Method of Collection:
Plain Vacutainer 5 Ml Blood (Fasting) (Transfer into plastic transport container wrap in aluminium foil paper) Ref. Range Unit 15.9 - 55.6 pg/mL
Days for reporting:
|REFERENCE RANGE: 39-193 pmol/L|
Why is the Test Done?
When calcium is high or a person has a disease that might produce excess amounts of vitamin D, such as sarcoidosis or some forms of lymphoma (because immune cells may make 1,25-dihydroxyvitamin D), 1,25-dihydroxyvitamin D usually is ordered. Rarely, this testing may be indicated when abnormalities of the enzyme that converts 25-hydroxyvitamin D to 1,25-dihydroxyvitamin D or renal disease are suspected.When vitamin D, calcium, phosphorus, or magnesium supplementation is necessary, vitamin D levels are sometimes measured to monitor treatment effectiveness.
How to prepare for the Test: