Potassium - urine
Last updated: Thursday, 25, March, 2004
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Random or 24 hour urine specimen.
ISE or flame emission spectrophotometry.
| Reference Interval|
40-100 mmol/24 hours (varies with intake).
|Application||Differentiation of renal potassium loss from other causes of hypokalaemia.|
Mineralocorticoid excess, some renal tubular disorders, metabolic alkalosis, some diuretics and Bartter’s syndrome cause renal potassium loss.
With decreased intake or increased GIT loss, renal potassium loss is decreased.
|Reference||Ethier JH et al. Am J Kid Dis 1990; 15: 309-315.|