Which term best describes the acute inability to remove metabolites from the blood, with ATN being a common cause?

Which term best describes the acute inability to remove metabolites from the blood, with ATN being a common cause?

• A. Acute renal failure
• B. Pyonephrosis
• C. Hydronephrosis
• D. ATN

Answer: (A)

This describes acute kidney injury: a sudden drop in kidney function that prevents the kidneys from efficiently clearing waste products from the blood. When metabolites like urea and creatinine build up, that reflects the kidneys’ reduced filtering ability. ATN (acute tubular necrosis) is a common intrinsic cause of this syndrome, meaning it’s one specific pathology inside the kidneys that can lead to acute kidney injury. However, the broad term for the situation—impaired ability to remove metabolites from the blood—is acute renal failure (often now called acute kidney injury). The other options point to obstructive or infectious processes rather than a failure to clear metabolites: hydronephrosis is dilation from obstruction, and pyonephrosis is infected obstructed collecting system.

This describes acute kidney injury: a sudden drop in kidney function that prevents the kidneys from efficiently clearing waste products from the blood. When metabolites like urea and creatinine build up, that reflects the kidneys’ reduced filtering ability.

ATN (acute tubular necrosis) is a common intrinsic cause of this syndrome, meaning it’s one specific pathology inside the kidneys that can lead to acute kidney injury. However, the broad term for the situation—impaired ability to remove metabolites from the blood—is acute renal failure (often now called acute kidney injury).

The other options point to obstructive or infectious processes rather than a failure to clear metabolites: hydronephrosis is dilation from obstruction, and pyonephrosis is infected obstructed collecting system.