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C-Peptide

Methodology

The C-peptide assay is a one-step immunoenzymatic (“sandwich”) assay.

Test Utility

This test measures the level of C-peptide in a patient sample. C-peptide analysis can help determine how much insulin the body is making.

Specimen Collection and Preparation

Serum or plasma sample in the following tubes:

  • Serum separator tube (gold or tiger top)

  • EDTA (lavender top) OR Lithium Heparin (green top)

Specimen Storage and Stability

Store serum or plasma at the following temperatures:

  • Room temperature: 15°C to 25°C for no longer than 24 hours

  • Refrigerated: 2°C to 8°C for up to 48 hours

  • Frozen: -15°C or lower for up to 90 days. Thaw samples no more than 3 times.

Specimen Rejection

  • Insufficient sample volume

  • Sample not stored at proper temperature

  • Frozen whole blood

  • Severely hemolyzed samples

  • Severely lipemic specimens

  • Specimen labeled incorrectly or not labeled

Reference Pages

Performed

Monday – Saturday

Result available within 24 hours of receipt in laboratory

NOTE: Specimens are refrigerated (2-8°) for 7 days before disposal

STAT results available within 2 hours of receipt in the laboratory

Contacts

Vibra Health Laboratory

1307- A, Allen Dr

Troy, MI 48083

(248) 846-0663

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