Urine output less than 400 mL per day is classified as which condition?

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Multiple Choice

Urine output less than 400 mL per day is classified as which condition?

Explanation:
Oliguria is reduced urine production, defined as urine output less than 400 mL in 24 hours. This is lower than normal daily output (about 800–2000 mL in adults) and signals that the kidneys aren’t filtering as they should, which can be due to dehydration, reduced kidney perfusion, early kidney injury, or urinary obstruction. Anuria would indicate even less output (often <100 mL/day), dysuria describes painful or difficult urination rather than volume, and polyuria means excessive urine production (typically >2 L/day). Therefore, the described condition fits oliguria.

Oliguria is reduced urine production, defined as urine output less than 400 mL in 24 hours. This is lower than normal daily output (about 800–2000 mL in adults) and signals that the kidneys aren’t filtering as they should, which can be due to dehydration, reduced kidney perfusion, early kidney injury, or urinary obstruction. Anuria would indicate even less output (often <100 mL/day), dysuria describes painful or difficult urination rather than volume, and polyuria means excessive urine production (typically >2 L/day). Therefore, the described condition fits oliguria.

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