Test Code SRA2 Serotonin Release Assay (SRA), Unfractionated Heparin
Specimen Required
1 mL frozen serum
Specimen Minimum Volume
0.4 mL
Specimen Stability
Room temperature: 24 hours Refrigerated: 48 hours Frozen: 6 months
Rejection Due To
Received room temperature • Received refrigerated
Day(s) and Time(s) Performed
Set up: Sun-Fri a.m.; Report available: 1 day
Method Name
Radiobinding 14C Serotonin Radiolabel
Collection Container / Tube
Preferred:
Other Acceptable Container:
Transport Container
Plastic screw-cap vial
Transport / Storage Conditions
Frozen
Reference Values
See Laboratory Report
CPT Codes
86022
Clinical Reference
Any patient with an unexplained fall in the platelet count of >40% during or after cessation of heparin therapy should be suspected of heparin-induced thrombocytopenia (HIT).