How is acute renal failure caused (ARF)?

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How is acute renal failure caused (ARF)?

This is characterized by the sudden decline in the Alteration rate of the glomerules, which limits the ability of the kidney. Metabolic wastes like urea, creatinine etc accumulates in the blood. ARF occurs in two forms-

(i) Oliguric ARF in which urine output is less than 400ml/day.

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(ii) Non olliguric ARF in which urine output is more than 400ml/day. Causes of ARF are three types

a. Pre renal: includes dehydration, hypotension and heart failure.

b. Renal: Nephritis, drug induced injury, mismatched blood transfusion.

c. Post renal: Obstruction of the urethra by stones, tumours; bladder ob­struction by hypertrophy of prostate glands.

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