Thrombin Time TT
| Method(s) | Clot Detection |
|---|---|
| Specimen Required | |
| Collect | One adequately filled 3.0 mL light blue (sodium citrate) top tube. |
| Transport | **TIME SENSITIVE** For specimens that cannot be shipped to the laboratory to arrive within 4 hours of collection, see Collection and Processing of Coagulation Specimens information (link below). |
| Remarks | Draw blood into the citrate (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, collected in the incorrect specimen tube, less than 90% filled, exceed stability limits or hemolyzed are not acceptable for testing. |
| Schedule | Daily |
| Billing Code | 4010054 |
| CPTCode | 85670 |
| Preferred Specimen Collection Device(s) | |
| Reference Interval | |
|
16.0-22.0 seconds |
|
