Adult Critical Care Specialty (ACCS) Practice Exam

What is the average urine output per hour in a healthy adult?

1. 20 mL

2. 30 mL

3. 40 mL

4. 50 mL

The correct answer is: 40 mL

The average urine output per hour in a healthy adult is typically around 30 to 50 mL. Therefore, when selecting the correct answer, understanding the range is crucial. An average urine output of 40 mL falls within this established range, indicating adequate kidney function and proper hydration status. In clinical practice, a urine output of less than 30 mL per hour may signal potential kidney dysfunction or inadequate fluid intake, while consistently exceeding 50 mL may indicate overhydration or a requirement for further fluid assessments. Therefore, while 30 mL is often noted as a minimum acceptable urine output for monitoring, identifying 40 mL as representative of average hourly output aligns with physiological norms often referenced in critical care settings. This contextual understanding aids healthcare professionals in evaluating patient status and ensuring effective management of fluid balance and renal function.