Heparin-Induced Thromobocytopenia Evaluation - PEA

Functional/Serologic Test

Serum

5 ml

1 ml

Sample should be spun down and taken off the clot. Plasma is NOT acceptable. Sample must be received within 7 days of draw date if refrigerated. Send samples refrigerated. Older serum samples are acceptable if they have been frozen. Send frozen samples on Dry Ice. Room temperature samples are not acceptable. Heparin-Induced Thrombocytopenia Evaluation is a reflexive algorithm. IgG-PF4 ELISA is always performed. If ELISA results are non-negative a P-Selectin Expression Assay (PEA) will be performed.

2-4 days

Yes

No