PROTEIN S ANTIGEN, FREE

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Note: Do not order if individual has been on warfarin (Coumadin) therapy in the previous 2-4 weeks.

Test Code

LAB7936

CPT Codes
85306

Preferred Specimen

1 Blue tube (Sodium Citrate)

Patient Preparation
Standard venipuncture, avoid traumatic puncture. Tube MUST be full for proper whole blood to anticoagulant ratio. Invert tube "end to end" to prevent clotting.

Minimum Volume

1 mL platelet-poor plasma (2 mL platelet-poor plasma)

Instructions

Refer to document below,obtaining a platelet-poor specimen.

Transport Container

Transfer tube

Transport Temperature

Frozen

Specimen Stability

Frozen at -20°C or lower up to 1 month

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Serum
EDTA plasma
Clotted or hemolyzed

Methodology
Chromogenic

Setup Schedule

Tu, Th

Batched; day shift; once per day performed

Report Available

Same day testing is performed

Reference Range

Age	Male	Female
Adult	74-146%	55-124%

Clinical Significance

Recommended test to detect protein S deficiency.

Performing Laboratory
Alverno Central Lab

Additional Information
Obtaining A Platelet-Poor Specimen

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.