| Ordering Code | 6674 |
|---|---|
| Test Name | Lupus Anticoagulant DRVVT w/Interp |
| Alias | Lupus Anticoagulant w/reflex to Confirmation LA DRVV DRVVT LA Screen Test includes review and interpretation by Pathologist |
| Preferred Specimen | Plasma |
| Preferred Container | Citrate, 3.2% (Lt. Blue) |
| Other Specimen/Container | Whole Blood in Citrate, 3.2% (Lt. Blue) if testing is done within 4 hours. |
| Optimum Volume | Aliquoted Plasma: 2 mL (2 tubes) |
| Collection Instructions | Draw 2 tubes Full draw 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 | Preferred method of transport is frozen plasma. |
| Specimen Stability | Ambient: 4 Hours Frozen: 2 Weeks Plasma |
| Rejection Criteria | Clotted, Contaminated, Hemolyzed, Improperly filled or underfilled tube, Collected in the wrong anticoagulant, Mislabeled, Specimen older than stability limits |
| Avail. Stat | NO |
| Analytic Time | Up to 5 Days |
| Methodology | Dilute Russell's viper venom |
Reference range(s)
The reference ranges listed below are valid on this date of November 1, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| Protime | ALL | 10.2-12.9 | 10.2-12.9 | secs | |||||
| Part. Throm. Time (PTT) | ALL | 25.1-36.5 | >= 200.1 | 25.1-36.5 | >= 200.1 | secs | |||
| Thrombin Time | ALL | 10.3-16.6 | 10.3-16.6 | secs | |||||
| Anti-Xa | ALL | <=0.05 | <=0.05 | IU/mL | |||||
| DRVVS Ratio | ALL | <=1.20 | <=1.20 | ||||||
| DRVVC Ratio | ALL | See report. | |||||||
| Normalized Ratio | ALL | <=1.20 | <=1.20 | ||||||
| DRVVT S Mix Ratio | ALL | See report. |
