An external mount for F-Tool for maintained reduction of shaft fractures

Introduction: Achieving accurate alignment in operative fracture treatment is crucial. Various techniques, including external maneuvers, traction devices, and intramedullary devices, aim to accomplish this while preserving fracture hematoma and promoting biological healing. However, these methods often require extended maintenance of reduction and raise concerns about radiation exposure. This study was inspired by the F-tool and aimed to develop an external mount system to maintain fracture reduction throughout the procedure, mitigating risks associated with existing techniques. Methods: and Materials The F-tool, a modular set of stainless-steel rods forming an F-shape for fracture reduction, served as the basis for our design. Using FreeCAD software, a CAD model was created for the external mount system. The system comprised a reduction-maintaining component and a static part, with 3D resin slicers used for model preparation and FEM modeling for mechanical stress analysis. Results: The developed external mount system consists of a dual-sided pole for reduction maintenance and various rods with clamps for attachment to the surgery table or floor. Mechanical stress simulations indicated promising stiffness. Different assembly configurations, including C-shaped or L-shaped static parts, were designed to prevent C-arm interference during procedures. Discussion: Existing techniques for fracture reduction pose challenges such as prolonged maintenance of reduction and radiation exposure. The novel F-tool mount system addresses these issues by offering maintained reduction, low radiation exposure, and minimal surgical morbidity at a low manufacturing cost. Comparative analysis with established techniques highlights the F-tool mount's advantages in providing consistent, controlled reduction without extensive manual manipulation or invasive procedures. The system aims to streamline the reduction process, potentially reducing operative duration and risks associated with longer procedures or nonunion rates reported with some techniques.