Retrospective multi-center study of robotic-assisted cholecystectomy: after-hours surgery and business-hours surgery outcomes.

The effect of robotic-assisted cholecystectomy (RAC), when performed after hours, on perioperative outcomes has not been evaluated against outcomes achieved during normal business hours. Subjects 18-80 years old who underwent da Vinci robotic-assisted cholecystectomy from August 2018 to February 2021 were included. Baseline and 30-day perioperative outcomes were retrospectively and consecutively collected and analyzed. Inverse probability treatment weighting (IPTW) was performed to balance patient characteristics between groups. A weighted comparative analysis was followed. Outcomes from 505 patients (after hours, n = 169; business hours, n = 336) undergoing RAC across 5 U.S. medical institutions were analyzed. The higher rates of acute cholecystitis and gallbladder inflammation, gangrene, and intraoperative abnormalities in the after-hours group were associated with higher rates of urgent cases and longer operative times-but not increased complication rates-compared to the business-hours group. There were no significant differences in rates of intraoperative or postoperative complications, readmissions, or reoperations. Integrated da Vinci Firefly fluorescence imaging system was used extensively, and the critical view of safety was achieved in > 96% of cases in both groups. No conversions occurred in the after-hours group compared to four conversions in the business-hours group (p = 0.0266). After-hours patients had shorter outpatient lengths of stay. No mortalities were reported for either group (p = 0.0139). After-hours RAC with integrated da Vinci Firefly imaging performed by surgeons experienced in RAC is associated with similar or improved outcomes than the same procedures during business hours in terms of complications, conversions, readmissions, reoperations, and length of stay. ClinicalTrials.gov identifier: NCT04551820; August 5, 2020.