Vitamin D
|
Assay |
Vitamin D |
|
Key Words |
25-OH-Vitamin D2/3, Vit D, Total Vit D, cholecalciferol, ergocalciferol, VITD, VITDT |
|
Specimen Collection |
Serum (brown) only |
|
Turnaround time |
72hrs |
|
Test Indications |
Vitamin D is primarily requested for the investigation of metabolic bone disease. Other indications may in hyperparathyroidism, TB patients, individuals on anticonvulsant therapy, subjects on anti-retroviral therapy and those with CKD or nephrotic syndrome. |
|
Limitations/Interferences |
High levels of sample haemolysis interfere with the test and in such cases results are not reported. High protein levels can cause non-reproducible false high vitamin D results. |
|
Reference Range |
< 30 nmol/l = “Vit D <30nmol/L indicates Vitamin D deficiency” ≥ 50 nmol/l =”Vit D >50nmol/L indicates adequate Vitamin D levels” |
|
Analytical Error [1] |
6.5% |
|
N/A |
|
|
Minimum retesting interval |
Requests made within 90 days of a previous result on a patient are intervened |
