Perioperative Outcomes and Predictors of Mortality After Surgery for Sigmoid Volvulus

Data on outcomes after surgery for sigmoid volvulus is limited. The aim of this study was to develop a model to predict need for emergent surgery and mortality after resection for sigmoid volvulus.

The NSQIP database was queried from 2012 to 2016 to identify patients undergoing segmental resection for sigmoid volvulus. Pre-, intra-, and post-operative variables were compared. Primary and secondary outcomes were emergent surgery and risk of mortality, respectively. Chi-square and Fischer's test for categorical variables and the Mann-Whitney test for continuous variables were used. Significant variables for each outcome were entered into a logistic regression model to predict the outcomes.

2086 patients met inclusion criteria. Factors associated with emergency surgery included female gender, relative hematocrit elevation, relative leukocytosis, acute kidney injury, preoperative sepsis, prior functional independence, and bleeding disorders. Laparoscopic resection and mechanical bowel preparation were more commonly used in the nonemergent setting. Patients having emergent resection were more likely to suffer from postoperative superficial surgical site infection, pneumonia, cardiac arrest, septic shock, myocardial infarction, and receive perioperative transfusion. No difference was seen in ileus, readmission or reoperation rates in the emergent and nonemergent groups. Factors predictive of postoperative mortality included increased age, systemic sepsis, and emergent surgery. Independence before illness, higher albumin levels, and lower BMI were shown to be protective.

Emergent resection is independently associated with poor postoperative outcomes and mortality. Predictors of need for emergent resection and mortality identified in this study can be used to aid in shared decision-making for patients with sigmoid volvulus.