Anaphylaxis during anaesthesia

Because an anaesthetised person cannot describe itching, throat tightness, or dizziness, clinicians may first notice an unexpected fall in blood pressure, difficulty moving air through the lungs, swelling, or skin changes.

Several medicines and materials may be introduced close together around anaesthesia. Possible triggers include antibiotics, muscle-relaxing medicines, antiseptics, latex, and other agents used during the procedure; the timing record helps specialists narrow the possibilities later.

Some changes can resemble other anaesthetic complications. The team assesses the whole pattern, including airway pressure, oxygenation, circulation, skin findings, and when each exposure occurred.

The anaesthesia team stops suspected triggers where possible, gives adrenaline, delivers oxygen, supports the airway, and provides intravenous fluids and further medicines according to the response. The planned procedure may be paused or stopped while the emergency is managed.

After stabilisation, staff document every medicine and material used, their timing, the clinical signs, and the treatment given. Blood samples may be collected at specific times to support later assessment, but no single result identifies every trigger by itself.

Continued monitoring is needed after a suspected reaction because breathing or circulation problems can persist or return. Once awake, report renewed wheezing, throat or tongue swelling, faintness, widespread hives, or vomiting immediately to staff.

Before leaving hospital, obtain a clear written account of the suspected reaction and instructions about which agents to avoid until specialist evaluation. Share that document with any clinician planning future anaesthesia.

Ask which exposures are under suspicion, whether an allergy specialist should arrange targeted testing, and how alternatives will be selected. Confirm that the reaction is entered prominently in your medical record and that the next anaesthesia team will receive the investigation findings.