Test Code DRVTIM Dilute Russell Viper Venom Time (DRVVT), with Reflex, Plasma
Additional Codes
MAYO: DRVI1
EPIC: LAB319
Shipping Instructions
Send specimens in the same shipping container.
Specimen Required
See Coagulation Guidelines for Specimen Handling and Processing in Special Instructions.
Specimen Type: Platelet-poor plasma
Collection Container/Tube: Light-blue top (citrate)
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Centrifuge, remove plasma, and centrifuge plasma again.
2. Freeze specimen immediately at or below -40° C, if possible.
Additional Information:
1. Double-centrifuged specimen is critical for accurate results as platelet contamination may cause spurious results.
2. Each coagulation assay requested should have its own vial.
Secondary ID
602179Useful For
Detecting and confirming or helping to exclude the presence of lupus anticoagulants (LA)
Identifying LA that do not prolong the activated partial thromboplastin time (APTT)
Evaluating unexplained prolongation of the APTT or prothrombin time clotting tests
Distinguishing LA from a specific coagulation factor inhibitor or coagulation factor deficiencies
Additional Tests
Test ID | Reporting Name | Available Separately | Always Performed |
---|---|---|---|
DRVI4 | DRVVT Interpretation | No | Yes |
Reflex Tests
Test ID | Reporting Name | Available Separately | Always Performed |
---|---|---|---|
DRVI2 | DRVVT Mix Ratio | No | No |
DRVI3 | DRVVT Confirmation Ratio | No | No |
Testing Algorithm
If dilute Russell viper venom time (DRVVT) ratio is ≥1.20, then DRVVT mix and DRVVT confirmation will be performed at an additional charge.
If DRVVT ratio is <1.20, the DRVVT mix and DRVVT confirmation will not be performed.
A DRVVT interpretation will always be performed.
Special Instructions
Method Name
Optical Clot-Based
Reporting Name
DRVVT Screen Ratio, w/Reflex, PSpecimen Type
Plasma Na CitSpecimen Minimum Volume
0.5 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Plasma Na Cit | Frozen | 14 days |
Reject Due To
Gross hemolysis | Reject |
Gross lipemia | Reject |
Gross icterus | Reject |
Reference Values
Dilute Russell viper venom time screen ratio <1.20
Normal ranges for children: Not clearly established, but similar to normal ranges for adults, except for newborn infants whose results may not reach adult values until 3 to 6 months of age.
Day(s) and Time(s) Performed
Monday through Friday
Performing Laboratory

Test Classification
This test has been cleared, approved or is exempt by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
85613-DRVVT
85613-DRVVT mix (if appropriate)
85613-DRVVT confirmation (if appropriate)
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
DRVI1 | DRVVT Screen Ratio, w/Reflex, P | 15359-3 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
RVRI1 | DRVVT Screen Ratio | 15359-3 |
Forms
If not ordering electronically, complete, print, and send a Coagulation Test Request (T753) with the specimen.