C-Peptide, Other
Also known as: CPEPOTHER
Use
Aid in the detection of insulinoma. May aid in distinguishing type 1 from type 2 diabetes mellitus (DM) in ambiguous cases. This test is used to evaluate C-peptide levels, which can offer insights into endogenous insulin production and help differentiate between different types of diabetes as well as monitor treatment efficacy in conditions like insulinoma.
Special Instructions
Fasting specimen preferred for optimal results. Blood should be collected into a serum separator tube and allowed to clot at room temperature. The specimen should be separated from cells as soon as possible and no later than two hours post-collection for accurate results.
Limitations
The test should not be used as the exclusive basis for diagnosing diabetes mellitus (DM). While C-peptide levels can provide valuable insights, they do not directly indicate blood glucose levels or give a complete picture of insulin activity. Additionally, results may be influenced by factors such as improper blood sample handling, hemolysis, or patient preparation, potentially leading to inaccurate readings.
FDA ApprovedNew York Approved
Methodology
Immunoassay (CLIA)
Biomarkers
LOINC Codes
- 1986-9
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 mL
Container
Serum Separator Tube (SST)
Collection Instructions
Allow specimen to clot completely at room temperature. Separate from cells ASAP or within 2 hours of collection. Transport in an ARUP Standard Transport Tube.
Patient Preparation
Fasting specimen preferred.
Causes for Rejection
Grossly hemolyzed specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 8 hours |
| Refrigerated | 7 days |
| Frozen | 1 month |