Test Catalog

Test ID: DRV3    
Dilute Russell Viper Venom Time (DRVVT) Confirmation, Plasma

Method Description Describes how the test is performed and provides a method-specific reference

The dilute Russell viper venom time (DRVVT) confirmation assay is performed on the Instrumentation Laboratory ACL TOP. The assay is performed by incubating patient plasma for a specified time, then combining it with a DRVVT confirm reagent containing Russell viper venom, excess phospholipids, antiheparin agents, calcium, buffers, and stabilizers to trigger the coagulation process. The time to clot formation is measured optically using a wavelength of 671 nm.


The DRVVT confirmation is converted to a ratio by dividing the DRVVT screen clotting time by the DRVVT confirmation clotting time.(Package insert: CRYO LASURE, PrecisionBioLogic, Inc., Dartmouth, NS, Insert I-022 Rev.12)

PDF Report Indicates whether the report includes an additional document with charts, images or other enriched information


Day(s) Performed Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day.

Monday through Friday

Report Available The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing.

2 to 5 days

Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

7 days

Performing Laboratory Location Indicates the location of the laboratory that performs the test