Sodium Citrate 1.8 mL Paed (Clear/Pale Blue Inner)
Accurate filling of specimen tube essential. Specimens must be transported at room temperature to the Laboratory in a red specimen bag ASAP. (Maximum delay to testing laboratory must not exceed 2hrs) If the lupus testing is part of a thrombotic profile, please ensure private patients fill out questionnaire (see below) for billing purposes. If part of a thrombotic profile, Lupus testing will not proceed without the relevant paperwork.
Private patients must fill out Patient Questionnaire for Thrombophilia Screen (SI-A 136) or an out-of-pocket expense may be incurred.
Indications for testing for Lupus Anticoagulant (LA) include: 1.) Patient suspected of having antiphospholipid syndrome; 2.)An incidental finding of a prolonged aPTT.
[Antiphospholipid syndrome should be considered in patients (especially those who are younger) with venous thrombosis, arterial thrombosis, or recurrent pregnancy loss.] Lupus screen utilises two methodologies - Russell Viper Venom test (dRVVt) and a lupus sensitive APTT. A positive result should be CONFIRMED at least 12 weeks apart