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PROTEIN C ASSAY (FUNCTIONAL)

Synonym(s):
Lab Section Category
View write-up
Specimen Required

​3 mL blood containing 0.3 mL of 3.2% sodium citrate

Method

​Chromogenic Assay

Reference Interval / Value

​70 - 140%

Turnaround Time

​1 week

Day(s) Test Set up

​Weekly

Remarks

Note: Coumadin will lower the Protein C level. Assay cannot be performed if patient is on heparin.

Last Updated - 13 Jun 2025