| Ordering Code | 517 |
|---|---|
| Test Name | Thrombin Time |
| Alias | Thrombin Clotting Time TT TCT |
| Preferred Specimen | Whole Blood |
| Preferred Container | Citrate, 3.2% (Lt Blue) |
| Other Specimen/Container | Plasma in Citrate, 3.2% (Lt Blue) |
| Optimum Volume | Whole Blood: FULL DRAW Plasma: 1 mL |
| Collection Instructions | >90% Tube fill Mix tube well |
| Handling Instructions | Double centrifuge to produce platelet-poor plasma, avoid the WBC/platelet buffy layer, separate and freeze at -20 deg C immediately. Do NOT thaw once specimen is frozen. |
| Transport Requirements | Oahu: Ambient if Whole Blood and testing is done within 24 hours. Airline: Frozen (Plasma) Note: Send Frozen Plasma if testing will be done >24 hours from collection. |
| Specimen Stability | Ambient: 24 Hours Refrigerated: Not Stable Frozen: 2 Weeks |
| Rejection Criteria | Clotted, Contaminated, Hemolyzed, Improperly filled or underfilled tube, Collected in the wrong anticoagulant, Mislabeled, Specimen older than stability limits |
| Avail. Stat | YES |
| Analytic Time | 1 Day |
| Methodology | Clot Detection |
Reference range(s)
The reference ranges listed below are valid on this date of October 8, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| Thrombin Time | ALL | 10.3-16.6 | 10.3-16.6 | secs |
