Operations were fulfilled in 420 patients with acute cholecystitis, 132 of them having obstructive jaundice. Only two patients were operated urgently due to peritonitis. In the other 130 patients forced diuresis and rational antiinflammatory therapy with antibiotics were used resulting in subsiding acute phenomena and liquidation of jaundice. It created the conditions for valuable examination of the patients and for performing operations under favourable conditions with respect to the cold period. The postoperative lethality in the cold period was 3.1%.