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HelpTEST ID HITPANEL HIT (HEPARIN-INDUCED THROMBOCYTOPENIA) PF4 PANEL
Additional Codes
PF4
Performing Laboratory
NRLS-Core Coagulation
Specimen Type
Citrate Plasma AND Serum
Specimen Required
*Container/Tube:
Preferred: 3.2% blue top sodium citrate tube, 1.8 or 2.7 mL
Specimen Volume: Tube must be full
*Container/Tube:
Preferred: Red Top No gel
Specimen Volume: 5 ml
Collection Instructions:
Plasma gel tubes should be centrifuged within 2 hours of collection. 4 hours is acceptable.
Red-top tubes should be fully clotted, centrifuged and aliquoted within 2 hours of collection. 4 hours is acceptable.
Patients with high hematocrit (greater than 55%) results will need a citrate adjusted blue top tube from the laboratory for this test.
Specimen Minimum Volume
Blue top-Tube must be full
Red top- 1.0 mL
Specimen Stability Information
|
Specimen Type |
Temperature |
Time |
|---|---|---|
| Citrated Plasma or Whole Blood | Refrigerated(preferred) | 4 hours |
| Citrated Plasma or Whole Blood | Ambient | 4 hours |
| Citrated Plasma | Frozen | 2 months |
| Serum(red top only) | Refrigerated(preferred) | 1 week |
| Frozen | Indefinite |
Profile Information
|
Reporting Name |
Always Performed |
|---|---|
| Anti-Platelet Factor 4-Heparin (PF4/H) Ab | Yes |
Reflex Testing
|
Reporting Name |
Available Separately |
Always Performed |
|---|---|---|
| SRA (Serotonin Release Assay) | Yes | No |
*A positive HIT-Ab result will reflex a SRA (Serotonin Release Assay) to be sent to reference laboratory for the confirmation or exclusion of HIT Ab.
Reference Values
An interpretive report will be provided