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To evaluate electrolyte balance, acid-base balance, and hypokalemia.
There are no food, fluid, activity, or medication restrictions unless by medical direction. Usually, a 24-hr urine collection is ordered. As appropriate, provide the required urine collection container and specimen collection instructions.
Method: Ion-selective electrode.
|Age||Conventional Units||SI Units (Conventional Units × 1)|
| Male||17–54 mEq/24 hr or mmol/24 hr||17–54 mmol/24 hr|
| Female||8–37 mEq/24 hr or mmol/24 hr||8–37 mmol/24 hr|
|10–14 yr||18–58 mEq/24 hr or mmol/24 hr||18–58 mmol/24 hr|
|Adult–older adult||26–123 mEq/24 hr or mmol/24 hr||26–123 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.|
Critical Findings and Potential Interventions
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Bladh, Mickey Lynn., and Anne M. Van Leeuwen. "Potassium, Urine." Davis's Lab & Diagnostic Tests, 7th ed., F.A. Davis Company, 2017. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425330/all/Potassium__Urine.
Bladh ML, Van Leeuwen AM. Potassium, Urine. Davis's Lab & Diagnostic Tests. 7th ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425330/all/Potassium__Urine. Accessed October 23, 2019.
Bladh, M. L., & Van Leeuwen, A. M. (2017). Potassium, Urine. In Davis's Lab & Diagnostic Tests. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425330/all/Potassium__Urine
Bladh ML, Van Leeuwen AM. Potassium, Urine [Internet]. In: Davis's Lab & Diagnostic Tests. F.A. Davis Company; 2017. [cited 2019 October 23]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425330/all/Potassium__Urine.
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