The test is not run on holidays, but will be run the next business day instead.
3 hours
Test Updated:
Platelet Factor 4 Antibody
PF4 Antibody
Heparin Antibodies
Heparin Associated Throbocytopenia and Thrombosis
Heparin Associated Thrombosis
Heparin Associated Thrombosis (HAT)
Heparin Dependent Antiplatelet Antibodies
Heparin Dependent Anti-Platelet Antibodies
Heparin Induced Thrombosis (HIT)
Heparin-Associated Thrombocytopenia and Thrombosis
Platelet Antibody, Heparin Dependent
HIT ELISA
HEPARIN ANTIBODY ASSAY
Heparin Associated Platelet Antibody
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Test Overview
Heparin-associated antibodies to PF4 detected by an ELISA technique.
Detection of heparin-dependent platelet antibodies.
0.000 - 0.399. Negative
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Specimen Requirements
Collect specimen in a blue top (citrate 3.2%) tube. Mix by inversion. Specimen should arrive at lab within 3 hours of collection; transport at room temperature. Alternatively, centrifuge, aliquot plasma into a plastic tube, and freeze the specimen within 4 hours of collection. Transport frozen specimen on dry ice. Collection of the blood through lines that have been previously flushed with heparin should be avoided. If the blood must be drawn through a VAD (vascular access device), the line should be flushed with 5 mL of saline and the first 5 mL of blood or six dead space volumes of the VAD discarded.
