PROTEIN S ANTIGEN, FREE

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
Immunoturbidimetric

Stability
Room Temperature: 4 hours; Refrigerated: Unacceptable; Frozen (-20°C): 30 days
CRITICAL FROZEN. Testing cannot be performed on a sample that has been thawed and refrozen.

Reference Range
Male:   57-171% normal  
Female:   50-147% normal  

Performed
Tuesday, Friday

Turnaround Time5-7 days
Test CodePRSF
CPT-4 Code (s)
85306
LOINC Codes
27821-8

Warde
Medical
Laboratory