ARUP's Laboratory Test Directory
| 0030113: Protein C, Functional |
| Test Mnemonic: PROT C F | |
|
Methodology: Clotting
Performed: Sun-Sat Reported: 1-2 days |
| Specimen Required: | |
|
Collect: One 5 mL lt. blue (sodium citrate). Refer to the Hemostasis/Thrombosis Specimens section in the front of this User's Guide for specimen collection instructions.
Transport: 2 mL platelet-poor plasma, frozen. (Min: 1 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 1 mL platelet-poor plasma, frozen. Submit specimen in an ARUP Standard Transport Tube. Remarks: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Unacceptable Conditions: Serum and nonfrozen or hemolyzed specimens. Stability: Ambient: 2 hours; Refrigerated: 4 hours; Frozen: 2 weeks |
|
| Reference Interval: |
|
1-4 days: 17-53% 5-29 days: 20-64% 30-89 days: 21-65% 90-179 days: 28-80% 180-364 days: 37-81% 1-6 years: 40-92% 7-9 years: 56-144% 10-11 years: 59-143% 12-13 years: 57-142% 14-15 years: 56-162% 16-17 years: 68-154% 18 years and older: 77-173% |
| Interpretive Data: | |
|
Patients on oral anticoagulants will have decreased functional protein C/S values. Patients should be off oral anticoagulant therapy for two weeks for accurate measurement of functional protein C/S levels. Interfering Factors: Artifactually decreased functional protein C values may be seen in patients with abnormally elevated levels of factor VIII. Artifactually increased levels of functional protein C/S values may be seen in patients on heparin therapy. |
| CPT Code(s): | |
| 85303 |