WHAT IS POTASSIUM (URINE) TEST?
Potassium (K) is the major intracellular cation. The body obtains potassium through dietary ingestion, and the kidneys either preserve or excrete it, depending on cellular need. Potassium is responsible for the regulation of cellular water balance, electrical conduction in muscle cells, and acid-base homeostasis. A 24-hour urine collection is obtained to determine excreted potassium levels. Urine potassium levels are helpful in the assessment of endocrine abnormalities and renal tubular function.