Protein S Free, Antigen

Specimen:

Test Code

YPSACT

Specimen Name

Protein S Free, Antigen

Collect

2-Blue Top (Na Citrate)

Submit

1.5 mLs (Min: 1 mL) Plasma CRITICAL FROZEN

Special Handling

Transfer 1.5 mL platelet-poor plasma to a standard transport tube.

Rejection Criteria

Serum. EDTA plasma, clotted or hemolyzed specimens.

Stability

Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: 3 months

Methodology

Microlatex Particle-Mediated Immunoassay

Performed

Monday- Saturday

Reported

3-5 days

CPT Codes

  • 85306

Components

Additional Information

Recommended test to detect protein S deficiency. Do not order if individual has been on warfarin therapy in the previous 2-4 weeks. https://www.aruplab.com/Specimen-Handling/SpecialSpecimenCollection/Hemostasis-Thrombosis.pdf

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Test Information

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Common Lab Definitions

  • Serum 
  • Plasma 
  • STT