Describe Extubation in detail.

Definition & Criteria

Extubation is the removal of the tracheal tube at the end of anaesthesia. It is a high-risk period (comparable to induction) and is performed only when the patient can protect and maintain their own airway. Criteria include adequate reversal of muscle relaxation (sustained head-lift, adequate tidal volume), return of protective airway reflexes, adequate oxygenation and spontaneous ventilation, and the patient being either fully awake or (in a planned ‘deep’ extubation) adequately deep.

Technique & Complications

The airway is suctioned, the patient pre-oxygenated, the cuff deflated and the tube removed, usually with the patient awake (safer where aspiration is a risk). Complications include laryngospasm, airway obstruction, aspiration, coughing/hypertension, desaturation, and — in children — post-extubation croup (subglottic oedema).

Awake Versus Deep Extubation

The choice between an awake and a deep extubation balances competing risks: awake extubation, once protective reflexes have returned, is safest where aspiration is a concern and is the rule for the full-stomach or difficult airway, but it is associated with more coughing and haemodynamic disturbance; deep extubation, performed while the patient is still adequately anaesthetised, produces a smoother emergence and is sometimes chosen (for example where coughing is undesirable) but leaves the airway unprotected until reflexes return. Whichever is chosen, the intermediate light plane is avoided, and equipment for reintubation is kept ready.

Extubation carries risks comparable to intubation.

• Extubation = removing the tube; a high-risk period like induction.
• Criteria: reversed relaxation (head-lift, tidal volume), airway reflexes, adequate oxygenation/ventilation.
• Suction, preoxygenate, deflate cuff, remove — awake in aspiration-risk patients.
• Complications: laryngospasm, obstruction, aspiration, desaturation, paediatric croup.