(Specimen Container)
Plastic urine container (6N HCl)
(Transport Temperature)
| Temperature | Period |
|---|---|
| Room temperature | 5 days |
| Refrigerated | 35 days |
| Frozen | 6 months |
Refrigerate during and after collection. Collect urine with 25 mL of 6N HCl to maintain a pH
Urinary calcium reflects dietary intake, rate of calcium absorption by the intestine and bone resorption. Urinary calcium is used primarily to evaluate parathyroid function and the effects of vitamin D. A significant number of patients with primary hyperparathyroidism will have elevated urinary calcium. However, there are other clinical entities that may be associated with increased urine calcium: Sarcoidosis, Paget’s disease of bone, vitamin D intoxication, hyperthyroidism and glucocorticoid excess. Decreased urine calcium is seen with thiazide diuretics, vitamin D deficiency and familial hypocalciuric hypercalcem
Calcium, 24Hr Urine 150-300 mg/24hr
Creatinine, 24Hr Urine 800-1800 mg/24hr
