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HelpTest Code PROT S Protein S Activity
Cerner Test Code
PROT S
Acceptable Collection Tube(s) or Specimen
Blue
Specimen Draw Volume
2.7 mL
Processing Instructions
Draw 2.7 ml in a Blue Top tube. Tube must be filled appropriately to the fill line to ensure accurate results. Centrifuge tube and remove plasma, centrifuge plasma again, and place 1 mL of platelet-poor plasma in an aliquot tube and freeze.
Stability
Stability: Plasma: Room temp 2 hrs, Refrigerated 2 hrs, Frozen 12 months Whole Blood: tubes left capped/unspun are stable for 4 hours at room temperature.
Performed Test Frequency
Weekdays,0700-1300
CPT(s)
85305
Methodology
Clotting
Performing Location
MercyOne Des Moines Laboratory, Hematology
Rejection Criteria
Rejection criteria: Refrigerated plasma.