Neutralization, Hexagonal Phase Phospholipid
7 days
Clotting time using an activated partial thromboplastin time (aPTT) reagent is determined both in the presence and in the absence of HPP. The assay is considered to be positive for lupus anticoagulant when addition of HPP reduces the aPTT by more than 8 seconds.
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Screening test for lupus anticoagulant. Measures interference in phospholipid-dependent clotting.
Plasma
1 mL
Blue top (sodium citrate) tube
Ideally, the patient should not be on anticoagulant therapy. Avoid warfarin (Coumadin®) therapy for two weeks prior to the test and heparin, direct Xa, and thrombin inhibitor therapies for about three days prior to testing. Do not draw from an arm with a heparin lock or heparinized catheter.
Citrated Plasma samples should be collected by double centrifugation
| Temperature | Period |
|---|---|
| Frozen | Contact Technical Support |