A nurse is reviewing laboratory results for a client who is receiving IV furosemide. Which of the following results indicates a therapeutic response to the medication?

A. Increased calcium level: Furosemide is a loop diuretic that promotes the excretion of electrolytes, including calcium. An increased calcium level would not indicate a therapeutic response and may suggest another metabolic issue. B. Decreased urine specific gravity: Furosemide increases urine output by inhibiting sodium and water reabsorption in the loop of Henle. A decreased urine specific gravity reflects more dilute urine, which indicates effective diuresis and a therapeutic response. C. Decreased liver enzymes: Furosemide does not have a direct effect on liver enzyme levels. Changes in liver enzymes would not reflect the effectiveness of the diuretic therapy. D. Increased serum sodium level: Loop diuretics like furosemide can lead to sodium loss rather than an increase. An elevated serum sodium level would not indicate a therapeutic effect of the medication.