Specimen Requirements

Title

C-PEPTIDE

Specimen Requirement

SST (1.0 mL serum), spin to separate

Patient should fast 12 hours prior to collection

Methodology

Stability

Room Temp 4 days; Refrigerated 7 days

Reference Range

By Report*

Turnaround

1 day Setup Mon-Fri AM

Clinical Use

Evaluate residual beta cell function in patients with diabetes mellitus treated with insulin; investigate possible surreptitious injection of insulin. C-Peptide can be used in assessment of beta-cell activity in insulin-treated diabetes mellitus. Progressive exhaustion of beta-cell reserves, as monitored by C-peptide level, can be used to measure metabolic stability or “brittleness” of diabetes mellitus. In transient diabetes mellitus, the return of C-peptide concentrations to within the normal range provides evidence of remission.

Test Code

CPEP