Review Question - QID 210417

A 62-year-old man presents to the emergency department concerned about a large amount of blood in his recent bowel movement. He states he was at home when he noticed a large amount of red blood in his stool. He is not experiencing any pain and otherwise feels well. The patient has a past medical history of diabetes and obesity. His temperature is 98.9°F (37.2°C), blood pressure is 147/88 mmHg, pulse is 90/min, respirations are 13/min, and oxygen saturation is 98% on room air. A physical exam reveals a non-distressed man. His abdomen is non-tender, and he has normoactive bowel sounds. The stool guaiac test is positive for blood. The patient is started on IV fluids and kept nil per os. His next bowel movement 4 hours later appears grossly normal. Which of the following interventions will most likely reduce future complications in this patient?