Protein S Antigen, Plasma
Testing Algorithm Delineates situation(s) 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 needed for testing
Plasma Na Cit
Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.
See Coagulation Studies in Special Instructions.
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
1. Spin down, remove plasma, and spin plasma again.
2. Freeze specimens immediately at < or =-40 degrees C, if possible.
3. Send specimens in the same shipping container.
1. 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.
3. Patient must not be receiving heparin or Coumadin.
Forms: If not ordering electronically, complete, print, and send a Coagulation Test Request Form (T753) with the specimen (http://www.mayomedicallaboratories.com/it-mmfiles/coagulation-test-request-form.pdf)
Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.
Mild OK; Gross reject
Mild OK; Gross reject
Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.
|Plasma Na Cit||Frozen||14 days|