Laboratory Test Information Guide

Details for C-Peptide, Plasma/Serum

Test Name: C-Peptide, Plasma/Serum
Alternate Name(s): C Peptide
Laboratory: Core
Specimen Type: Adult:
4.5 mL Light Green top (Li-Heparin) Vacutainer tube

Pediatric:
0-2 years: 0.5 mL Light Green top (Li-Heparin) Microtainer
2-10 years: 3 mL Light Green top (Li-Heparin) Vacutainer tube

Red, Gold, or Lavender (EDTA) top tubes are also acceptable
Collection Information: Minimum volume of plasma or serum required is 700 ÁL for adult samples or 200 ÁL for pediatric samples.
Requisition: GENERAL LABORATORY REQUISITION
Test Schedule: Monday - Friday
0800-1600
Turnaround time from when specimen
is received in testing laboratory:
 
Routine
5 days
Stat
 
 
Reference Range: 370-1470 pmol/L
Effective Date: 2018-03-06
Revised Date: 2018-08-17
Critical Value:  
Interpretive Comments: Increased with excess secretion of endogenous insulin. Can be used to diagnose self-induced insulin hypoglycemia.
Special Processing:  
Comments: Biotin may interfere with this test. Samples should not be taken from patients receiving high biotin doses (i.e. > 5 mg/day) until at least 8 hours after the last biotin administration.
Method of Analysis: Roche Electrochemiluminescence
Critical Information Required:  
Storage & Shipment: Store and ship plasma or serum frozen.
System Codes: 
Cerner
CPEP
 
Referred To:  

Questions? Comments? Contact Laura Gopaul