Association Between Adherence to a Locally Adapted Enhanced Recovery After Surgery Pathway and Perioperative Outcomes After Open Abdominal Aortic Aneurysm Repair: A Retrospective Cohort Study

Objective: Open surgical repair (OSR) remains an important treatment for abdominal aortic aneurysm (AAA), but its invasiveness contributes to substantial perioperative risk. Although Enhanced Recovery After Surgery (ERAS) pathways have improved outcomes across several surgical specialties, evidence supporting their use in open aortic surgery, particularly in Chinese clinical settings, remains limited. We, therefore, evaluated the association between adherence to a locally adapted ERAS pathway and early perioperative outcomes after elective OSR for AAA. Methods: This single-center retrospective cohort study included 182 patients who underwent elective OSR for AAA. Patients who received at least 70% of the 30 ERAS elements were assigned to the ERAS group (n = 93), whereas those who received less than 70% were assigned to the control group (n = 89). A total of 152 patients remained after 1:1 matching of the two groups using propensity score. Quantile regression and logistic regression models were used to evaluate the impact of the ERAS protocol on postoperative length of stay, 30-day mortality, ICU admission rate, hospital cost, major complications, and readmission. Results: After matching, baseline and aneurysm characteristics were generally comparable between groups. The ERAS group demonstrated a significantly reduced risk of major complications (OR = 0.33; 95% CI 0.16–0.71; p = 0.004) and postoperative nausea and vomiting (OR = 0.10; 95% CI 0.01–0.80; p = 0.030). The time to postoperative bowel movement was 1 day earlier in the ERAS group (p < 0.001). The incidence of postoperative cardiac complications was significantly lower in the ERAS group (2.6% vs. 11.8%; p = 0.028). Pulmonary complications were also markedly reduced in the ERAS group (1.3% vs. 19.7%; p < 0.001). The ERAS group was associated with a reduction in postoperative length of hospital stay by 2 days (p < 0.001) and a decrease in hospital cost by 8065 RMB (p < 0.001). Conclusions: Higher adherence to a locally adapted ERAS pathway was associated with fewer major complications, faster bowel recovery, shorter postoperative hospitalization, and lower hospital costs after elective open AAA repair. These findings support prospective multicenter evaluation and further context-specific implementation of ERAS in open aortic surgery.