Department

Haematology

Preferred Sample Type

Dilute Russells Viper Venom Test - DRVV (Lupus Screen)

2x 2.7mL

Specimen Transport

Standard transport to laboratory

Sample Processing in Laboratory

Sample should be centrifuged

Sample Preparation

To arrive in laboratory within 4 hours of collection. Samples for any coagulation tests must be filled to within a tolerance of 10% of the fill line indicated on the sample tube. Any sample filled above or below this level will be reported as overfilled o

Turnaround Time

10 days

Sample Stability

8 hours

Dilute Russells Viper Venom Test - DRVV (Lupus Screen)

Notes

For the effects of direct oral anticoagulants on coagulation tests click here

DOAC Stop can be applied to the sample to remove all interference from direct oral anticoagulants. If you are requesting a thrombophilia or lupus anticoagulant screen and your patient is on a DOAC, please state clearly on the request form together with which anticoagulant.

Reference Range

Ratio 0.9-1.1

LC ratio > 2.0 Strong lupus anticoagulant detected
LC ratio 1.5 – 2.0 Moderate lupus anticoagulant detected
LC ratio 1.2 – 1.5 Weak lupus anticoagulant detected

Specifications

EQA Scheme?: Yes
EQA Status: NEQAS