INR
24 hours
Chronometry
Accredited NRL Laboratory
Daily
Prothrombin time to assess extrinsic coagulation pathway.
Plasma
0.5 mL
3.2% sodium citrate blue top
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
This test does not require any special collection or pre-analytical handling. Follow routine specimen collection protocols.
| Temperature | Period |
|---|---|
| Room temperature | Whole blood/Plasma: 4 hours |
| Frozen | Plasma: 7 days |