Phosphate (urine)
| Category | Biochemistry |
|---|---|
| Test background |
Renal stones affect on average between 12-15 % of Caucasians (this figure varies among other population groups). Recurrence rates of up to 50 % within 5 years are not uncommon. Risk factors for recurrent renal calculi include low urine output, impaired renal function, hypophosphataemia and hypomagnesaemia, in addition to increased uric acid turnover, hypercalcaemia and hyperoxaluria. |
| Clinical Indications |
Recurrent stone formation and/or family history of stone formation Phosphate testing is often performed as a follow-up to an abnormal calcium level and/or related symptoms, such as fatigue, muscle weakness, cramps or bone problems |
| Reference range | 13-42 mmol/24 h |
| Sample & container required | 24 hour urine collection acidified |
| Sample volume | 24 hour urine collection |
| Turnaround time | 2 days |