SN7 SHORT NOTE 5M

Describe Autologous Transfusion & Cell Salvage in detail.

General Surgery · Final Professional

Definition

Autologous transfusion is the transfusion of a patient’s own blood rather than donor (allogeneic) blood, avoiding the risks of incompatibility, immune reactions and transfusion-transmitted infection. It can be done by preoperative donation, acute normovolaemic haemodilution, or — most commonly now — intraoperative cell salvage.

Cell Salvage

Cell salvage collects blood lost during surgery, washes and concentrates the red cells, and returns them to the patient. It is valuable in operations with significant blood loss (major orthopaedic, vascular, cardiac, obstetric) and for patients who decline donor blood (e.g. Some Jehovah’s Witnesses, within their wishes). It is avoided or used cautiously where the blood is contaminated (e.g. By infection or malignant cells, though filters are used).

CLINICAL PEARL

Cell salvage — collecting, washing and returning the patient’s own shed blood — is the main autologous technique, reducing donor-blood use in high-blood-loss surgery and helpful for patients who decline allogeneic blood.

Contraindications & Considerations

Autologous techniques are not suitable in every situation: intraoperative cell salvage is traditionally cautioned against where the operative field is contaminated by infection or by malignant cells, and in obstetric surgery because of amniotic fluid, although leucocyte-depletion filters and careful technique have extended its use into some of these settings. Preoperative autologous donation, once popular, has declined because it commits the patient to donation, can leave them anaemic before surgery and wastes units that are not used, so the emphasis has shifted towards cell salvage and towards reducing the need for transfusion at all through good patient blood management.

CLINICAL PEARL

Think of autologous transfusion as ‘the patient’s own blood’, its main modern form being intraoperative cell salvage, which reduces reliance on donor blood in high-blood-loss surgery and suits patients who decline allogeneic transfusion.

In Brief

In short, cell salvage returns the patient’s own washed red cells and is the mainstay of autologous practice today.

Contraindicated where malignancy or infection contaminates the field.

KEY POINT

Key points TO remember

Autologous transfusion = the patient’s own blood (avoids incompatibility, immune reactions, infection).
Methods: preoperative donation, acute normovolaemic haemodilution, intraoperative cell salvage.
Cell salvage: collect, wash, concentrate & return shed red cells — for high-blood-loss surgery.
Useful for patients declining donor blood; cautious use with infected/malignant fields.

EXAM TIP

Sources: Morgan & Mikhail’s Clinical Anesthesiology; Miller’s Anesthesia; Ajay Yadav’s Short Textbook of Anaesthesia.

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