Yale New Haven Hospital

Department of Laboratory Medicine
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Tryptase

Lab Section: 

Immunology

 

Lab Location: 

Main Lab

Test ID: 

LAB827

 

Methodology: 

Fluorescence Enzyme Immunoassay (FEIA)

Schedule: 

Wednesday

Reported: 

7 days

Specimen Requirements: 

Collection: 5.0 mL Blood in a Gold Top Tube.
Pediatric volume: 3 mL.
Unacceptable conditions: Grossly hemolyzed specimens
Stability: After separation from cells: Ambient: 2 days; Refrigerated: 7 days; Frozen: 28 days

 

Notes: 

Clinical Indications: Aids in the clinical diagnosis of patients with a suspicion of systemic mastocytosis in conjunction with other clinical findings. For assessing mast cell activation which may occur as a result of anaphylaxis or allergen challenge, samples should be taken between 15 minutes and 3 hours after the event suspected of causing mast cell activation. Increased levels of tryptase can usually be detected for up to 3-6 hours after the reaction. They return to normal within 12-14 hours after release.

Reference Interval: 

<11.0 ug/L

CPT Code(s): 

83520

Last Changed: 

12/17/2016 17:06:44

Last Reviewed: 

8/16/2017 2:47:40 PM