TEST CATALOG ORDERING & RESULTS SPECIMEN HANDLING CUSTOMER SERVICE EDUCATION & INSIGHTS
Test Catalog

Test ID: PSTF    
Protein S Antigen, Plasma

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

If this test is abnormal, then total plasma protein S antigen will be performed at an additional charge.

Specimen Type Describes the specimen type validated for testing

Plasma Na Cit

Specimen Required Defines the optimal specimen required to perform the test and the preferred volume to complete testing

See Coagulation Guidelines for Specimen Handling and Processing in Special Instructions.

 

Patient Preparation: Patient must not be receiving heparin or Coumadin.

Specimen Type: Platelet-poor plasma

Collection Container/Tube: Light-blue top (citrate)

Submission Container/Tube: Plastic vials

Specimen Volume: 1 mL in 2 plastic vials each containing 0.5 mL

Collection Instructions:

1. Centrifuge, remove plasma, and centrifuge plasma again.

2. Freeze specimens immediately at < or =-40 degrees C, if possible.

3. Send specimens in the same shipping container.

Additional Information:

1. A double-centrifuged specimen is critical for accurate results as platelet contamination may cause spurious results.

2. If the patient is being treated with Coumadin, this should be noted. Coumadin will lower protein S.

Special Instructions Library of PDFs including pertinent information and forms related to the test

Forms

Specimen Minimum Volume Defines the amount of sample necessary to provide a clinically relevant result as determined by the Testing Laboratory

0.5 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected

Gross hemolysis Reject
Gross lipemia Reject
Gross icterus Reject

Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included

Specimen TypeTemperatureTimeSpecial Container
Plasma Na CitFrozen14 days