TEST MUST BE SCHEDULED 24 HOURS IN ADVANCE WITH THE LABORATORY at 214-645-5067.

2 light blue top tubes (3.2% sodium citrate) AND 1 purple top tube (EDTA) Total 9 mL sodium citrate whole blood and 4.5 mL EDTA whole blood.  Specimen must arrive in the laboratory within 1 hour after collection.  Maintain specimen at room temperature.

Specimen must be accompanied by a Platelet Aggregation Studies: History Form.  Report will be delayed until form has been submitted.

CRITICAL WARNING:  Specimen must remain at room temperature and be received into the laboratory within 1 hours after collection.