The da Vinci Xi System in Robotic Gastric Cancer Surgery: A Comparison with the S System

ABSTRACT

PURPOSE: The next-generation da Vinci system, the Xi, was introduced in 2015. Its benefits for patients with gastric cancer have not yet been clearly identified. METHODS: A total of 47 patients who had undergone robot-assisted gastrectomy (RAG) for gastric cancer were analyzed retrospectively. Twenty-six (26) patients had undergone RAG by da Vinci S, and the remaining 21 by da Vinci Xi. These two groups' clinicopathological characteristics, operative details, and short-term postoperative outcomes were compared. RESULTS: The median docking time was significantly shorter in the Xi group (5.0 vs. 3.0 min, respectively, p=0.020). Despite the significantly higher rate of the D2 lymph node dissection in the Xi group (76.2 vs. 34.6%, respectively, p=0.011), the median console time showed no significant difference (57.5 vs. 56.0 min, respectively, p=0.404). None of the other operative details or oncologic results showed any significant differences. CONCLUSION: Although the enhanced anatomical access system of the Xi system, clinical outcomes did not be improved, except reducing docking time. Further investigations which can improve clinical outcomes are needed.