Prothrombin Time 1:1 Mix
| Specialty | Normal Range: Contact Laboratory |
| Also Known as (Alias) | Two 5 ml 3.2 sodium citrated (blue top) tubes as whole blood OR 1 ml Frozen plasma into 4 plastic tubes |
| Indications | ORDERED BY LAB AS A REFLEXIVE TEST ONLY |
| Method | Clottable |
| Test Information | The prothrombin time is performed using a 1:1 mix of patient plasma with normal plasma. Lack of prothrombin time correction with the 1:1 mix indicates the presence of a coagulation inhibitor. If the prothrombin time is abnormal and etiology unclear, the testing will reflex to this test. |
| Additional Test Information | Normal Range: Contact Laboratory |
| Sample Requirements | Whole Blood: 3.2% Sodium Citrated (blue top) OR Frozen Plasma |
| Requested Volume | Two 5 ml 3.2 sodium citrated (blue top) tubes as whole blood OR Frozen plasma in 4 X 1mL aliquots in plastic tubes |
| Sample Information | Whole blood is preferred for testing but if it is not possible to send whole blood tubes TO ARRIVE HERE within 3 hours of collection then send frozen plasma: Centrifuge blue top tubes at 1500g for 15 minutes and remove the plasma and centrifuge a second time at 1500g for an additional 15 minutes. Aliquot approximately 1 ml of plasma into 4 plastic tubes, and freeze. |
| Shipping Information | Whole Blood: Send at ambient temperature (18-25C) and must be received within the lab in less than or equal to 3 hours after collection. Frozen Plasma: send on dry ice Send samples to: Bloodworks Northwest For additional information, please see Ordering Information |
| Requisition Form | RFT- Hemostasis Reference Laboratory |
| Transaction Code | 3200-04 |
| CPT Codes | 85610 |
| Turn around Time (analytic time) | 5 Business Days |
| Report/ Results | Fax number required to receive report |