Classification of ARF
Prerenal:Hypoperfusion, functionality:55%-60%
Renal: 35%-40%
Postrenal:urinary tract:
5%
Causes of prerenal ARF
Low volume: bleeding, lost from G-I, kidney, skin, third space Low cardiac output: myocardium, valve, Systemic vasodilatation: medicine, infection, allergy,liver failure Renal arterial systole:shock, medicine,liver failure
inflammation
Depend on severity of impairment
Repair, Regeneration and Recovery
Recovery of Sublethal cells Scavenge necrotic cells and intracavitary casts Regeneration of epithelial cells: replace necrotic and
Caducous epithelial cells and components Cast
Back flow: Impaired integrity of epithelial cells
According to histology: tubular cells fall off and necrosis, cast