[Mechanism of the anti-ischemic protection of the kidneys by diuretics]

Experiments on rats showed that single doses of diuretics furosemide, ethacrynic acid, mannitol, hypertonic solution of sodium chloride administered subcutaneously 30 and 60 min and intravenously 10 and 20 min before complete arrest of the blood flow in the single kidney for 2.5 hours decrease creatinine content in the blood and increase survival rate of the animals. The anti-ischemic protection occurs provided that the natriuretic effect of the drugs coincides with the ischemic factor action. Morphometry revealed the ability of furosemide to prevent the development of hyperhydration of the epithelial cells, to increase lumina of the proximal and distal tubules. The role of hydrodynamic factors in the mechanism of anti-ischemic protection of the kidneys with diuretics is discussed.