Diasorin Chemiluminescent Immunoassay
Differential diagnosis of hypercalcemia. Levels are decreased in chronic renal failure and hypoparathyroidism and increased in sarcoidosis.
18 - 78 pg/mL
- 1,25 Dihydro Cholecalciferol
- 1,25 Dihydrocholecalciferol
- 1,25-dihydroxy Vitamin D
Collect specimen in SST (preferred) or red top tube from a fasting patient (a fasting specimen is recommended, but not required). Centrifuge, aliquot serum into a plastic vial, and refrigerate up to 6 days or freeze for longer storage.
While 1,25-dihydroxy vitamin D is the most potent vitamin D metabolite, levels of the 25-OH forms of vitamin D more accurately reflect the body's vitamin D stores. Consequently, Vitamin D 25-hydroxy is the preferred initial test for assessing vitamin D status. However, in the presence of renal disease, 1,25-dihydroxy vitamin D levels may be needed to adequately assess vitamin D status.