Item Value
Test name Protein C, Antigen
Available Stat? No
Turn around times 4-8 days
Performed by Quest
Normal range
0-1 day 17-53%
2-5 days 20-64%
6-30 days 21-65%
31-90 days 28-80%
91-180 days 37-81%


≥ 18 year olds 70-140%
Container type Blue top filled to full extent of vacuum
Amount to Collect 2.7 mL blood
Collection Instructions 1. Check the expiration date on the label of the blue top vacutainer before drawing the patient.

2. For blood collection in a sodium citrate blue top, the tube must be filled to above the Minimum Fill Indicator on the tube. It is crucial to wait and allow the tube to stop filling before removing it from the needle.

3. With use of a butterfly needle, draw about 1 cc using a separate blue top to remove air from tubing, discard the first tube and then draw a second blue top tube filled to the full extent of the vacuum.

4. Tubes should not be filled past the Maximum Fill dashed line by either using a syringe or removing the tube cap.

If "Protein C" is requested without further specification a protein C activity will be performed.
Sample type Citrated plasma

If you have additional questions regarding this test, please call: 415-353-1667