Max Robotics — Global Service Robot Directory + US Certification

About

Shinobu Ohnuma is a leading colorectal surgeon whose research focuses on improving outcomes in minimally invasive surgery for rectal cancer and congenital biliary conditions. His work has been instrumental in understanding and mitigating the functional consequences of surgical treatment, particularly male sexual dysfunction after rectal cancer surgery. As the lead investigator of the landmark LANDMARC study (2024, 8 citations), Ohnuma conducted the first prospective multicenter survey to systematically quantify the incidence of erectile and ejaculatory dysfunction following laparoscopic, robotic, and transanal approaches—a critical contribution to patient-centered surgical decision-making. He also pioneered early robotic techniques for type I congenital dilatation of the bile duct (2015, 11 citations), demonstrating the feasibility of advanced minimally invasive approaches in complex hepatobiliary surgery. More recently, Ohnuma has addressed the debated role of prophylactic ureteral catheterization in colorectal cancer surgery (2025, 2 citations), providing evidence to guide intraoperative safety practices. Through these contributions, Ohnuma has shaped modern surgical standards, balancing oncologic efficacy with quality-of-life preservation.