Not recommended for detecting protein S deficiency; preferred test is Protein S Free, Antigen (0098894). Use to subtype deficiency in known protein S-deficient individuals in combination with Protein S Free, Antigen (0098894), or Protein S, Functional (0030114). Do not order if individual has been on warfarin therapy in the previous 2-4 weeks.
Microlatex Particle-Mediated Immunoassay
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.
Transfer 1.5 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1 mL)
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Serum. EDTA plasma, clotted or hemolyzed specimens.
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen at -20°C: 3 months, at -70°C: 6 months
|11 years and older||84-134%||63-126%|
Patients on warfarin may have decreased protein S values. Patients should be off warfarin therapy for two weeks for accurate measurement of protein S.
|Component Test Code*||Component Chart Name||LOINC|
|0030112||Protein S, Total Antigen||27823-4|
- Free Protein S Antigen
- Protein S Antigen, S Protein Antigen
- Total Protein S Antigen