Which term describes rapid loss of kidney function that occurs over hours to days and is abbreviated ARF?

• A. Acute Renal Failure
• B. Acute Kidney Injury
• C. Chronic Kidney Disease
• D. Renal Calculus

Answer: (A)

Rapid loss of kidney function that develops over hours to days is described by Acute Renal Failure. ARF stands for this term, reflecting a sudden decline in how the kidneys filter blood. In current practice, the same condition is often called Acute Kidney Injury, but the prompt explicitly uses ARF, so Acute Renal Failure is the best fit. The other options don’t describe a sudden decline: Chronic Kidney Disease implies long-term, progressive loss over months to years, and Renal Calculus refers to a kidney stone, which is a mechanical obstruction rather than an abrupt kidney function drop.