[Value of in-vitro diagnostic tools after anaphylaxis].

Anaphylaxis is a potentially life-threatening reaction and should be treated immediately. Diagnosis is made based on history and clinical features. However, measurement of sequential serum tryptase can provide additional clues and should be performed soon as possible. Referral to specialist allergy service is believed to reduce rate of recurrence. New specific in vitro techniques to indentify the triggering agent help optimize secondary preventive measures. Thus in vitro diagnosis plays an important, albeit complementary, role both in the acute and secondary phases facilitating a safe diagnosis and aiding in the overall management of the disease.