Anatomy & Physiology Genitourinary #18

Question

Which daily urine output requires further evaluation?

Answers

  1. 400 mL/day
    • Rationale:

      A urine output of less than 800 mL (e.g., 400 mL) in a 24 hour period (or less than 30 mL/hour) is abnormal; therefore, would require additional evaluation.

  2. 800 mL/day
    • Rationale:

      While this urine output value is the low end of normal, it does not require further evaluation in the absence of other clinical manifestations.

  3. 1200 mL/day
    • Rationale:

      This urine output is within the normal range expected for an adult during a 24 hour period; therefore, this finding does not require further evaluation.

  4. 1600 mL/day
    • Rationale:

      This urine output is within the normal range expected for an adult during a 24 hour period; therefore, this finding does not require further evaluation.

Overview

Abnormal urine output can be caused by many different health conditions within the body.

Explanation

Learning Outcomes

Knowing normal ranges for urine output is essential to determine when issues occur as a result of organ system malfunction. The normal range for urine output in a 24 hour period is 800 to 2,000 mL per day. Urine output that is either above or below (e.g., 400 mL/day) this range would require further evaluation.

Test Taking Tip

Review each answer choice and ask yourself, “Is this too little or too much urine output?” to assist in answering this question correctly.

Video Rationale