Potassium - Deficiency Test
The potassium test is a quantitative test that measures urine levels of potassium, a major intracellular cation that helps regulate acid-base balance and neuromuscular function. Potassium imbalance may cause such signs and symptoms as muscle weakness, nausea, diarrhea, confusion, hypotension, and electrocardiogram changes; severe imbalance may lead to cardiac arrest.
Most commonly, a serum potassium test is performed to detect hyperkalemia (abnormally high levels) or hypokalemia (abnormally low levels). A urine potassium test may be performed to evaluate hypokalemia when a history and physical examination fail to uncover the cause. If results suggest a renal disorder, additional renal function tests may be ordered.
Procedure and posttest care
Normal potassium excretion in adults is 25 to 125 mEq/24 hours, or 25 to 125 mmol/24 hours. In children, normal excretion is 22 to 57 mmol/24 hours.
In a patient with hypokalemia, potassium concentration less than 10 mEq/L suggests normal renal function, indicating that potassium loss is most likely the result of a GI disorder such as malabsorption syndrome.
In a patient with hypokalemia lasting more than 3 days, urine potassium concentration above 10 mEq/L indicates renal loss of potassium. These losses may result from such disorders as aldosteronism, renal tubular acidosis, or chronic renal failure. However, extrarenal disorders, such as dehydration, starvation, Cushing's disease, or salicylate intoxication, may also elevate urine potassium levels.
Vitamins || Feedback || Nutritional Blog ||
(c)Copyright Vitamins-minerals-supplements All rights reserved.
Disclaimer: Material provided on vitamins-minerals-supplements.org website is provided for educational purposes only. It is not intended to treat, diagnose, cure, or prevent any disease. Always take the advice of your doctor before undertaking any diet, exercise, or other health program. We will not be liable for any complications, or other medical accidents arising from the use of any information on this web site.