Progressive Care Nursing Certification (PCCN) Practice Exam

In the oliguric phase of acute renal failure, what is the urine output?

1. Less than 400 ml per day

2. Greater than 500 ml per day

3. Totally ceases

4. Not measured

The correct answer is: Less than 400 ml per day

During the oliguric phase of acute renal failure, the hallmark characteristic is a significant decrease in urine output. This phase often results in urine production of less than 400 ml per day, which indicates that the kidneys are not filtering fluid effectively. The reduced urine output can lead to a buildup of waste products in the body, contributing to various complications associated with acute renal failure. This phase typically occurs after an initial injury to the kidneys, leading to impaired renal function. Recognizing this decreased urine output is crucial for healthcare providers, as it assists in diagnosing acute renal failure and determining the appropriate interventions. In contrast, urine output greater than 500 ml per day is indicative of better renal function and does not align with the oliguric phase. The possibility of urine totally ceasing is characteristic of the anuric phase, not the oliguric phase, where some minimal output may still be present. Finally, "not measured" does not apply, as continuous assessment of urine output is vital in managing renal failure to monitor the patient's condition.