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Anaesthesia · Complications and emergencies: follow-up after perioperative anaphylaxis
Sample itemA patient recovers from a suspected anaphylactic reaction at induction of anaesthesia. What follow-up is advised before any further anaesthetic?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
C. Allergy clinic skin testing at about 4 to 6 weeks
After anaphylaxis, the trigger should be identified so that safe agents can be chosen in future. Patients are referred to an allergy clinic for skin prick and intradermal testing, usually four to six weeks after the event, once mast cells have recovered. Serum tryptase taken in the first hours supports the diagnosis.
Option by option
A. Test doses of each drug in theatre, with adrenaline ready
Deliberate re-exposure in theatre risks another life-threatening reaction and is not a diagnostic test.
B. Serum IgG levels measured against every drug used
IgG levels do not reflect the IgE-mediated or direct mast cell mechanisms of anaphylaxis.
C. Allergy clinic skin testing at about 4 to 6 weeks (correct)
Correct. Specialist allergy testing after a delay of several weeks identifies the culprit and allows safe future anaesthesia.
D. Lifelong avoidance of every general anaesthetic agent
Blanket avoidance is unnecessary; most agents are safe once the cause is identified.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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