Hiroyuki Murayama

Background: Several large-scale studies have assessed endovascular and surgical treatment methods for nonocclusive mesenteric ischemia (NOMI); however, the prognostic factors for NOMI remain unclear. Therefore, this study aimed to evaluate risk factors for in-hospital mortality among patients with NOMI who underwent laparotomy and to examine therapeutic strategies that may improve the prognosis. Materials and methods: In this multicenter retrospective study, the authors reviewed the electronic medical records retrieved from the inpatient database of patients with NOMI at eight district general hospitals between January 2011 and January 2021. A total of 88 patients who underwent laparotomies were divided into survivor and nonsurvivor groups, and statistical analysis was performed to determine clinical and physiological factors. Results: Exploratory laparotomy based on second-look surgery was the first treatment choice. The overall mortality rate was 48.8%, with a male-to-female ratio of 1.1:1. The median Sequential Organ Failure Assessment (SOFA) score was 8 [interquartile range: 3.75–14.2], and the median SOFA scores were 5 [3–7] in the survivor group and 13 [9–17.5] in the nonsurvivor group. Univariate analysis revealed a significant difference in BMI (PP=0.0012), previous cardiovascular surgery (P=0.0019), catecholamine use (PPP=0.0023), and lactate level (PP=0.013) was an independent prognostic factor. In addition, catecholamine use was suggested as a factor with a SOFA score greater than or equal to 10. Conclusion: This study confirmed that a SOFA score of greater than or equal to 10 may be associated with increased mortality. While closely monitoring low blood pressure and renal dysfunction, survival rates may be improved if surgical intervention is performed before the SOFA score reaches greater than or equal to 10.