Prothrombin Time
| Order Code: | PT |
| Epic Lab Code: | LAB320 |
| Order Form: | A-1a General Lab or Epic Req |
Hemostasis/Thrombosis
6240 RCP
356-3573
6240 RCP
356-3573
Specimen:
Plasma
Collection Medium:
 |
| Light Blue top tube 1.8 mL (Na Citrate) |
Minimum:
Full draw; 1.8 mL light blue top (mix well). Tube must be at least 90%
full.
Analytic Time:
2 hours (upon receipt in laboratory)
Reference Range:
9-12 seconds
INR Critical Reference Value: greater than 3.9
Comments:
The INR corresponding to the PT is reported to assist in the monitoring
of oral anticoagulants. Must be drawn swiftly with a clean
venipuncture (no hematoma). Time drawn must be indicated on
requisition. Obtain special tube from lab if hematocrit is over 55%.
Sample should be kept at room temperature, unopened to be delivered to
lab within 24 hours.
Prothrombin Time may be performed on the same collection tube as
Activated Partial Thromboplastin time (aPTT) and Fibrinogen.
Methodology:
Optical clot detection.
CPT Code:
85610
See also:
Activated Partial Thromboplastin Time (aPTT), Plasma
Activated Partial Thromboplastin Time (aPTT), Plasma