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HelpTest Code DRVVT Dilute Russell Viper Venom Time
Synonyms/Keywords
DRVVT
Specimen Requirements
| Specimen Type | Preferred Container/Tube | Acceptable Container/Tube | Specimen Volume | Specimen Minimum Volume (allows for 1 repeat) |
Pediatric Minimum Volume (no repeat) |
|---|---|---|---|---|---|
| *Platelet Poor Plasma | 3.2% Citrated Blue Top Tube (BTT) | 0.75 mL | 0.75 mL | 0.5 mL |
Collection/Processing Instructions
One 0.75 mL citrated Blue Top Tube (BTT) plasma aliquot.
If more than one coagulation test is ordered, a separate aliquot is needed for each test.
- Collect in Citrated Blue Top Tube (BTT)
- Citrate anticoagulant must be adjusted for HCT >55%
- Tube must be at least 90% full
- Invert completely 3-4 times (without shaking) to mix
*See Instructions for: Preparation of Platelet Poor Plasma
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Plasma | Room Temp | 4 hours |
| Refrigerated | 4 hours | |
| Frozen | 6 months |
Rejection Criteria
| Clotted or Hemolyzed |
|---|
| Contamination with IV or Hickman Line fluids |
| Specimens that thaw during storage or transport |
Test Information
To increase the sensitivity and specificity of the laboratory diagnosis of lupus anticoagulants (LA), both SCT and DRVVT should be ordered. These two tests have been combined as "Lupus Anticoagulant Panel (LAPAN)" for ordering convenience.
Lupus anticoagulant testing (DRVVT and SCT) should not be performed on patients receiving rivaroxaban, apixaban, dabigatran, or warfarin. For patients on these medications, one may consider anticardiolipin antibody and/or anti-beta-2 glycoprotein 1 antibody testing.
See Hypercoagulability for more information
Reference Range Information
| Reference Range |
|---|
|
DRVVT ratio: ≤1.2 Negative LA
DRVVT ratio: >1.2 Positive for LA |
Marshfield Labs Performing Department
Marshfield Labs Coagulation
Performing Information
| Performing Location | Day(s) Test Performed | Analytical Time | Methodology/Instrumentation |
|---|---|---|---|
| Marshfield | Monday and Thursday | Less than 2 hours | Optical Clot Detection/ACL TOP 550 |
CPT Codes
| CPT | Modifier (if needed) |
Quantity | Description | Comments |
|---|---|---|---|---|
| 85613 | Optical Clot Detection |
Outreach CPT Codes
| CPT | Modifier (if needed) |
Quantity | Description | Comments |
|---|---|---|---|---|
| 85613 | Optical Clot Detection |
Ordering Applications
| Ordering Application | Description |
|---|---|
| Cerner | Dilute Russell Viper Venom Time |