Bone Fixation Frame with Adjustable Flexible Member Construct
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Solution Overview
Problem
There is a need for apparatus and methods to apply compressive force to bones effectively for healing, especially in cases of fractures, while accommodating various bone sizes, shapes, and locations, and being easy to use intraoperatively.
Innovation Solution
The use of a frame with flexible member holders and an adjustable flexible member construct that forms a loop, allowing for secure compression of bone fragments without the need for knots, using biocompatible materials like non-resorbable polymers or metals, and adjustable fasteners for precise tensioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If compressive force is applied to bone fragments using traditional fixation devices, then bone healing is promoted, but the device complexity and difficulty of intraoperative adjustment increase
Solution Approach 1:
The patent employs a dynamic adjustment mechanism where the compression force can be modified intraoperatively by adjusting the position of the distal fragment relative to the proximal fragment. The fixation device includes adjustable components that allow surgeons to optimize compression force after implantation, transforming a static device into a dynamic system that adapts to surgical needs.
Solution Approach 2:
The fixation device is divided into separate modular components including a proximal fragment fixation element, a distal fragment fixation element, and an adjustment mechanism. This segmentation allows independent positioning and adjustment of each component, simplifying the overall device structure while enabling complex functionality through component coordination.
2Reliability
If traditional fixation devices are used to secure bone fragments, then fracture stabilization is achieved, but adaptability to various bone sizes, shapes, and fracture locations is limited
Solution Approach 1:
The fixation device incorporates universal features including adjustable-length compression members, variable-angle fixation elements, and modular components that can be configured for different bone types and fracture patterns. The distal fragment fixation element can be positioned at multiple locations along the bone, allowing the same device design to accommodate various bone sizes, shapes, and fracture locations.
Solution Approach 2:
The device includes dynamic adjustment capabilities that allow intraoperative modification of compression force and component positioning. This enables adaptation to unexpected anatomical variations or fracture patterns encountered during surgery, enhancing versatility without requiring multiple specialized device variants.
3Reliability
If complex knot-tying techniques are used to secure flexible members, then secure fixation is achieved, but intraoperative ease of use and surgical time are reduced
Solution Approach 1:
The patent replaces traditional knot-tying mechanical systems with alternative fixation mechanisms such as friction-based locking, cam-locked interfaces, or snap-fit connections. These mechanisms achieve secure fixation through mechanical interlocking or friction engagement without requiring surgical knots, significantly simplifying the installation process and reducing surgical time while maintaining fixation reliability.
Solution Approach 2:
The fixation device incorporates self-locking or self-adjusting features where the compression members automatically secure themselves through friction engagement or mechanical interlocking upon insertion. This self-service mechanism eliminates the need for manual knot-tying or complex assembly steps, allowing surgeons to quickly secure bone fragments with simple insertion motions.
Data Source
AI summary
Assemblies for securing a fractured or weakened bone within a subject's body are provided. The assembly includes a frame having an adjustable flexible member construct thereon. The adjustable flexible member construct is disposed in the frame such that the adjustable flexible member and the frame encircle the fractured or weakened bone.