Potassium - 24 hour urine
Also Known As
Test Parameters Included
- Urine Potassium Concentration (mEq/L or mmol/L) - 24-hour total excretion
- Pathologist Renal & Electrolyte Remark - correlated with dietary intake and renal function
Department
Methodology
Sample Required
Preparation
Schedule Report
24 Hours
Emergency Report
Yes
Frequently Asked Questions
Do I need to fast for 24-hour urine potassium?
No fasting is required, but maintain your normal diet and fluid intake unless your doctor advises otherwise.
How is the sample collected?
You void and discard the first morning urine, then collect all urine for the next 24 hours, including the first void of the next day, in a provided container with preservative.
What does abnormal result indicate?
Low excretion may suggest adrenal insufficiency, kidney disease, or potassium-wasting diuretic use; high excretion may indicate hyperaldosteronism, renal tubular acidosis, or diuretic therapy.
How long for report?
Results are available within 24-48 hours after the complete collection is received at the lab.
Can medications affect results?
Yes, diuretics, ACE inhibitors, NSAIDs, and potassium supplements can alter urinary potassium; inform your doctor about all medications.
Does stress affect potassium excretion?
Acute stress can transiently increase potassium excretion via catecholamine release, but 24-hour collection averages out short-term fluctuations.
Test Description
Test Code
P11
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