Synonym/Acronym:
connecting peptide insulin, insulin C-peptide, proinsulin C-peptide.
Rationale
To evaluate hypoglycemia, assess beta cell function, and monitor insulin production.
Patient Preparation
There are no fluid, activity, or medication restrictions unless by medical direction. Instruct the patient to fast for at least 10 hr before specimen collection. Protocols may vary among facilities.
Normal Findings
Method: Immunochemiluminometric assay (ICMA).
| Age | Conventional Units | SI Units (Conventional Units × 0.333) |
|---|---|---|
| Child | 0–3.3 ng/mL | 0–1.1 nmol/L |
| Adult | 0.8–3.5 ng/mL | 0.3–1.2 nmol/L |
| 1-hr response to glucose | 2.3–11.8 ng/mL | 0.8–3.9 nmol/L |
Critical Findings and Potential Interventions
N/A
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