Test ID: Z0289
CPT code: 85302
LOINC: 27820-0
Specimen Type: Blue-top (sodium citrate plasma) tube (2)
Frequency: 2 – 4 days
Instructions: 1 mL Plasma from Blue-top (sodium citrate plasma) tube, Frozen
Text: Confirmation & characterization of protein C deficiency. Individuals with heterozygous PC deficiency may have low normal PC levels. Treatment with warfarin decreases the levels of vit K-dependent factors including PC. PC levels drop after six hours of warfarin treatment & do not regain pretreatment levels until generally 2 weeks after cessation of therapy.
Methodology: Enzyme Immunoassay (EIA)