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Laboratory Medicine

Test catalogue

Dilute Russell Viper Venom Time (Lupus Anticoagulant, DRVVT)

Test Name

Dilute Russell Viper Venom Time (Lupus Anticoagulant, DRVVT)

Blue top Specimen Type / Requirements

Container Type = Blue (Sodium Citrate)

Minimum Volume = Full draw

9:1 Ratio (9 parts blood to 1 part anticoagulant)

Specimen Handling

Collection Instructions: Must indicate anticoagulant status to avoid delay. Ensure both samples and requisitions are labeled properly.

Write your initials, date and time of collection on the collection label.

Transportation: In/Outpatients: Send whole citrated blood at room temperature as soon as possible. Referred-in: Send frozen citrated plasma on dry ice. All samples must be sent to the Core Laboratory.

Stability: Specimens are stable for 4 hours post collection at room temperature. Specimens which are not tested within 4 hours can be double-spun to remove the citrated plasma. The citrated plasma is stable at -20°C for up to two weeks or -70°C for up to six months.

Sample Rejection Criteria: Clotted sample, grossly hemolyzed samples, Unlabeled or samples with insufficient quantity will be rejected.

Required Documentation

Turnaround Time (TAT)

7 days

Test Utilization

Reference Value

Normalized Ratio

< 1.17 (2 SD limit, 2.30% false + rate)

< 1.24 (3 SD limit, 0.15% false + rate)

Test Code

DRVT

Methodology

Clotting Assay

Testing Location

SMH-Special Coagulation

Other Information

Last Updated: June 06, 2019