Fibroblast Growth Factor 23
Also known as: FGF-23 C-Terminal Fragment
Use
This test is used for measurement of Fibroblast Growth Factor 23 in plasma.
Special Instructions
A morning 12-hour fasting sample is recommended but not required. The test measures both the intact FGF-23 and its C-terminal fragments using a second-generation C-terminal assay.
Limitations
This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration. The presence of gross lipemia or non-EDTA plasma samples can lead to rejection. It measures both intact FGF-23 and its fragments, which may limit specificity.
Methodology
Immunoassay (ELISA)
Biomarkers
LOINC Codes
- 46699-5
- 46699-5
Result Turnaround Time
4-10 days
Related Documents
For more information, please review the documents below
Specimen
Plasma
Volume
1 mL
Minimum Volume
0.3 mL
Container
Lavender-top (EDTA) tube
Collection Instructions
Separate plasma from cells within 60 minutes and transfer to a plastic transport tube.
Patient Preparation
A morning 12-hour fasting sample is recommended but not required.
Storage Instructions
Refrigerate.
Causes for Rejection
Gross lipemia; nonplasma sample received; plasma sample received that is not EDTA
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 16 hours |
| Refrigerated | 14 days |
| Frozen | 14 days |