.

Vanderbilt Pathology Laboratory Services

Test Directory



PROTEIN C ACTIVITY (CAC)

Department: Coagulation
Test Synonym(s): CAC
CPT Codes: 85303
Methodology: Chromogenic
Reference Range: 50 - 120%
Tube Type: Light blue top (Sodium Citrate)
Specimen: Citrated plasma - platelet poor. This sample requires double centrifugation if sending a plasma aliquot

Alternate Specimen: None
Pediatric Requirements: Peds - 2.7 mL Neonates - 1.8 mL
Volume: 1.0 mL plasma
Minimum Volume: 1.0 mL plasma
Temperature: Room temperature or send as a frozen plasma aliquot if sample will not be received into the lab within 4 hours.
Stability: Room temperature: 4 hours
Reasons for Rejection: Clotted sample, incorrectly filled tube, markedly hemolyzed sample, sample sent as whole blood > 4 hours old
Days Performed: Monday - Friday
Times Performed: 8:00 a.m. - 4:00 p.m.
TAT: 1 day
Significance: Presence of Aprotinin in the sample will result in an under estimation of the Protein C level.
Special Instructions: Indwelling line should be flushed with saline and 5.0 mL of blood discarded before collecting samples for coagulation assays.Tube must be full and not clotted. Deliver to lab immediately. Samples received from an outside lab must be aliqouted and frozen. Samples aliquoted for shipping must be double centrifuged prior to freezing. Grossly hemolyzed, icteric or lipemic samples may be rejected. Levels of functional protein C will be decreased in patients taking Warfarin drugs. Patients should be off anticoagulant therapy prior to measuring protein C levels.


Search Tests

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Enter Keyword:

Search Help


Search Options for the Test Directory:

1. Enter the test name in the Keyword search field.
Hint: You can also enter any part of the test name to expand the search.
(Example: you can type "west" or "sed" or "rate" to find Westergren Sedimentation Rate)

2. Enter the Vanderbilt Test Code, if known.

3. Choose one of the letter boxes to display a list of all test names and keywords starting with that letter.

If you are unable to find a test in our directory, please contact VPLS at
1-800-551-5227 or e-mail emily.k.thompson@vanderbilt.edu.