Robotic Liver Surgery: Technical Advantages Over Laparoscopic Technique Based on Parameters of Surgical Complexity and Perioperative Outcomes.

Introduction: In view of the limited availability, our study addresses the issue of optimal case selection for robotic liver surgery over standard laparoscopy offering an in-detail analysis of intra- and postoperative outcomes. Materials and Methods: Clinical and technical data of all consecutive cases of robotic liver surgery of a single high-volume center from 2018 to 2020 were collected prospectively. Second, we performed a retrospective analysis of all laparoscopic liver resections from 2015 to 2020. Parameters of surgical complexity were extracted and descriptive analysis and statistical hypothesis testing were performed to assess parameters of intraoperative and postoperative outcomes. Results: A total of 121 robotic resections were compared with 435 laparoscopic resections. Shorter robotic operating times were shown for segmentectomies of the right liver lobe compared with laparoscopic procedures (P = .003) with an according trend for extended resections. A shorter duration of applied Pringle's maneuver was observed for robotic procedures. This advantage was further enhanced in cases with close proximity of the tumor to major vessels. There were no significant differences in postoperative morbidity and mortality between both groups. Conclusion: Our study offers the first in-detail analysis of intraoperative and postoperative outcomes of robotic liver surgery depending on established parameters of surgical complexity. The results indicate potential technical advantages of robotic technology in liver surgery based on parameters that can be studied before the operation. When evaluating robotic technology, future studies should focus not only at overall postoperative outcomes, but rather at potential technical intraoperative advantages to allow optimal case selection for robotic liver surgery. Clinical Trial Registration Number: DRKS00017229.