Test Name
PROTEIN S, ANTIGEN
Aliases
-
Abbreviations
-
Test Classification
INDIVIDUAL
Department
HEMATOLOGY
Sub Department
COAGULATION
TAT Category
ELAPSED (CONTINUOUS) TIME
Estimated TAT
12
TAT Units
DAYS
Test Requirements
If doctor's order does not specify between antigen vs activity, select protein s ACTIVITY as the default test (test code H0177).
FROZEN, DOUBLE CENTRIFUGED TWO 2mL CITRATED PLASMA aliquots required. Collect whole blood in citrate tube(s) i.e. light blue cap vacutainer filled up to the mark, centrifuge, separate plasma, centrifuge plasma, separate & FREEZE supernatant.
For instructions/ further guidance on how to prepare platelet poor plasma, please visit this YouTube video: https://www.youtube.com/watch?v=9z6c8Bgr2EYSHIPPING
TRANSPORTATION REQUIREMENTS
Shipping Temperature: Frozen
ANALYTE STABILITY
Frozen: 3 months at -20°C
Clinical Utility
Thrombosis and thrombosis risk assessment. Diagnose hereditary or acquired protein S deficiency.
Last Review
26th Feb 2026