Protein S, Activity

Overview

  • EPIC Code:
  • LAB491
  • Soft Test Code:
  • PROTS
  • Send Out Test Code:
  • 48523 / 1779X
Alternate Names
  • Protein S, Functional

Specimen Collection & Preparation

Specimen Requirements:

-OR-

1.0 mL Platelet Poor Plasma from a Blue Top Tube - 3.2% Na Citrate in a Plastic Vial
Minimum Volume:
0.5 mL Platelet Poor Plasma*

* This volume does not allow for repeat testing

Collection Instructions:

Mix gently by inverting tube 3-4 times immediately after collection. 

Avoid Hemolysis 


Processing Instructions:

  1. Centrifuge 15 minutes at 1500g within 1 hour of collection.
  2. Using a plastic plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into plastic vial.
  3. Centrifuge a second time and transer platelet poor plasma into a new plastic vial.
  4. Freeze Immediatately 


Transport and Storage:
  • Frozen (-20° C or colder): 30 days

    Transport on dry ice

Clinical Interpretation

Reference Range:

Male: 70% - 150% of normal
Female: 60% - 140% of normal


Methodology:
  • Clotting Assay

Production Schedule

Sites Performed
  • Quest - Chantilly
Days Performed
Monday
Tuesday
Wednesday
Thursday
Friday
Departments
  • Sendouts - Clinical
Turn Around Time

3 to 5 days


Coding & Compliance

CDM

01422818


CPT Coding

85306


Medical Necessity Documentation

Recommended as outpatient testing only