Prothrombin Time (PT) Mixing Studies PTM
Method(s) | Clot Detection |
---|---|
Specimen Required | |
Collect | One adequately filled 3.0 mL light blue (sodium citrate) top tube. |
Transport | 3 mL whole blood at 20-25ºC. |
Remarks | Draw blood into the citrate tube (light blue cap) filled to the proper level (1 part anticoagulant to 9 parts blood). Invert tube 3-4 times to avoid clotting. |
Stability | Ambient and Refrigerated Plasma: 4 hours; Frozen Plasma: 2 weeks |
Unacceptable Conditions | Specimens that are clotted, hemolyzed, collected in the wrong tube, less than 90% filled, or non-frozen plasma are unacceptable for testing. |
Schedule | Daily-24 hours per day |
Billing Code | 4010119 |
CPTCode | 85611 X2 |
Preferred Specimen Collection Device(s) | |
Reference Interval | |
9.2 - 11.9 seconds |