A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
PROTEIN S ANTIGEN, FREE
MessageDo not thaw and refreeze
Test Code
PRTSF
CPT Codes
85306
Preferred Specimen
1 Blue tube (Sodium Citrate)
Minimum Volume
1 mL platelet-poor plasma
Other Acceptable Specimens
None
Instructions
Tube MUST be full for proper whole blood to anticoagulant ratio. Invert tube "end to end" to prevent clotting.
Transport Temperature
Frozen
Specimen Stability
Frozen at -20°C or lower up to 1 month
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
The following conditions will result in a rejected sample:
- Serum
- EDTA plasma
- Clotted or hemolyzed specimens
- Refrigerated whole blood
- Whole blood greater than 4 hours from time of collection
Methodology
Chromogenic
Setup Schedule
Tuesday and Thursday only
Report Available
Report available the same day tested.
Reference Range
Age | Male | Female |
---|---|---|
Adult | 74-146% | 55-124% |
Clinical Significance
Recommended test to detect protein S deficiency. Do not order if individual has been on warfarin (Coumadin) therapy in the previous 2-4 weeks.
Performed By
Alverno Laboratories
Performing Laboratory
Alverno Central Lab
NHMC (Hematology, Miscellaneous)
Additional Information
Obtaining A Platelet-Poor Sample
BD Vacutainer Plus Blue Top Volume Guide
Last Updated: June 7, 2023