Pathology Handbook

Recent changes for HIT Platelet serotonin release assay
Date	Field	Changed From	Changed To
16th April 2026	Alternative names	Serotonin Release Assay	HIT-Serotonin Release Assay Suspected Heparin-Induced Thrombocytopenia Thrombosis Syndrome (HITTS) Serotonin Release Assay
	Volume (Adults)	2 mL	3 mL

Alternative Names:

HIT-Serotonin Release Assay Suspected Heparin-Induced Thrombocytopenia Thrombosis Syndrome (HITTS) Heparin Induced Platelet Se

Laboratory:

Haematology

Test Code:

HITSRA

Specimen Types:

Plasma

Container Types:

Sodium Citrate

Adults Volume or Mass:

3 mL

Collection & Request Instructions:

Two (2x) collection tubes required
Add exactly 2.7 mL of blood & mix by inversion.

Transport Instructions between Sites and/or Laboratories:

Send to lab immediately

External Laboratory:

SEALS - Prince Of Wales