Normal Reference Ranges
Adult
20 - 80 (diet-dependent) mEq/L
Pediatric
Same as adult mEq/L
Clinical Significance
Aids in evaluating the etiology of hypokalemia. High urine potassium (> 20 mEq/L) in the presence of hypokalemia indicates renal potassium wasting.
Causes of High
- Primary Aldosteronism (renal potassium wasting)
- Renal Tubular Acidosis (RTA)
- Diuretics
Causes of Low
- Gastrointestinal potassium loss (diarrhea)
- Low dietary intake