Clinical Features and Outcomes of Patients With Acute Mesenteric Ischemia and Concomitant Colon Ischemia: A Retrospective Cohort Study

Abstract

BackgroundEarly identification of patients with acute mesenteric ischemia (AMI) involving the large bowel may play a decisive role in improving the prognosis of AMI. This study aims to compare the outcomes between patients with isolated AMI and AMI patients with colon involvement (CI) and to identify the predictors of worse outcomes. The different surgical modalities for AMI patients with CI were also evaluated. MethodsThis retrospective cohort study included 199 AMI patients admitted from January 2005 to January 2014. Based on colonoscopy and pathology reports, 39 patients were diagnosed as AMI with CI, and 160 were AMI patients without CI. The clinical outcomes and different surgical modalities were compared. Risk factors of 30-d mortality and short bowel syndrome (SBS) were identified. ResultsThe 30-d mortality (10% versus 49%, P < 0.01) and SBS incidence (19% versus 49%, P < 0.01) were higher in AMI patients with CI than AMI patients without CI. AMI patients with CI have higher rate of bowel resection (68% versus 95%, P < 0.001) and second-look laparotomy (25% versus 54%, P < 0.001) than patients with AMI alone. For AMI patients with CI, emergent laparotomy was associated with shorter hospital stay (P = 0.04) and less incidence of SBS (74% versus 25%, P < 0.001) than initial endovascular therapy. Patients with ostomy had less repeated bowel resection (11% versus 63%, P = 0.001) and rate of SBS (21% versus 79%, P < 0.001) than patients with primary bowel anastomosis. Serum procalcitonin level and colon ischemia were risk factors of 30-d mortality and SBS for AMI. ConclusionsAMI patients with CI represent a special cohort of AMI patients with higher risk of poor outcome. Compared to initial endovascular therapy, emergent laparotomy was associated with shorter length of hospital stay and reduced incidence of SBS.