[The effect of acute ischemia on the small intestine of the dog]

There were carried out macroscopic and microscopic observations of dog's small intestine after putting a clamp on the artery only or on the artery and the upper mesenteric vein. Examinations were performed after 1 and 2 h of ischemia and in different periods after restitution of circulation. By means of histologic and histochemical methods it was found out that no later than after 1 h of ischemia there occur pathologic, irreversible changes in the wall of the small intestine.