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Protein S Activity

Important Note

Warfarin (Coumadin) interfers with levels. Patients should be off of this medication for a minimum of 7 days

eD-H Order Code

LAB492

Specimen Collection Information

Specimen Minimum Test Volume Container Special Handling
Blood

PEDI, PICU, or ICN draws refer to specimen collection job aid.

All other Coag tubes must be filled to the line on tube.

  

Specimen Transport Temperature

Double spin, separate, and freeze

Reference Ranges / Critical Values

Assay Gender Age Range Normal Range Critical Values Units
Protein S Act Male 15 Days – 1 Months 29 -115   % activity
    1 Months – 6 Months 33 -154   % activity
    6 Months – 1 Years 52 -138   % activity
    1 Years – 6 Years 60 -149   % activity
    6 Years – 11 Years 67 -162   % activity
    11 Years – 18 Years 53 -147   % activity
    18 Years – 150 Years ≥64   % activity
  Female 15 Days – 1 Months 29 -115   % activity
    1 Months – 6 Months 33 -154   % activity
    6 Months – 1 Years 52 -138   % activity
    1 Years – 6 Years 60 -149   % activity
    6 Years – 11 Years 67 -162   % activity
    11 Years – 18 Years 53 -147   % activity
    18 Years – 150 Years ≥64   % activity
  Unknown 15 Days – 1 Months 29 -115   % activity
    1 Months – 6 Months 33 -154   % activity
    6 Months – 1 Years 52 -138   % activity
    1 Years – 6 Years 60 -149   % activity
    6 Years – 11 Years 67 -162   % activity
    11 Years – 18 Years 53 -147   % activity
    18 Years – 150 Years ≥64   % activity

Specimen Stability

4 hours

Additional Specimen Instructions

1.8mL Sodium Citrate tube filled to the line

OR

2.7 mL Sodium Citrate tube filled to the line

 

 

Blue top tubes must be filled within 10% of stated volume. A discard tube must be used if a citrate tube is to be drawn using a winged blood collection set.  It is important to remove air from the blood collection set to ensure the proper blood volume is obtained in the coag tube.

 

If the patient has a known hematocrit >55%, please contact the coagulation lab for an adjusted collection tube before drawing the blood.

CPT(s)

85306

Performing Lab Section

Hematology

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