Impact of surgical proficiency levels on postoperative morbidity: a single centre analysis of 558 ileostomy reversals.

Abstract

Defunctioning ileostomies reduce the consequences of distal anastomotic leakage following bowel resections. Ileostomy reversal in itself, however, is associated with appreciable morbidity (3-40%) and mortality (0-4%). Despite being a common teaching procedure, there is limited information on the impact of surgical proficiency levels on postoperative outcome. Adult patients undergoing closure of a defunctioning ileostomy between September 2008 and January 2017 were identified from a surgical administrative database that was collected prospectively (n= 558). Baseline characteristics (age, ASA score, BMI, health care insurance coverage) and closure techniques were recorded. Operation time, rate of bowel resection, postoperative complications ranked by Clavien-Dindo classification and length of stay were analysed with respect to proficiency levels (residents vs. consultants). Two hundred three ileostomy reversals were performed by residents; 355 ileostomies were closed by consultants. Operation time was considerably shorter in the consultant group (p< 0.001). Major postoperative complication rates however were not different among the groups when adjusted for possible confounders (p= 0.948). The rate of anastomotic leakage was 3% and the overall major morbidity rate was 11%. Operation time rather than surgical outcome and overall morbidity were affected by surgical proficiency levels. Therefore, ileostomy reversal can be considered an appropriate teaching operation for young general surgery trainees.