Indications and procedures for second-look surgery in acute mesenteric ischemia.

Acute mesenteric ischemia (AMI) is a highly lethal clinical entity associated with high morbidity and mortality. Bowel necrosis often results, usually necessitating bowel resection; however, deciding on the extent of resection is problematic as accurate identification of ischemic bowel that may undergo subsequent infarction is difficult. Therefore, a second-look laparotomy after the first operation is usually recommended. While the second-look procedure is widely accepted, its optimal indications and mode are still controversial, raising questions such as "second-look or not?," "planned relaparotomy or relaparotomy on demand?," and "open or laparoscopic?" In this review we discuss the relevant literature and reassess the role of the second-look operation in the treatment of AMI.