Specimen Requirements

Title

PROTEIN S ACTIVITY

Specimen Requirement

1-Blue top tube (sodium citrate 3.2%). Tube must be full when collected. Centrifuge specimen and remove plasma to a transport tube and freeze. Indicate on tube “plasma/blue top”. Contact lab for dry ice for shipment.

Methodology

Stability

Frozen 3 weeks

Reference Range

By Report*

Turnaround

Performed Friday

Clinical Use

Diagnosis of congenital protein S deficiency which may increase the risk of thrombosis. An abnormal result should be followed up with protein S antigen, total and free.

Test Code

PTSAS