Dilute Russell Viper Venom Time
Test Mnemonic
DRVVT
CPT Codes
- 85613 - QTY (2)
LOINC ®
6303-2
Aliases
- DRVVT
Includes
- DRVVT Confirm Ratio
- DRVVT Screen
- DRVVT 1:1 Mix
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 2 mL | Plasma | Sodium citrate (Lt. Blue) | See note | Frozen | Two 1 mL aliquots |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Frozen | 14 days at -20 C; 6 months at -70 C |
| Ambient | 4 hours |
| Refrigerated | Unacceptable |
Days Performed
Mon - Fri
Turnaround Time
1 - 3 days
Methodology
| Name | Description |
|---|---|
| Clotting Assay |
Reference Range
| DRVVT 1:1 Mix | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Years | 99 Years | Normal | 32.0-45.7 | sec | |
| DRVVT Confirm Ratio | |||||
| Sex | Age From | Age To | Type | Range | Range Unit |
| Years | 99 Years | Normal | < 1.32 | . | |
| DRVVT Screen | |||||
| Sex | Age From | Age To | Type | Range | Range Unit |
| Years | 99 Years | Normal | 32.0-45.7 | sec |
Special Info
3.2% sodium citrate is the preferred anticoagulant recommended by CLSI. Indicate if patient is receiving heparin or coumadin. This test should not be used alone in the diagnosis of a lupus anticoagulant, as many factors, such as anticoagulant therapy, can interfere with this assay. It is also suggested that a APTT mixing study, Staclot LA(hexagonal phase phospholipid assay) and a platelet neutralization test be ordered in the evaluation of a lupus anticoagulant.
Clinical Info
Confirmatory assay to detect the presence of a Lupus Anticoagulant. Heparin therapy or any anticoagulant therapy and coagulation inhibitors can prolong the DRVVT.