Results of a patients 24-hour urine sample indicate osmolality of 510 mOsm/kg, which is within reference range. What conclusion can the nurse draw from this assessment finding?

(A) The patients kidneys are capable of maintaining acidbase balance. (B) The patients kidneys reabsorb most of the potassium that the patient ingests. (C) The patients kidneys can produce sufficiently concentrated urine. (D) The patients kidneys are producing sufficient erythropoietin.Answer Explanation: Osmolality is the most accurate measurement of the kidneys ability to dilute and concentrate urine. Osmolality is not a direct indicator of renal function as it relates to erythropoietin synthesis or maintenance of acidbase balance. It does not indicate the maintenance of healthy levels of potassium, the vast majority of which is excreted.