Test Code SRA2 Serotonin Release Assay (SRA), Unfractionated Heparin
Additional Codes
Epic: LAB3365
Quest: 14627
Specimen Required
Specimen Type: Serum
Collection Container/Type
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Specimen Minimum Volume
0.4 mL
Specimen Stability
Room temperature: 24 hours
Refrigerated: 48 hours
Frozen: 6 months
Reference Range
See Laboratory Report
Rejection Due To
Received room temperature • Received refrigerated
Day(s) and Time(s) Performed
Sun-Fri a.m.
Report Available
1 day
Clinical Significance
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).
Method Name
Radiobinding 14C Serotonin Radiolabel
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
CPT Code(s)
86022
Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153