- Transaction Code: 3200-10
- CPT Code (Suggested): 85732
The APTT is performed using a 1:1 mix of patient plasma with normal plasma. Prolongation of the 1:1 mix indicates the presence of a coagulation inhibitor. Shortening of the APTT upon the 1:1 mix to the normal range indicates coagulation factor deficiency.
- Sample Required: 0.5 ml frozen plasma x4 or (2) 3.2% sodium citrated tubes, 5 ml each.
- See Sample Requirements when ordered with other tests.
- Normal Range: Contact laboratory
- Analytic Time: Within 5 working days
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