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Lupus Type Inhibitor

Source Blood
Mnemonic LUPUS
Specimen Requirements

Test cannot be collected by Mobile Collection Service (MCS).

Adult: 2 x 4.5 mL blue top sodium citrate tubes

Pediatric: 1 x 2.7 mL short-draw blue top sodium citrate tube.

Whole blood

When using a winged blood collection set (butterfly needle) a discard tube must be used to remove the air in the tubing, if only a citrate tube is drawn or is the first tube drawn.

Specimen Handling

PSC and RRL:
Send specimens UNSPUN at room temperature directly to DSC Special Coagulation. Must arrive within 2 hours of collection.

Extra-regional:
Centrifuge at 3500 rpm for 20 minutes, aliquot plasma into 4 plastic tubes. Freeze and transport frozen to DSC Special Coagulation.

Additional Information

Includes: TTI, RVV/APTT

Specimens MUST be accompanied with a copy of the original requisition and a Lupus type inhibitor history form.

Test will not be processed if patient is on Argatroban.

Testing Location Special Coagulation
Testing Frequency
Alternate Name(s) Lupus Anticoagulant, DRVVT (Dilute Russell Viper Venom Test)
Reference Interval