Morbidity, mortality, and risk factors of emergency colorectal surgery among older patients in the Acute Care Surgery service: A retrospective study.

backgroundAcute Care Surgery (ACS) is a rapid response system in emergency surgical conditions. The patients who over 60 year-old have numerous factors associated with high mortality and morbidity in emergency colorectal surgery. We aimed to identify potentially preventable risk factors, to improve patients' outcomes.

methodsA retrospective review of patients age over 60 year-old undergoing emergency colorectal surgery in the ACS service from August 1, 2017 through November 30, 2019.

resultsNinety-two patients were analyzed, average age 72.41 years. The most common diagnosis was complicated colorectal cancer (76, 83.52%) with locations on the right (37, 41.51%), left (35,39.33%), and rectum (17, 19.10%). Clinical presentations were obstruction without perforation (61, 67.03%), perforation (25, 27.17%), and ischemia (2, 2.17%). Overall mortality was 6.52%. Cause of death included septic shock (3, 50%); respiratory failure (3, 50%); and pulmonary embolism (1, 16.67%). Morbidity from surgical and medical complications were 41.30% and 26.08%, respectively. For all causes, operations included resection with primary anastomosis (62, 71.26%); Hartmann's operation (11, 12.64%); and loop colostomy (12, 13.79%). Average operative time was 159.86 min. In emergency colorectal surgery, pre-existing heart disease, clinical perforation, and ventilator dependency increased risk of death 7.6-, 16.5-, and 0.08-fold, respectively.

conclusionClinical perforation leads to sepsis and septic shock in older patients, this may be modifiable to improve mortality by developing an early, rapid, protocol-driven surgical sepsis fast-track process. Ventilator dependency is potentially modifiable with postoperative advanced surgical critical care. The non-modifiable risk factor of co-morbid heart disease might be improved by postoperative advanced critical care for close monitoring.