From: World Allergy Organization Guidelines for the Assessment and Management of Anaphylaxis
Total tryptase (pro, pro', and mature forms of alpha/beta tryptases) |
   Obtain blood sample within 15 minutes to 3 hours of symptom onseta, b |
   Consider measuring levels in accurately timed serial blood samples during the anaphylactic episode |
   Consider comparing levels measured during the episode with a baseline levelc, d |
Histamine |
   Obtain blood sample within 15 minutes to 1 hour of symptom onseta |
   Special handling of the blood sample is required (use wide-bore needle, keep sample at 4°C and centrifuge it promptly, freeze plasma promptly) |
   Measure histamine and its metabolite N-methylhistamine in a 24-hour urine sample |
Othere |