In cases of acute obstruction, it may be desirable to continue constant gastric suction for several days. Following this, the patient is given fluids the first day and a soft diet for the next few days, progressively increasing to a high-vitamin, high-calorie, high-protein, low-residue diet. Early ambulation is permitted. Irrigations of the proximal colon may be given through the colostomy opening in preparation for secondary surgical procedures or to establish regular emptying of the colostomy if the colostomy is to be permanent. Following diversion of the fecal stream, the reaction about the obstructing tumor tends to subside and the obstruction may be relieved. Through-and-through irrigations for cleansing purposes may then be possible. Blood transfusions, high-calorie solutions, and Ringer's solution are given as required, depending on the degree of the patient's debility. Antibiotic therapy is discontinued after a few days or so unless the patient has a continuing infection.