PROTEIN S ANTIGEN, TOTAL AND FREE, PLASMA
Marquette General Health System

General Info

Alpha Code

   PRSAG

MGH LIS Test No

   568

Schedule

   Monday through Friday

Testing Time

   1 day

Testing Lab

   Mayo Labs

QORR Test Code

   PRSAG

Specimen Info

Type

      

Volume

    

Temperature

   Frozen

Preservative

    

Collection Info

   See special instructions on "Coagulation Studies."
 
1. Draw blood in a light blue-top (citrate) tube.  Spin down, remove
   plasma, spin plasma again, and place 1.0 mL of citrate platelet-poor
   plasma into 2 plastic vials each containing 0.5 mL.  (Glass vials 
   cannot be accepted.)
   NOTE:  Double-centrifuged specimens are critical for accurate
          results as platelet contamination may cause spurious results.
2. Freeze specimens immediately at < or = -40 degrees C, if possible.
3. Send specimens frozen on dry ice.
NOTE:  1. Each coagulation assay requested should have its own
          separate patient vial.
       2. If the patient is being treated with Coumadin, this should
          be noted.  Coumadin will lower protein S.
       3. Please complete a "Coagulation Request Form" and forward it
          with the specimen.  This form is supplied by Mayo Medical
          Laboratories.  Requisitions for this procedure cannot be
          processed unless the information requested is supplied.      
 
Specimen Acceptability

Methods
Enzyme-Linked Immunosorbant Assay (ELISA) COAGULATION TESTING IS HIGHLY COMPLEX, OFTEN REQUIRING THE PERFORMANCE OF MULTIPLE ASSAYS AND CORRELATION WITH CLINICAL INFORMATION. FOR THAT REASON, WE SUGGEST ORDERING "COAGULATION CONSULTATION, THROMBOSIS/ HYPERCOAGULABILITY, PLASMA", P. .

Clinical Utilities

CPT Codes
85305, 85306

Reference Range
TOTAL
  Males:  80-160%
  Females:  <50 Years of age: 70-160%
                   >or= 50 years of age:  55-130%
FREE
  Males:  65-160%
  Females:  <50 Years of age: 50-160%
                   >or= 50 years of age:  65-160%
Algorithm:  Protein s antigen free is performed first.  If the  free protein
s Antgien level is normal, results are reported for this test. If the free
protein s antigen level is abnormal, protein s antgen total is performed, 
reported, and charged separately.

Component Information

Collection Notes

Additional Comments

 

Questions or Comments email support@mgh.org

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