Name: Heparin Induced Platelet Ab
Test Name: Heparin Induced Platelet Ab
Health Link Test Code: HCHEPAB
LIS Test Code: HEPAB
CPT Code(s): 86022
Test is used for the qualitative detection in plasma or serum of the anti-heparin-platelet factor 4 antibodies generated during type II heparin-induced thrombocytopenias.
Days Performed: Daily- Specimens are accepted at any time. Testing required during off hours must be approved by a Coagulation physician. Call (608)263-5005 before collection.
In-Lab Turnaround Time: 2 days.
Stat In-Lab Turnaround Time: 1 day.
Collection Container: Light blue top (3.2% NaCitrate)
Also Acceptable: Red top
Please indicate if patient is receiving anticoagulant (Warfarin/Heparin/Vitamin K antagonist), direct thrombin inhibitor or fibrinolytic agent therapy.
Collection Volume: Full 3.5 mL tube
Pediatric Collection Volume: Pediatric tube filled to fill mark
24 hours on a spun tube
2 weeks at -20°C; 6 months at -70°C
Sample Analyzed: Plasma or serum
Testing Volume: 1 mL
Pediatric Testing Volume: 0.5 mL
Centrifuge specimen to yield platelet poor plasma/serum (platelet count should be less than 10 K/µL). Separate plasma/serum and transfer to plastic tube or vial. Freeze plasma/serum at -20°C or below.
Transport whole blood specimen at room temperature to UWHC Hospital Laboratory within 4 hours of collection. See Specimen Processing for instructions if transport criteria are not met. Transport frozen aliquot on dry ice to UWHC Hospital Laboratory.
Hemolyzed specimens, clotted specimens, partially filled tubes and whole blood specimens greater than 4 hours old when received by the laboratory are not acceptable.
0 days and up: Negative
Interpretation Type: Expected Results
The optical density (OD) of the reference calibrator and the patient are reported as an aid for interpretaton.