tissue hypoxia and spells.
• Prevent dehydration (fever, diarrhoea) which increases the risk of spells and cerebral thrombosis; ensure good dental hygiene.

Definition

• Acute Rheumatic Fever is a delayed, immune-mediated, multisystem inflammatory disease that follows an untreated Group A streptococcal (gas) throat infection.
• It affects the heart, joints, brain, skin and subcutaneous tissue, and is the commonest cause of acquired heart disease in children (age 5–15 years) in developing countries.

Pathogenesis

• It follows gas pharyngitis (not skin infection) after a latent period of ~2–3 weeks.
• Molecular mimicry — antibodies against streptococcal M-protein cross-react with the body's own tissues (heart, joints, brain), causing inflammation.
• The heart shows a pancarditis with characteristic Aschoff bodies on histology.

Modified Jones Criteria (2015) for Diagnosis

Diagnosis needs evidence of a preceding gas infection plus either 2 major, OR 1 major + 2 minor criteria.

Evidence of preceding gas: raised or rising ASO / anti-DNase B titre, a positive throat culture / rapid antigen test, or recent scarlet fever.

Key Clinical Features

• Carditis — the most serious feature; a pancarditis, with the mitral valve most affected (then aortic) → new murmurs (mitral/aortic regurgitation), cardiomegaly, heart failure.
• Arthritis — migratory, asymmetric polyarthritis of large joints; dramatically responsive to aspirin.
• Sydenham chorea — involuntary, purposeless movements, emotional lability (a late feature).
• Erythema marginatum — a transient, non-itchy rash with serpiginous margins on the trunk.
• Subcutaneous nodules — painless, firm nodules over extensor surfaces (associated with severe carditis).

Investigations

• Evidence of gas — ASO titre, anti-DNase B, throat swab.
• Acute-phase reactants — raised ESR and CRP; leukocytosis.
• ECG — prolonged PR interval (first-degree heart block).
• Echocardiography — detects valvular regurgitation (including subclinical carditis) and pericardial effusion.

Management

• Eradicate the streptococcus — a single dose of IM benzathine penicillin (or a 10-day oral penicillin course); erythromycin if allergic.
• Anti-inflammatory — aspirin for arthritis/mild carditis; corticosteroids (prednisolone) for severe carditis with heart failure.
• Sydenham chorea — rest, a calm environment, and haloperidol/sodium valproate/carbamazepine if severe.
• Bed rest and treatment of heart failure as needed.

Prevention

• Primary prevention — prompt treatment of streptococcal sore throat with penicillin.
• Secondary prophylaxis — benzathine penicillin IM every 3–4 weeks to prevent recurrences; the duration depends on the presence and severity of carditis (from 5 years/up to 21 years of age, up to lifelong with valve damage).

Epidemiology

• Peak age 5–15 years; associated with poverty, overcrowding and untreated streptococcal throat infections.
• Still common in developing countries; the leading cause of acquired heart disease in the young.

Detailed Features of Arthritis & Chorea

• Arthritis — flitting/migratory, affecting large joints (knees, ankles, elbows, wrists) one after another; each joint is inflamed for a few days; it is very responsive to salicylates and leaves no deformity.
• Sydenham chorea — appears late (months after the sore throat); purposeless movements, muscular incoordination, emotional lability and 'milkmaid's grip'; may occur alone.

Differential Diagnosis

• Juvenile idiopathic arthritis, septic/reactive arthritis, and other connective-tissue diseases (for the arthritis).
• Viral myocarditis and congenital/other acquired heart disease (for the carditis).

Complications & Prognosis

• The joints, skin and brain features resolve completely, but carditis can cause permanent valve damage (RHD).
• Recurrences (each risking more valve damage) are prevented by secondary prophylaxis — hence its lifelong importance in those with carditis.

Supportive Care & Follow-up

• Bed rest during the acute phase, graded as carditis improves; treat heart failure.
• Regular follow-up to monitor for evolving valve disease and to ensure adherence to secondary prophylaxis.

Role of Echocardiography

Echocardiography detects subclinical carditis (valvular regurgitation not audible clinically), which is now accepted as a major criterion — it is essential in every suspected case.

Definition

• Congestive cardiac failure (CCF) is a clinical syndrome in which the heart is unable to pump enough blood to meet the body's metabolic demands, or can do so only at the cost of raised filling pressures.
• In children its presentation and causes differ significantly from adults.

Causes (BY Age — a Useful Framework)

• Neonate: duct-dependent lesions — hypoplastic left heart, critical coarctation of the aorta, critical aortic stenosis, TGA; also birth asphyxia and severe anaemia.
• Infant: large left-to-right shunts — large VSD, PDA, AV canal defect (as PVR falls); supraventricular tachycardia.
• Older child: rheumatic heart disease, myocarditis, cardiomyopathy, infective endocarditis, arrhythmias, and cor pulmonale.
• Non-cardiac — severe anaemia, sepsis, acute nephritis (fluid overload), thyrotoxicosis.

Clinical Features

The three groups of signs — of impaired myocardial performance, pulmonary congestion (left heart) and systemic congestion (right heart):

• Impaired performance / adrenergic: tachycardia, gallop rhythm, sweating, poor feeding, cold peripheries, cardiomegaly and failure to thrive.
• Pulmonary congestion (left heart): tachypnoea, respiratory distress, feeding difficulty, recurrent chest infections and basal crepitations/wheeze.
• Systemic congestion (right heart): tender hepatomegaly (the most reliable sign in infants), raised JVP (hard to see in infants), and periorbital/facial puffiness (dependent oedema is uncommon in infants).

Investigations

• Chest X-ray — cardiomegaly (cardiothoracic ratio > 0.55–0.6 in infants) and pulmonary venous congestion.
• ECG — chamber hypertrophy, arrhythmia, or ischaemic/myocarditic changes.
• Echocardiography — identifies the structural cause and assesses ventricular function.
• Supportive — CBC (anaemia), electrolytes, renal & thyroid function, and blood gas.

Management — General Measures

• Nurse propped up; ensure rest; give oxygen for distress/hypoxia.
• Salt and judicious fluid restriction; correct anaemia, infection and electrolyte disturbances.
• Nutritional support — energy-dense feeds (small, frequent; NG feeds if tiring).

Management — Drug Therapy

• Diuretics — furosemide (± spironolactone) to relieve congestion (first-line).
• ACE inhibitors — enalapril/captopril reduce afterload (especially for left-to-right shunts and cardiomyopathy).
• Digoxin — improves contractility in selected cases.
• Beta-blockers (carvedilol) in chronic cardiomyopathy once stable; inotropes (dopamine/dobutamine/milrinone) in decompensated/acute failure.

Treating the Cause

• Definitive treatment addresses the underlying problem — surgical/device closure of shunts, valve treatment for RHD, correction of arrhythmias, and treatment of anaemia or nephritis.
• Medical therapy controls symptoms while the cause is addressed.

Compensatory Mechanisms (and WHY They Eventually Fail)

• Sympathetic activation → tachycardia and vasoconstriction (maintains BP but increases cardiac workload).
• Renin-angiotensin-aldosterone activation → salt & water retention (raises preload but causes congestion).
• Ventricular hypertrophy/dilatation → initially helps, later worsens function.
• These mechanisms account for the clinical signs and are the targets of drug therapy (diuretics, ACE inhibitors, beta-blockers).

Grading — Modified Ross Classification (infants)

• Class I: asymptomatic.
• Class II: mild tachypnoea/sweating with feeds.
• Class III: marked tachypnoea/sweating with feeds; prolonged feeding time; failure to thrive.
• Class IV: symptoms (tachypnoea, retractions, grunting) at rest.

Differential Diagnosis

Respiratory causes of tachypnoea (pneumonia, bronchiolitis), sepsis, and metabolic acidosis can mimic heart failure — the presence of cardiomegaly and hepatomegaly and an abnormal echocardiogram point to a cardiac cause.

Monitoring & Prognosis

• Monitor weight, feeding, respiratory rate, liver size and urine output.
• Prognosis depends on the underlying cause — excellent when a correctable lesion (shunt, arrhythmia, anaemia) is treated, guarded in cardiomyopathy.

Acute Decompensated Heart Failure

• Oxygen, prop-up position, and IV furosemide for congestion.
• IV inotropes (dopamine/dobutamine/milrinone) for poor perfusion; correct acidosis, arrhythmia and precipitating factors.
• Ventilatory support if in respiratory failure; urgent treatment of the reversible cause.

Prevention

Early detection and correction of congenital lesions, prevention of rheumatic fever, prompt treatment of anaemia and infections, and immunisation all reduce the burden of childhood heart failure.

Definition

• Kawasaki disease is an acute, self-limiting medium-vessel vasculitis of young children (usually < 5 years), of unknown cause.
• Its importance lies in its predilection for the coronary arteries — it is a leading cause of acquired heart disease in children in developed countries.

Etiology & Pathogenesis

• The cause is unknown; an abnormal immune response to an infectious trigger in a genetically predisposed child is proposed.
• There is a generalised vasculitis of medium-sized arteries, with a special tendency to involve the coronary arteries → aneurysm formation.

Diagnostic Criteria (clinical)

Diagnosis requires fever for ≥ 5 days plus at least 4 of the following 5 features (mnemonic — crash and burn):

Clinical Course (phases)

• Acute (1–2 weeks): high fever and the diagnostic features; the child is very irritable.
• Subacute (2–4 weeks): fever settles; desquamation, thrombocytosis and the peak risk of coronary artery aneurysms.
• Convalescent: clinical recovery; inflammatory markers normalise.

Investigations

• Raised inflammatory markers — high ESR and CRP; neutrophilic leukocytosis.
• Thrombocytosis (a very high platelet count) in the second week (characteristic).
• Anaemia; sterile pyuria; raised transaminases; hyponatraemia.
• Echocardiography — at diagnosis and follow-up, to detect coronary artery aneurysms (the key complication).

Management

• Intravenous immunoglobulin (IVIG) 2 g/kg as a single infusion — given within the first 10 days; it markedly reduces the risk of coronary aneurysms.
• Aspirin — high (anti-inflammatory) dose in the acute phase, then low (anti-platelet) dose until inflammation and platelets normalise.
• IVIG-resistant cases — a second dose of IVIG, corticosteroids, or infliximab.
• Long-term cardiology follow-up (with antiplatelet/anticoagulation) if aneurysms develop.

Complications

• Coronary artery aneurysms — the major complication (→ thrombosis, myocardial infarction, sudden death).
• Myocarditis, pericarditis, arrhythmias; and (rarely) arterial aneurysms elsewhere.

Differential Diagnosis

• Viral exanthems (measles, adenovirus), scarlet fever, and drug reactions (Stevens-Johnson).
• Toxic shock syndrome, juvenile idiopathic arthritis (systemic), and staphylococcal scalded skin syndrome.
• The persistent high fever + coronary risk distinguish Kawasaki and mandate prompt treatment.

Incomplete (atypical) Kawasaki Disease

• Some children — especially infants < 6 months — have prolonged fever with fewer than 4 features.
• Because they are at high risk of coronary aneurysms, the diagnosis is supported by raised inflammatory markers and echocardiographic changes, and they are treated even without the full criteria.

Risk Factors for Coronary Involvement

• Young age (< 1 year); prolonged fever; delayed or no IVIG treatment; and IVIG resistance.
• Persistently high inflammatory markers.

Follow-up & Prognosis

With timely IVIG the great majority recover fully. Children who develop coronary aneurysms need long-term cardiology follow-up with antiplatelet/anticoagulant therapy and surveillance for ischaemia.

Aspirin — Cautions

• High-dose aspirin is used despite the usual paediatric caution (Reye syndrome risk), because the benefit in Kawasaki outweighs the risk.
• Watch for and avoid concurrent varicella/influenza; continue low-dose aspirin until inflammation and platelets normalise (or long-term if aneurysms persist).

Key Learning Points

• Suspect Kawasaki in any child with fever ≥ 5 days and mucocutaneous signs.
• IVIG within 10 days is the single most important step to protect the coronaries; always do an echocardiogram.

Definition

• Coeliac disease is a chronic, immune-mediated systemic disorder triggered by dietary gluten (present in wheat, barley and rye) in genetically susceptible individuals.
• It is characterised by a small-intestinal enteropathy (villous atrophy) leading to malabsorption, and it improves on a gluten-free diet.

Etiology & Pathogenesis

• Genetic susceptibility — strong association with HLA-DQ2 and HLA-DQ8.
• The trigger is gliadin (a gluten fraction); the enzyme tissue transglutaminase (tTG) modifies it, provoking a T-cell-mediated immune response.
• This causes villous atrophy, crypt hyperplasia and intraepithelial lymphocytosis → reduced absorptive surface → malabsorption.

Clinical Features

• Classic (GI) form — appears months after gluten is introduced (6 months–2 years): chronic diarrhoea, steatorrhoea (bulky, pale, offensive stools), abdominal distension, failure to thrive, irritability and wasting of the buttocks and limbs.
• Non-classic / extra-intestinal — iron-deficiency anaemia unresponsive to iron, short stature, delayed puberty, rickets/osteopenia, dental enamel defects.
• Dermatitis herpetiformis — an itchy, blistering rash (the skin manifestation).
• Associations — type 1 diabetes, autoimmune thyroiditis, Down syndrome, selective IgA deficiency.

Investigations

• Serology (first-line) — IgA anti-tissue transglutaminase (anti-tTG) antibody with a total serum IgA (to exclude IgA deficiency); IgA anti-endomysial antibody (EMA) is highly specific.
• Duodenal biopsy — the confirmatory test; shows villous atrophy, crypt hyperplasia and raised intraepithelial lymphocytes (graded by the Marsh classification).
• HLA-DQ2/DQ8 typing — a negative result largely excludes the disease.
• Supportive — CBC (anaemia), iron/folate, calcium, vitamin D.

Management

• Lifelong strict gluten-free diet — avoid wheat, barley and rye; rice, maize, millets (ragi, jowar, bajra) and potato are safe.
• Correct deficiencies — iron, folate, calcium and vitamin D.
• Dietitian support and family education; monitor symptoms, growth and falling antibody titres as markers of adherence.
• Screen for associated autoimmune conditions.

Complications

• Persistent anaemia, osteoporosis, short stature and delayed puberty; infertility later.
• Refractory disease and (in long-standing untreated adults) small-bowel lymphoma.
• Coeliac crisis — a severe acute presentation with dehydration and electrolyte disturbance.

Epidemiology

• Prevalence ~1% and increasingly recognised; the majority remain undiagnosed (the 'coeliac iceberg').
• Higher in first-degree relatives and in certain autoimmune/genetic conditions.

Clinical Spectrum (the Iceberg)

• Classic — the malabsorptive GI picture described above.
• Non-classic/atypical — extra-intestinal features (anaemia, short stature, arthralgia) with few GI symptoms.
• Silent — asymptomatic but positive serology and biopsy (found on screening).
• Potential — positive serology with a currently normal biopsy.

Differential Diagnosis

• Other causes of chronic diarrhoea & failure to thrive — cystic fibrosis, giardiasis, cow-milk protein enteropathy, tropical sprue, post-enteritis syndrome.
• Serology + biopsy distinguish coeliac disease from these.

WHO to Screen (high-risk Groups)

• First-degree relatives of coeliac patients.
• Type 1 diabetes, autoimmune thyroiditis, Down syndrome, Turner syndrome, selective IgA deficiency.

Monitoring & Follow-up

• Track symptom resolution, catch-up growth and a fall in anti-tTG titres as a marker of dietary adherence.
• Regular dietitian review; screen for and correct deficiencies (iron, calcium, vitamin D).

Prognosis

• With a strict, lifelong gluten-free diet the prognosis is excellent — symptoms resolve, the mucosa heals and growth normalises.
• Poor adherence causes ongoing mucosal damage, persistent deficiencies and the long-term risk of osteoporosis and malignancy.

The Gluten-free Diet in Practice

Oats are usually tolerated but risk cross-contamination; careful label-reading is essential.

Definition

• Neonatal cholestasis is conjugated (direct) hyperbilirubinaemia in early infancy — defined as a direct bilirubin > 1 mg/dL (when total < 5) or > 20% of the total bilirubin.
• It always reflects hepatobiliary disease and, unlike physiological jaundice, is pathological and needs urgent evaluation.

Causes

• Obstructive/surgical — biliary atresia (the commonest surgical cause), choledochal cyst.
• Hepatocellular/'neonatal hepatitis' — idiopathic, infections (torch, hepatitis, sepsis, UTI).
• Metabolic — galactosaemia, tyrosinaemia, alpha-1-antitrypsin deficiency, hypothyroidism.
• Genetic/other — Alagille syndrome, progressive familial intrahepatic cholestasis, TPN-associated.

Biliary Atresia

A progressive, inflammatory obliteration of the extrahepatic bile ducts of unknown cause, presenting in the first weeks of life; untreated, it leads to biliary cirrhosis and death.

• Clinical triad — persistent jaundice, pale/clay-coloured stools and dark urine, with hepatomegaly (later splenomegaly).
• The baby is often otherwise well and thriving initially, which can delay recognition.

Clinical Evaluation

• Assess the stool colour (persistently pale stools strongly suggest biliary obstruction) and urine colour.
• Examine for hepatomegaly, splenomegaly, ascites and dysmorphism (Alagille); note the general condition (sick → sepsis/metabolic).
• Ask about consanguinity, family history and the antenatal/birth history.

Investigations

• Fractionated bilirubin (conjugated raised); liver function tests including GGT.
• Ultrasound abdomen — absent/contracted gallbladder and the 'triangular cord sign' suggest biliary atresia; detects a choledochal cyst.
• HIDA (hepatobiliary) scan — no excretion of tracer into the gut suggests biliary atresia.
• Liver biopsy — bile-duct proliferation and bile plugs favour biliary atresia.
• Metabolic & infection screen — galactosaemia (urine reducing substances), torch, thyroid, alpha-1-antitrypsin.

Management

• Biliary atresia — Kasai portoenterostomy, ideally performed before 8 weeks (60 days) of age; results are far better the earlier it is done.
• Liver transplantation — for failed Kasai or end-stage liver disease.
• Treat specific causes (galactose-free diet in galactosaemia, thyroxine in hypothyroidism, antibiotics for sepsis/UTI).
• Supportive — fat-soluble vitamins (A, D, E, K), MCT-based nutrition for catch-up growth, ursodeoxycholic acid.

Step-wise Diagnostic Approach

• Step 1 — confirm cholestasis by fractionating the bilirubin (raised conjugated fraction).
• Step 2 — decide 'sick' vs 'well': a sick baby suggests sepsis, galactosaemia or a metabolic crisis needing urgent treatment.
• Step 3 — assess stool colour and do targeted tests (USG, HIDA, biopsy) to identify/exclude biliary atresia (time-critical).
• Step 4 — pursue metabolic, infective and genetic causes in parallel.

Biliary Atresia VS Neonatal Hepatitis

Complications

• Progressive biliary cirrhosis and portal hypertension if biliary atresia is untreated.
• Fat-soluble vitamin deficiency (A, D, E, K) — including vitamin-K-dependent bleeding.
• Failure to thrive, pruritus and (in the underlying cause) metabolic decompensation.

Prognosis

• Outcome in biliary atresia depends heavily on the age at Kasai surgery — bile drainage is achieved in most when operated before 60 days, and in few when delayed.
• Even after a successful Kasai, many children eventually require liver transplantation.

Supportive Management