Interpretation of Urine Electrolytes and Osmolality
نویسنده
چکیده
A. S. Reddi, Fluid, Electrolyte and Acid-Base Disorders, DOI 10.1007/978-1-4614-9083-8_2, © Springer Science+Business Media New York 2014 Measurement of urine Na + , Cl − , and K + is rather common in hospitalized patients, and these urine electrolytes are useful in the diagnostic evaluation of volume status, hyponatremia , acute kidney injury (AKI) , metabolic alkalosis, hypokalemia and urine anion gap (urine net charge). A spot urine sample is generally adequate for determination of these electrolytes. In addition, urine creatinine is determined to calculate the fractional excretion of Na + , K + , or other electrolytes. Also, urine osmolality is helpful in the differential diagnosis of hyponatremia , polyuria, and AKI. Table 2.1 summarizes the clinical applications of urine electrolytes and osmolality.
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