Age, Blood Urea Nitrogen, and Lactate: Preoperative Risk Factors of Laparotomy for Strangulated Small Bowel Obstruction.

Introduction: Despite increasing reports of laparoscopy for strangulated small bowel obstruction (SSBO), there is no consensus on outcomes in patients with SSBO. We evaluated the safety and utility of laparoscopy for SSBO and investigated the preoperative risk factors for laparotomy. Methods: This retrospective study included 107 patients who underwent emergency surgery for SSBO over a period of 6 years. Patients' characteristics and surgical parameters were compared between 27 patients undergoing laparoscopy alone (group L) and 80 patients undergoing laparotomy (group O, including conversion). Univariate and multivariate analyses were performed to determine risk factors for laparotomy. Results: Compared with group L, group O had significantly shorter operation time (59 vs 115 minutes, P < .001), shorter postoperative hospital stay (6 vs 10 days, P < .001), and fewer complications (3 vs 40 cases, P < .001). Age >= 68 years (odds ratio [OR] 3.970, P = .021), blood urea nitrogen (BUN) >= 14.6 mg/dL (OR 4.360, P = .012), and lactate >= 2.80 mmol/L (OR 12.90, P = .023) were independent risk factors for laparotomy. Conclusion: Prognosis was better in patients with SSBO undergoing complete laparoscopy than in patients undergoing laparotomy; however, age, BUN, and lactate were independent preoperative risk factors for laparotomy.