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Lupus Anticoagulant Testing

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Also known as: LA; LAC; Lupus Anticoagulant Panel; Lupus Inhibitor; LA Sensitive PTT; PTT-LA; Dilute Russell Viper Venom Test; DRVVT; Modified Russell Viper Venom Test; MRVVT
Formal name: Lupus Anticoagulant
Related tests: Antiphospholipid Antibodies; Hexagonal Phase Phospholipid Neutralization Assay; PTT; Thrombin Time; Cardiolipin Antibodies; PT and INR; Beta-2 Glycoprotein 1 Antibodies; Kaolin Clotting Time; Platelet Neutralization Test; Factor V Leiden Mutation and PT 20210 Mutation; Homocysteine; Protein C and Protein S; Antithrombin

At a Glance

Why Get Tested?

To help investigate the cause of a blood clot (thrombotic episode); to evaluate a prolonged partial thromboplastin time (PTT); to help determine the cause of recurrent miscarriages, or as part of an evaluation for antiphospholipid syndrome; the tests are not used to diagnose the chronic autoimmune disorder systemic lupus erythematosus (SLE), commonly known as lupus.

When to Get Tested?

When you have had signs and symptoms of a blood clot in a vein or artery (known as thrombosis or thromboembolism); when you have a prolonged PTT test; when you have had recurrent miscarriages

Sample Required?

A blood sample obtained by inserting a needle into a vein in your arm

Test Preparation Needed?