Evaluate residual beta cell function in patients with diabetes mellitus treated with insulin, low in instances of surreptitious injection of insulin, elevated in insulin autoimmune hypoglycemia, workup of hypoglycemia and to aid in the diagnosis of insulinoma with glucose and insulin assays.
1.0-5.2 ng/ml (fasting)
- Connecting Peptide
- C-Peptide Reactivity
- Endogenous Insulin, Marker
- Insulin C-Peptide
- C PEPTIDE
Collect specimen in green top tube from a fasting patient (red top tube is acceptable). Place specimen on ice immediately after collection and keep cold until ready to aliquot. Centrifuge, aliquot plasma into a plastic vial and freeze within 1 hour of collection.
Fasting specimen. Place on ice immediately. Must arrive in lab or aliquot and freeze within 2 hours.