A potassium test is used to detect abnormal concentrations of potassium, including high potassium (hyperkalemia) and low potassium (hypokalemia). It is often used as part of an electrolyte panel or basic metabolic panel for a routine physical.
Potassium urine concentrations must be evaluated in association with blood levels. The body normally eliminates excess potassium, so the concentration in the urine may be elevated because it is elevated in the blood. It may also be elevated in the urine when the body is losing too much potassium; in this case, the blood level would be normal to low. If blood potassium levels are low due to insufficient intake, then urine concentrations will also be low.
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