| Ordering Code | 6304 |
|---|---|
| Test Name | Elevated PTT/Normal PT Workup, w/ Reflex |
| Alias | Abnormal aPTT/Normal Prothrombin Time Reflexive Profile Prolonged Activated Partial Thromboplastin Time/Normal Prothrombin Time Workup with Reflex testing |
| Profile Contains | |
| Preferred Specimen | Plasma, Citrate 3.2% (Lt Blue) |
| Preferred Container | 3 B (Citrate - Blue Top) |
| Optimum Volume | 4 mL (4 aliquot tubes with 1 mL of plasma in each) |
| Collection Instructions | Draw 4 full tubes. Mix tubes well. |
| Handling Instructions | QMC Punchbowl: Deliver specimens to the Punchbowl laboratory immediately Other sites: Double centrifuge specimen(s), aliquot plasma into 4 separate aliquot tubes and freeze at -20 deg. C immediately. Do NOT thaw once specimen is frozen. |
| Transport Requirements | Preferred method of transport is frozen plasma. |
| Specimen Stability | Ambient: 1 Hour Whole Blood (unopened tubes) Frozen: 2 Weeks Plasma |
| Avail. Stat | NO |
| Analytic Time | 1 Day |
Reference range(s) for Prothrombin Time (PT)
The reference ranges listed below are valid on this date of April 19, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| Fibrinogen | ALL | 200-393 | 200-393 | mg/dL |
Reference range(s) for Prothrombin Time (PT)
The reference ranges listed below are valid on this date of April 19, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| Prothrombin Time (PT) | ALL | 10.2-12.9 | 10.2-12.9 | secs | |||||
| INR | ALL | >= 4.5 | >= 4.5 | Moderate-intensity... Note1 |
Note1:
Moderate-intensity Warfarin therapy 2.0-3.0Higher-intensity Warfarin therapy 2.5-3.5
.
Reference range(s) for Prothrombin Time (PT)
The reference ranges listed below are valid on this date of April 19, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| Activated Part. Throm. Time (APTT) | ALL | 25.1-36.5 | >= 200.1 | 25.1-36.5 | >= 200.1 | secs |
Reference range(s) for Prothrombin Time (PT)
The reference ranges listed below are valid on this date of April 19, 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 |