At a Glance
Why Get Tested?
To help evaluate a prolonged activated partial thromboplastin time (aPTT) and/or a thrombotic episode, to help determine the cause of recurrent fetal loss, as part of an evaluation for antiphospholipid syndrome. Not a diagnostic test for lupus (SLE).
When to Get Tested?
A blood sample is obtained by inserting a needle into a vein in the arm.
Test Preparation Needed?