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Test Code Pro-S Protein S Activity

Important Note

Draw 2 tubes- Must be completely filled.

If transport to the lab will exceed 4 hours: Immediately centrifuge the specimen 2 times and aliquot 2 mL of plasma into a separate plastic vial.  Send specimen frozen.

Performing Laboratory

Memorial Hospital Laboratory- Automated Procedures      304-388-5953       

Specimen Requirements

Plasma- Light Blue Top, Sodium Citrate

Draw 2 full, tube by “clean” venipuncture (no excessive trauma).

Immediately after draw, invert tubes several times to mix blood with additive.

Specimen Rejection

  • Improperly labeled, collected, stored, and transported
  • Quantity not sufficient
  • Hemolyzed 
  • Lipemic
  • Clotted

Storage and Stability

Room temperature 18-24oC 4 hours
Frozen < -20oC 2 weeks

Reference Values

63.5-149.0%

 

Interpretation

Protein S is a Vitamen K dependant protein

Methodology

Clot formation

Days Test Set Up and Turnaround

Monday through Friday, Batched, Dayshift Only 7AM- 2:30PM

Turnaround Time- 1-3 day on days offered

 

CPT Coding

85305