Test Results For:
C-Peptide (fasting)
Test Overview
- Test Name
-
C-Peptide (fasting)
- Test Code
- CPEPTF
Short Description
C-Peptide (fasting)
Test Name
C-Peptide (fasting)
Test Code
CPEPTF
Category
Immunoassay
TAT
Main Lab:
12
Hour(s)
Family Site:
<12hrs
Specimen(s)
1 x Venous blood - 5 mL Tube - Gold - SST-Serum Separator Tube
Specimen Type
SST-Serum Separator Tube
Specimen Format
Tube
Specimen Colour
Gold
Specimen Volume
5 mL
Sampling Order
2
Origin
Venous blood
Collection Time after baseline
-
Transport Temperature
-20°C
Accepted Other Specimens
Serum
TAT
Main Lab:
12
Hour(s)
Family Site:
<12hrs
Test Stability
Room Temp:
24 Hour(s)
2–8°C:
2 Day(s)
Methodology
Chemiluminescent Microparticle Immunoassay (CMIA)
Specimen Type
SST-Serum Separator Tube
Other Type of Specimen Accepted
Serum
Delay before pre-treatment
6
Transport temperature
-20°C
Test stability at room temperature
24 Hour(s)
Test stability at 2–8°C
2 Day(s)
Haemolysis interference
No
Clinical Interest
The C-peptide assay is clinically useful for assessing pancreatic beta-cell function and insulin secretion.
It can be used to differentiate between types of diabetes. Type 1 diabetes has low or undetectable levels of C-peptide, indicating reduced or absent insulin production. In type 2, normal or elevated C-peptide levels indicate insulin resistance and retained beta-cell function.
In diagnosing hypoglycaemia, it is useful to differentiate betweeninsulinoma (insulin-producing tumour) with high C-peptide levels andsham hypoglycaemia due to exogenous insulin (low C-peptide levels).
In patients being treated for diabetes, C-peptide levels indicate remaining endogenous insulin production.
Clinical Information Required
-
Patient Collection Note
-
LOINC Code
180-0, 42180-0
Outwork
No