Test ID: ZH368
CPT code: 85306, 85305
LOINC:
Specimen Type: Blue (sodium citrate)
Frequency: 2 – 3 days
Instruction:3 mL Plasma from Blue-top (sodium citrate), Frozen, PLT poor. Min 2 mL.
Text: Confirmation and characterization of protein S (PS) congenital deficiency. A deficiency in PS, either congenital or acquired, increases the risk of thromboembolism because of a decrease in the anticoagulant capacity of the blood.
Methodology: Tot&Fr PS ags are measured by latex immunoassay. Fr PS is measured by EIA after C4b-BP complexed PS is precip out with polyethylene glycol