Antigen testing is appropriate when a functional activity deficiency is present. If low, Total Protein S Antigen assesses the Protein S deficiency as Type I or III (IIa).
Draw blood in a light blue-top tube containing 3.2% sodium citrate,
mix gently by inverting 3-4 times. Centrifuge 15 minutes at 1500 g
within one hour of collection. Using a plastic pipette, remove
plasma, taking care to avoid the WBC/platelet buffy layer and place
into a plastic vial. Centrifuge a second time and transfer
platelet-poor plasma into a new plastic vial(s).
Plasma must be free of platelets (<10,000/mcl).
Freeze immediately and transport on dry ice.
Monday, Wednesday, Friday
Reported (Analytical Time)
The CPT codes provided are based on AMA guidelines and are for informational purposes only.
CPT coding is the sole responsibility of the billing party.
Please direct any questions regarding coding to the payer being billed.
Reject Criteria: Hemolysis Transport Temperature: Frozen Specimen Stability: Room temperature and Refrigerated: Unacceptable Frozen: 30 days -70 degrees Celsius: 1 year Methodology: Immunoturbidimetric