Preferred Specimen(s) 1.0 mL Serum
Instruction Overnight fasting is required
Transport Container Plastic screw cap vial
Transport Temperature Frozen
Reject Criteria
- Grossly hemolysed,
- Cord blood
Methodology Chemiluminescent Enzyme Immunoassay
Clinical Significance C-Peptide is useful in distinguishing insulin-secreting tumors, i.e., insulinomas, from exogenous insulin administration. C-Peptide concentrations are severely depressed or absent in Type I diabetes mellitus. C Peptide is also useful in monitoring patients who have received islet cell or pancreatic transplants.