Oliguria is:

Oliguria is:

• A. Excessive eating
• B. Green urine
• C. Excessive bilirubin in the urine
• D. Decreased urine output

Answer: (D)

Oliguria means the kidneys are making less urine than normal. It’s a sign that urine production has dropped, which can indicate dehydration, reduced blood flow to the kidneys, early kidney injury, or a urinary blockage. Clinically, you assess it by measuring how much urine is produced over a period of time and comparing it to the usual output for the species and size of the patient. This is different from polyuria, which is excessive urine production, and from anuria, which is little to no urine. The other options describe unrelated things—excessive eating, green urine, or bilirubin in the urine—so they don’t fit the concept of reduced urine output.

Oliguria means the kidneys are making less urine than normal. It’s a sign that urine production has dropped, which can indicate dehydration, reduced blood flow to the kidneys, early kidney injury, or a urinary blockage. Clinically, you assess it by measuring how much urine is produced over a period of time and comparing it to the usual output for the species and size of the patient. This is different from polyuria, which is excessive urine production, and from anuria, which is little to no urine. The other options describe unrelated things—excessive eating, green urine, or bilirubin in the urine—so they don’t fit the concept of reduced urine output.