PTT MIX
Activated Partial Thromboplastin Time (APTT) Mixing Studies
EPIC Test Procedure Code: LAB2005
Performing Lab:
Saint Luke's Regional Laboratories
Container Type:
Light blue top (sodium citrate) tube
Specimen Type:
Platelet Poor Plasma
Preferred Volume:
2 mL
Minimum Volume:
1 mL
Collection Procedure:
Specimen Processing:
1. Centrifuge specimen in a centrifuge that has been validated to ensure platelet poor plasma.
2. Immediately transfer the plasma to a stoppered, plastic tube and centrifuge again for 10 minutes.
3. Transfer the supernatant plasma into a screw-capped, plastic vial and send frozen at ≤ -20°C, if possible.
4. If unable to centrifuge, forward unprocessed sodium citrate whole blood (minimum volume: 2 mL) to the laboratory promptly at room temperature only.
Store and Transport:
Plasma - frozen, Whole Blood - room temperature
Stability:
Unspun specimens must arrive within 4 hours of collection.
CPT Codes:
85730 x 2 - PTT 1 to 1 Mix (EAP 30022100)
Additional 85730 added when incubated mix performed
Test Schedule:
Monday - Friday
Reference Ranges:
An interpretive report will be provided.