Laboratory Test Detail

Last Updated: September 26, 2022 @ 9:13 am


Protein S, Functional

  • One Blue Top (Na Citrate)
  • 2 mL (Min:1 mL) Plasma . Submit Frozen. Submit in a Standard Transport Tube.
Special Handling:
  • Avoid Repeated Freeze/Thaw Cycles
  • Patients that are on therapeutic coagulation drugs, including but not limited to Rivaroxaban, Apixaban, Edoxaban, Dabigatron, Vit K antagonists, and Unfractionated Heparin are known to cause interference with testing. Discontinue drugs for a minimum of 24 hours prior to any coagulation studies.
Rejection Criteria:
  • Collection tube not properly filled
  • Grossly Hemolyzed Samples
Stability:Ambient: 4 Hour(s); Refrigerated: Unacceptable; Frozen: 1 Month(s); Incubated: Unacceptable
  • Mechanical Clot Detection
Reported:1-8 Day(s)
CPT Codes:
  • 85306
Interpretive Data:General Reference Range : 57-143 %activity
Male Reference Ranges
  • 0 - 150 year(s) : 66-143 %activity

Female Reference Ranges
  • 0 - 150 year(s) : 57-131 %activity
  • 2642 - PROTEIN S FUNCT
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