HEPARIN-INDUCED PLATELET (PF4) ANTIBODIES

Specimen Required
Draw blood in a SST. Centrifuge, separate and send 0.5 mL serum (0.2 mL minimum) frozen in a screw-capped plastic vial.

Alternate Specimen
Plasma: ACD or sodium citrate

Rejection Criteria
Hemolyzed or lipemic specimens, heparinized plasma

Methodology
Enzyme Immunoassay

Stability
Room Temperature: Unacceptable; Refrigerated: 48 hours; Frozen: 14 days

Reference Range
<0.4000 OD

Performed
Monday-Friday

Turnaround Time1-2 days
Test CodeHEPF4
CPT-4 Code (s)
86022
LOINC Codes
34701-3

Warde
Medical
Laboratory