At research of rules of deviations of the parameters homeostasis for patients with bleedings we pursued to find dependence of the parameters of homeostasis from function of kidneys. The researches were carried out in the early posthemorrhagic period on an example of inspection of the patients who were operated concerning gastrointestinal and intraabdominal hemorrhages. Is revealed, that the renal insufficiency, which arose at 23.21% surveyed, proceeded without oliguria--in the neoliguric form. It was characterized by normal speed diuresis, despite of the essential damages of the function of nephron: infringement of a primary filtration in glomerulus, reabsorption of water and electrolytes in tubules, restriction of excretion H+. Normal diuresis in such cases was explained by the early and duly beginning of the infusion therapy, owing to what, probably, the infringement of passableness tubules was prevented. Despite of it, the patients with the damaged function of kidneys require the careful control of spent therapy because of an opportunity of dangerous deviations of the parameters homeostasis of norm. Confirmation it became the reduction, fixed at such patients, clearance of electrolytes, infringement of the extraction of acid by kidneys.