突然停止对某一肠段的血液供应,可能导致梗死或相对的缺血伴有粘膜损害和细菌侵入而形成持续性结肠炎。缺血性结肠炎的概念是晚近才有的。这种结肠炎必须与其它结肠炎,特别是传染性,慢性溃疡性结肠炎或局限性结肠炎相鉴别。肠的缺血性损害可能由于肠系膜动脉的主干或分支阻塞,或由于非堵塞性肠系膜动脉疾 Abrupt cessation of blood supply to a segment of the bowel may result in infarction or relative ischemia associated with mucosal damage and bacterial invasion leading to persistent colitis. The concept of ischemic colitis is recent. This colitis must be differentiated from other colitis, especially infectious, chronic ulcerative colitis or localized colitis. Intestinal ischemic damage may be due to obstruction of the trunk or branch of the mesenteric artery, or due to non-obstructive mesenteric artery disease