Which finding would best indicate adequate renal perfusion in a patient with heart failure?

Which finding would best indicate adequate renal perfusion in a patient with heart failure?

• A. Urine output 5 mL/hr
• B. Urine output 20 mL/hr
• C. Urine output 100 mL/hr
• D. Urine output 50 mL/hr

Answer: (D)

Adequate renal perfusion shows up as steady urine production, reflecting that the kidneys are receiving enough blood flow to maintain filtration. In adults, a practical target is about 0.5 mL per kilogram per hour, which often translates to roughly 30–60 mL of urine per hour depending on body size. Among the options, 50 mL per hour fits this target and indicates kidneys are being perfused well. Very low output like 5 mL/hr suggests underperfusion; 20 mL/hr is still below the desirable range; 100 mL/hr could indicate diuresis or overdiuresis and isn’t the best sign of stable perfusion in heart failure. So, 50 mL/hr is the best indicator of adequate renal perfusion.

Adequate renal perfusion shows up as steady urine production, reflecting that the kidneys are receiving enough blood flow to maintain filtration. In adults, a practical target is about 0.5 mL per kilogram per hour, which often translates to roughly 30–60 mL of urine per hour depending on body size. Among the options, 50 mL per hour fits this target and indicates kidneys are being perfused well. Very low output like 5 mL/hr suggests underperfusion; 20 mL/hr is still below the desirable range; 100 mL/hr could indicate diuresis or overdiuresis and isn’t the best sign of stable perfusion in heart failure. So, 50 mL/hr is the best indicator of adequate renal perfusion.