Laboratory Medicine
Test Directory / Urine Calcium
Urine Calcium
Acidified 24 hour urine container
| Test | Urine Calcium |
|---|---|
| Common Abbreviations | UCAL |
| Profile | NA |
| Tube type | Acidified 24 hour urine container |
| Clinical Indication | Evaluation of urine calcium excretion levels can aid in the differential diagnosis of recurrent renal calculi, as well as in the differentiation of familial hypocalciuric hypercalcemia from asymptomatic primary hyperparathyroidism. |
| Specimen Type | Urine |
| Sample type | Acidified 24 hour urine |
| Minimum Volume | NA |
| Special Precautions | No special requirements |
| Stability | 4 days at 2-8°C and 2 days at 15-25°C |
| Turnaround Time | Inpatient: 6 hours Outpatient/ GP: 24 hours |
| Laboratory | York and Scarborough |
| Reference Interval | 2.50 - 7.50 mmol/24hours (Recommended by the Pathology Harmonisation Reference Group) |
| Limitations | Care should be taken when interpreting calcium results from patients who have received gadolinium containing contrast medium within the previous 24 hours, especially if the patient has impaired renal function. These samples should be assayed using a non-colourimetric technique (e.g. ion selective electrode) or the sample should be drawn prior to administration of such contrast media. |
| Notes |
