Calcitriol (1,25 di-OH Vitamin D)
Also known as: 1,25(OH) Vitamin D, 1,25-Dihydroxy Vitamin D, 1,25-Dihydroxycholecalciferol, Vitamin D, 1,25-Dihydroxy
Use
This test is used to aid in the diagnosis of primary hyperparathyroidism, hypoparathyroidism, pseudohypoparathyroidism, renal osteodystrophy and vitamin D-resistant rickets.
Special Instructions
This test is not the same as Vitamin D, 25-Hydroxy [081950] (vitamin D3), which must be ordered separately.
Limitations
The 25-(OH) vitamin D form of the hormone is the principal circulating reservoir in plasma and is generally the best indicator of overall vitamin D status. Heterophilic antibodies in human serum can react with reagent immunoglobulins, interfering with in vitro immunoassays. Patients routinely exposed to animals or to animal serum products can be prone to this interference, and anomalous values may be observed.
Methodology
Immunoassay (CLIA)
Biomarkers
LOINC Codes
- 62290-2
- 62290-2
Result Turnaround Time
2-4 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL
Minimum Volume
0.3 mL
Container
Red-top tube, gel-barrier tube
Collection Instructions
If tube other than a gel-barrier tube is used, transfer separated serum or plasma to a plastic transport tube.
Storage Instructions
Room temperature
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | 14 days |
| Frozen | 14 days |