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Blood Sciences

Blood Test Information

C-Peptide
 
minimum sample volume required ~ 4ml

  back to assay index

Tube type: EDTA

Special instructions
Send separate Glucose (fluoride) sample.
Sent away to Royal Devon and Exeter NHS Foundation Trust

Reference range
370-1470 (For a healthy idividual with normal glucose measurment)

Units
pmol/L

Linked to
Insulin

Turnaround Time
10 days

Department: Biochemistry

Clinical Application
C-peptide is released at the time of endogenous insulin secretion. Discrepancy between c-peptide and insulin measurements can help in the differential diagnosis of hypoglycaemia (low c-peptide values seen in factitious exogenous insulin-induced disorder........................................................................................................................................................

During a hypoglycaemic episode, a C-Peptide concentration greater than 300 pmol/L is inappropriately high. (C-peptide is considered supressed if less than 94 pmol/L). Indeterminate values i.e. 94-300 pmol/L require measurement of beta hydroxybutyrate to determine if hyperinsulinism is present.

 
 

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