Skip Ribbon Commands
Skip to main content
Navigate Up
Search
Test Code
Search
Laboratory Section
Test Category
Browse By Test Name
# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Serotonin Release Assay, Unfract Heparin (5508)
Test Code: SERRASO
Synonyms/Keywords
​Ref Lab Code: 5508, SRA, SRA-UFH, SRA-unfractionated heparin, SRA-Porcine Heparin.
Useful For
​Immune Thrombocytopenias
Specimen Requirements
Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​Serum ​Red Top Tube (RTT) ​5 mL ​1 mL
Collection Processing Instructions

​Sample should be spun down and taken off the clot.  Sample must be received within 7 days of draw date.  Older samples are acceptable if they have been frozen. Submit refrigerated.  If already frozen, send on dry ice.

If a SERRASO is reflexed from HITDC test, Pathologist approval is not needed.

Specimen Stability Information
Specimen Type Temperature Time
​Serum ​ ​ ​Refrigerated ​< 7 days
​Frozen @ -20°C    14 days​
Frozen @ -80°C  6 months​
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Blood Center of Wisconsin Monday through Saturday​ ​2-4 days ​Serotonin Release Assay (SRA)
Reference Lab
Test Information
Test includes heparin dependent platelet antibody serotonin release assay for unfractionated heparin. This test is used for the detection of heparin-dependent antibodies in heparin induced thrombocytopenia (HIT). Because of its high specificity, the SRA is often useful for confrimation of weak or 'inconclusive' results obtained with the highly sensitive PF4/ELISA. ​
Reference Range Information
Results are interpreted as negative, borderline positive, or positive.
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
86022​
Synonyms/Keywords
​Ref Lab Code: 5508, SRA, SRA-UFH, SRA-unfractionated heparin, SRA-Porcine Heparin.
Ordering Applications
Ordering Application Description
​Centricity ​Serotonin Release Assay (5508)
​Cerner Serotonin Release Assay (5508)​
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​Serum ​Red Top Tube (RTT) ​5 mL ​1 mL
Collection Processing Instructions

​Sample should be spun down and taken off the clot.  Sample must be received within 7 days of draw date.  Older samples are acceptable if they have been frozen. Submit refrigerated.  If already frozen, send on dry ice.

If a SERRASO is reflexed from HITDC test, Pathologist approval is not needed.

Specimen Stability Information
Specimen Type Temperature Time
​Serum ​ ​ ​Refrigerated ​< 7 days
​Frozen @ -20°C    14 days​
Frozen @ -80°C  6 months​
Useful For
​Immune Thrombocytopenias
Test Information
Test includes heparin dependent platelet antibody serotonin release assay for unfractionated heparin. This test is used for the detection of heparin-dependent antibodies in heparin induced thrombocytopenia (HIT). Because of its high specificity, the SRA is often useful for confrimation of weak or 'inconclusive' results obtained with the highly sensitive PF4/ELISA. ​
Reference Range Information
Results are interpreted as negative, borderline positive, or positive.
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Blood Center of Wisconsin Monday through Saturday​ ​2-4 days ​Serotonin Release Assay (SRA)
Reference Lab
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
86022​
For most current information refer to the Marshfield Laboratory online reference manual.