PROTEIN S ANTIGEN

Test Documentation
Specimen Required
Draw blood in a light blue 3.2 % sodium citrate tube. See appendices for coagulation test collection instructions. Send 1.0 mL plasma (0.5 mL minimum) frozen in a screw-capped plastic vial. Separate samples should be submitted when multiple tests are ordered.
CRITICAL FROZEN.

Rejection Criteria
Hemolyzed samples; Thawed samples

Methodology
Latex Immunoassay

Stability
Room Temperature: 4 hours; Refrigerated: Unacceptable; Frozen: 1 month
CRITICAL FROZEN. Testing cannot be performed on a sample that has been thawed and refrozen.

Reference Range
50-140%

Performed
Monday-Friday

Turnaround Time3 days
Test CodePSAG
CPT-4 Code (s)
85305
LOINC Codes
27823-4

Warde
Medical
Laboratory