Laboratory Medicine
Test Directory / International Normalised Ratio (INR)
International Normalised Ratio (INR)
Citrated Plasma
| Test | International Normalised Ratio (INR) |
|---|---|
| Common Abbreviations | INR |
| Profile | |
| Clinical Indication | Calculation derived from the Prothrombin Time (PT/MNPT^ISI). Used to monitor Warfain. |
| Specimen Type | Blood |
| Sample Type | Citrated Plasma |
| Minimum Volume | 1 x 3mL (adult) 1 x 1mL (paed) (citrated plasma must be filled to bottle line) |
| Special Precautions | Only use for Warfarin monitoring. |
| Stability | 24 hrs at room temp |
| Turnaround Time | 1 hour (urgent) 4 hours (routine) |
| Laboratory | York & Scarborough Hospital |
| Reference Interval | N/A |
| Limitations | Haemolysis, gross lipaemia, high haematocrit may interfere with measurement. Over or under filled samples cannot be used due to ratio between blood and citrate |
| Additional Information |
