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C-Peptide Stimulation by Glucagon
Test Code14747
CPT Codes
84681 (x4)
Includes
Baseline, 5 minutes, 10 minutes, 15 minutes
Preferred Specimen
2 mL frozen serum for each timed specimen
Patient Preparation
Overnight fasting is required
Minimum Volume
0.4 mL for each timed specimen
Instructions
For each timed specimen submitted, each tube must be clearly marked with time drawn. Submit all tubes with one test request form.
Draw baseline fasting specimen. Administer 1 mg Glucagon by I.V. Draw additional samples at 5,10 and 15 minutes.
Glucagon is not supplied by Quest Diagnostics, Incorporated, Nichols Institute
Draw baseline fasting specimen. Administer 1 mg Glucagon by I.V. Draw additional samples at 5,10 and 15 minutes.
Glucagon is not supplied by Quest Diagnostics, Incorporated, Nichols Institute
Transport Temperature
Frozen
Specimen Stability
Room temperature: 24 hours
Refrigerated: 7 days
Frozen -20° C: 28 days
Frozen -70° C: 12 months
Refrigerated: 7 days
Frozen -20° C: 28 days
Frozen -70° C: 12 months
Methodology
Immunochemiluminometric Assay (ICMA)
Setup Schedule
P.M. Sets up 5 days a week.
Report Available
Reports in 2 to 5 days.
Clinical Significance
C-Peptide Stimulation by Glucagon is useful in assessing patients for pancreatic beta cell function and reserve. Patients with Type I diabetes mellitus have decreasing reserves of beta cell function.
