hinotori TM vs da Vinci®: propensity score-matched analysis of surgical outcomes of robot-assisted radical prostatectomy

Abstract

Abstract hinotori™ is a recently-developed surgical robot system. The present study aims to compare surgical outcomes of robot-assisted radical prostatectomy (RARP) by the hinotori™ system compared with those of the longer-established da Vinci® system. This study includes 100 consecutive patients who underwent RARP by da Vinci® and 60 patients who underwent RARP by hinotori™. To minimize imbalances of patient demographics between the two groups, a 1:1 propensity score-matching was performed, and 43 patients each were assigned to both the da Vinci® and hinotori™ groups after matching. In the propensity score-matched cohort, there were no significant differences in patient demographics between the two groups. Regarding surgical outcomes, operative time and console time in the hinotori™ group were significantly longer than those in da Vinci® group. Meanwhile, there were no significant differences in other surgical outcomes between the two groups, such as estimated blood loss, intraoperative complications, major postoperative complications (Clavien-Dindo grade 3 or 4) or length of hospital stay after surgery. Pathological features including positive cancer margin were also similar between the groups. Moreover, there were no significant differences of urinary continence rates 3, 6 and 12 months after surgery between the da Vinci® and hinotori™ groups. Our results suggest that the hinotori™ surgical robot system could provide comparable surgical outcomes to that of the da Vinci® system for patients undergoing RARP.