Separated serum can be stored at 4oC for 48 hours for transport between labs. For longer periods samples must be frozen and transported frozen.
The sample should be collected between 15 minutes and 3 hours after the suspected anaphylactic event. Increased levels of Tryptase can normally be detected up to 3 to 6 hours after the anaphylactic reaction. Levels return to normal within 12—14 hours after release.
This test can be performed on patient that do not have allergies.
aliquot and freeze without delay.