Difficulty: Medium
Average Score: 93%
Full-length
Following cardiac surgery, a client's urine output for the last hour is 20 mL. The nurse understands that this indicates which of the following?
Correct answer
B
Rationale
Low urine output (20 mL/hour) post-cardiac surgery suggests insufficient cardiac output, impairing renal perfusion. Hyperkalemia, inadequate fluids, or diuresis are less likely causes without additional signs.