Adjustable Tibial Cut Guide for Knee Replacement Surgery
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Solution Overview
Problem
Current orthopedic procedures for knee arthroplasties face challenges in accurately positioning and adjusting tibial cut guides for bone resection, particularly in achieving precise posterior slope angles without the need for multiple cut guides or incremental adjustments.
Innovation Solution
An intramedullary cutting rig assembly that includes a posterior slope housing assembly and a carrier assembly, allowing for quick and accurate adjustment of the tibial cut guide's posterior slope angle and proximal-distal position, with 'quick-connect' or 'quick-release' mechanisms for efficient assembly and disassembly, enabling non-discrete adjustment of the posterior slope angle without swapping cut guides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple tibial cut guides with different posterior slope angles are used, then precise positioning for different slope angles is achieved, but device complexity and surgical time increase
Solution Approach 1:
The tibial cut guide is designed with an adjustable posterior slope mechanism that allows a single guide to perform multiple functions by changing its angle configuration, eliminating the need for multiple separate guides for different slope angles
Solution Approach 2:
The cut guide incorporates dynamic adjustment capabilities through movable components and locking mechanisms that enable the posterior slope angle to be changed during surgery, transforming a static tool into a dynamically adaptable one
2Adaptability or versatility
If incremental adjustment of posterior slope angle is used, then positioning flexibility is improved, but adjustment time and surgical procedure complexity increase
Solution Approach 1:
The adjustment mechanism is pre-configured with preset angle positions and quick-release features that allow surgeons to rapidly transition between different posterior slope angles without time-consuming incremental adjustments
3Measurement precision
If fixed proximal-distal positioning of tibial cut guide is used, then assembly simplicity is maintained, but positioning precision for bone resection decreases
Solution Approach 1:
The positioning system is divided into modular components including a carrier assembly with independent adjustment mechanisms for proximal-distal positioning, allowing precise control without overwhelming complexity
Data Source
AI summary
Systems and apparatuses including apparatuses that can be used in a knee replacement procedure are disclosed. According to one example, an assembly for a knee replacement surgery is disclosed. The assembly can comprise an adjustment member, a carrier assembly, a posterior slope housing assembly, and a boom. The carrier assembly can be configured to selectively couple with the adjustment member such that the carrier assembly is moveable relative to the adjustment member to a desired position. The posterior slope housing assembly can be connected to the adjustment member and can be configured to pivot the adjustment member relative to a portion of the posterior slope housing and a tibia. The boom can be coupled to the posterior slope housing assembly and can be configured to couple with a mounting component to mount the posterior slope housing assembly, the carrier assembly and the adjustment member relative to the tibia.