Potassium, Urine is a topic covered in the Davis's Lab & Diagnostic Tests.

To view the entire topic, please or purchase a subscription.

Davis’s Laboratory and Diagnostic Tests Online, powered by Unbound Medicine, provides nurses and students access to 400+ test monographs containing reference ranges, indications, patient preparation and result interpretation. Explore these free sample topics:


-- The first section of this topic is shown below --


Urine K+.

Common Use:
To evaluate electrolyte balance, acid-base balance, and hypokalemia.

Urine from an unpreserved random or timed specimen collected in a clean plastic collection container.

Normal Findings:
(Method: Ion-selective electrode)

AgeConventional UnitsSI Units (Conventional Units × 1)
6–10 yr
 Male17–54 mEq/24 hr or mmol/24 hr17–54 mmol/24 hr
 Female8–37 mEq/24 hr or mmol/24 hr8–37 mmol/24 hr
10–14 yr
 Male22–57 mEq/24 hr or mmol/24 hr22–57 mmol/24 hr
 Female18–58 mEq/24 hr or mmol/24 hr18–58 mmol/24 hr
Adult–older adult26–123 mEq/24 hr or mmol/24 hr26–123 mmol/24 hr
Note: Reference values depend on potassium intake and diurnal variation. Excretion is significantly higher at night.Potassium excretion declines in older adults due to the decline in aldosterone levels, decline in kidney function, and effects of commonly prescribed medications that inhibit the renin-angiotensin-aldosterone system.

-- To view the remaining sections of this topic, please or purchase a subscription --