Laboratory Services
Connecting peptide
Print this pageUpdated Test Information:
| Test Description |
Connecting peptide
|
|
|---|---|---|
| Synonym(s) |
C- peptide, Insulin c-Peptide
|
|
| Test ID |
CPEP
|
|
| General Information |
This assay is intended for use as an aid in the diagnosis and treatment of patients with abnormal insulin secretion.
Values obtained with different assay methods should not be used interchangeably in serial testing. It is recommended that only one assay method be used consistently to monitor each patient's course of therapy. |
|
| Specimen Type |
Serum
|
|
| Specimen Requirements |
SST
|
|
| Alternate Specimen Type |
Red, Li-heparin plasma, K2EDTA
|
|
| Specimen Collection / Processing Instructions |
SST - Separate serum or plasma from cells within 45 minutes of collection. Transfer separated serum or plasma to a plastic transport tube and freeze.
|
|
| Minimum Sample Volume |
1 mL
|
|
| Pediatric Min. Volume (if applicable) |
500 uL
|
|
| Additional Processing Details |
Separate serum or plasma from cells within 45 minutes of collection. Transfer separated serum or plasma to a plastic transport tube and freeze.
|
|
| Stability |
4 hrs at 15-25 ˚C
24 hrs at 2-8 ˚C 30 days at -20 ˚C. Freeze only once. |
|
| Unacceptable Specimen Conditions |
Citrate plasma samples
|
|
| Limitations |
Samples should not be taken from patients receiving therapy with high
biotin doses (i.e. > 5 mg/day) until at least 8 hours following the last biotin administration. |
|
| Methodology |
electrochemiluminescence immunoassay ECLIA
|
|
| Estimated TAT |
0-2 days
|
|
| Testing Schedule |
Monday-Saturday
|
|
| CPT Code(s) |
84681
|
|
| Reference Range |
1.1 - 4.4 ng/mL
|
|
| Performing Lab |
Incyte Diagnostics
|
|
| LOINC Code(s) |
1986-9
|
