Design and in Vitro Reduction Experiments of a Novel Closed Reduction Robot for Pelvic Fracture

Pelvic fractures are among the most intricate musculoskeletal injuries in the domain of traumatic orthopedics, necessitating efficacious treatment strategies. Closed reduction robots, as pivotal instruments for the treatment of pelvic fractures, exert a direct influence on treatment outcomes. However, due to insufficient consideration of clinical requirements, existing closed reduction robots have significant limitations in clinical applications. To solve the aforementioned issue, this paper summarises the degree of freedom requirements and layout constraints of a closed reduction robot and determines the optimal layout position of a closed reduction robot. On this basis, a new closed reduction robot for pelvic fracture with remote center of motion features is proposed, with clinical requirements as the primary consideration. Finally, a comprehensive reduction robot system was constructed, and the reduction of a Tile-Cl type fracture was simulated in vitro. The experimental results demonstrate that the designed closed reduction robot possesses high-precision assistive features, and the system exhibits intelligent characteristics that contribute to the surgical process, thereby enhancing the precision of the operation for the physician.