Heparin-induced thrombocytopenia (HIT screen) (Anti PF4 antibodies)

Test/Investigation

Heparin-induced thrombocytopenia (HIT screen) (Anti PF4 antibodies)

Site(s) or Laboratory offering Test/Investigation

Referral laboratory

Indications

Investigation of suspected cases of Heparin Induced Thrombocytopenia

Comments/Precautions

Please calculate 4T score for pre-test probability before requesting this test. Sample should be filled to the mark in the tube. Under or overfilled samples will be rejected. May be discussed with the duty haematologist if clinical advice needed pre-& post test.

Ideal sample age for accurate results/Maximum acceptable sample age (at the time of analysis)

4 hours; Max 8 hours

Sample type

Citrate (1:9) + A clot sample is required for confirmation if screen positive

Turnaround times (TAT) Urgent/Routine/GP or OPD

3 days