PT 1:1 Mix
| Mixing studies, Prothrombin Time Mix | |
| Core Laboratory & Transfusion Medicine | |
| Hematology | |
| Blood | |
|
PTMIX
|
MSH Coagulation requisition form (MS 520)
The presence of a factor deficiency in the extrinsic and/or common pathway can be detected by performing a Prothrombin Time (PT) on a mixture of patient plasma and normal pool without incubation. A factor deficiency is indicated if the normal plasma corrects the elevated PT of the patient sample.
Plasma (3.2% Na Citrate)
Full draw
Send whole blood sample(s) at room temperature as soon as possible.
If specimens cannot be shipped immediately, centrifuge and separate plasma within 1 hour of collection, send frozen plasma on dry ice
If specimens cannot be shipped immediately, centrifuge and separate plasma within 1 hour of collection, send frozen plasma on dry ice
Fridge: N/A
Room Temperature: 24 hours
Freezer: - 20 °C 2 weeks - 70 °C 6 months
Automated Coagulation Analyzer
24 hours, 7 days/week.
1 hour
2 hours
416-586-4800 Extension 4688
Must indicate anticoagulant status
PT mixing studies are not performed:
- if the PT falls within the normal PT Reference Interval. See Reporting.
- if the patient is on heparin or oral anticoagulant therapy. See Reporting.
- if the PT falls within the normal PT Reference Interval. See Reporting.
- if the patient is on heparin or oral anticoagulant therapy. See Reporting.