Cerclage Cable System with Tensioning Crimp
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Solution Overview
Problem
Current cerclage techniques for stabilizing fractures, particularly in large bones, face challenges in maintaining effective immobilization and tension, often requiring multiple screws and plates, which can be cumbersome and may not adequately prevent movement of cerclage cables along the bone.
Innovation Solution
A cerclage cable system comprising a bone plate with apertures, securing devices such as cerclage cable anchors and buttons, and crimps, along with a tensioner tool that applies and maintains tension using a dual-action mechanism, ensuring stable fixation and minimizing cable motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple screws and plates are used to stabilize large bone fractures, then the immobilization effectiveness is improved, but the device complexity and surgical procedure difficulty increase
Solution Approach 1:
The patent combines multiple fixation functions into a single cerclage cable system that integrates cable, crimp, and bone plate components. The cable wraps around the bone to provide circumferential stabilization, while the crimp secures the cable ends, eliminating the need for multiple separate screws and plates.
Solution Approach 2:
The cerclage cable system serves multiple functions: the cable provides tension and stabilization, the crimp secures the cable ends, and the bone plate offers additional attachment points. This multi-functional system replaces multiple specialized components with a unified solution.
2Ease of operation
If traditional cerclage cable fixation is used without securing devices, then the procedure simplicity is maintained, but the cable movement along the bone cannot be prevented
Solution Approach 1:
The crimp acts as an intermediary component between the cerclage cable and the bone plate. It secures the cable ends to the bone plate, preventing cable movement while maintaining the relative simplicity of the overall procedure.
3Device complexity
If cerclage cable tension is not maintained, then the system complexity is reduced, but the fixation stability and fracture healing effectiveness deteriorate
Solution Approach 1:
The crimp is pre-formed with a specific geometry that allows it to be crimped onto the cable ends, creating a secure connection that maintains tension. The preliminary preparation of the crimp structure enables reliable tension maintenance without requiring complex active tensioning mechanisms.
Data Source
AI summary
A cerclage cable system is disclosed which includes a bone plate, one or more securing devices, and one or more cerclage cables. The bone plate includes a plurality of bone plate apertures thereupon, wherein the bone plate is configured to be affixed to a bone. The one or more securing devices include a body having a proximal end and a distal end, wherein at least one securing device aperture is disposed toward the proximal end, wherein the distal end of the securing device is configured to be inserted into and received by the plurality of bone plate apertures. The one or more cerclage cables include two terminal ends, wherein the one or more cerclage cables are wrapped around the bone, wherein one terminal end of the one or more cerclage cables is passed through at least one securing device aperture.