A nurse is collecting data from a client who has heart failure and is taking furosemide. Which of the following findings should indicate to the nurse that the medication is effective?

A) Decreased hemoglobin level: A decreased hemoglobin level is not an expected or desirable outcome of taking furosemide. While furosemide can cause fluid loss, it does not directly affect red blood cell production or hemoglobin levels. A decrease in hemoglobin could indicate anemia or another underlying issue, which should be addressed separately. B) Increased weight of 0.91 kg (2 lb): An increase in weight, especially in a client with heart failure, could indicate fluid retention rather than effective diuresis. Furosemide is a diuretic that helps reduce fluid buildup, so an increase in weight would typically suggest that the medication is not effectively managing fluid overload, which is a key issue in heart failure. C) Increased urinary output: An increase in urinary output is a clear indicator that furosemide is working effectively. Furosemide is a loop diuretic, which promotes the excretion of sodium and water, leading to increased urine output. This helps reduce fluid volume in the body, which is beneficial for a client with heart failure. D) Decreased BUN level: While furosemide can affect kidney function, a decrease in blood urea nitrogen (BUN) level is not a direct indicator of the medication’s effectiveness. BUN can be influenced by various factors such as hydration status, kidney function, and protein intake. A decreased BUN level does not directly correlate with furosemide's effectiveness in treating heart failure.