Offset Tool for Intramedullary Instrument Alignment in Revision Knee Surgery
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Solution Overview
Problem
During revision knee surgeries, existing orthopaedic surgical instruments lack efficient methods for accurately preparing the femur to receive a prosthetic implant, particularly in terms of aligning and securing the intramedullary orthopaedic surgical instruments with precise offset orientations, which can lead to suboptimal prosthetic fitting and stability.
Innovation Solution
The method involves using an offset tool with a stem trial and surgical block to align and secure an intramedullary orthopaedic surgical instrument within the femur's medullary canal, allowing for precise reaming and positioning of the prosthetic components by utilizing a cannulated reamer and an intramedullary adaptor system that locks into place, ensuring accurate offset orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional orthopaedic surgical instruments are used for revision knee surgery, then the surgical procedure can be performed, but the alignment and securing of intramedullary instruments lacks precision, leading to suboptimal prosthetic fitting
Solution Approach 1:
The patent introduces an offset tool as an intermediary device between the surgical block and the intramedullary instrument. This offset tool with its adjustable offset mechanism serves as a mediator that transfers and精确定位 the offset orientation from the surgical block to the intramedullary instrument, enabling precise alignment without direct coupling.
Solution Approach 2:
The patent employs a dynamic offset adjustment mechanism that allows the offset tool to be adjusted to different offset orientations during the surgical procedure. This dynamic adjustability enables the system to adapt to different surgical requirements while maintaining precision in the alignment of intramedullary instruments.
2Adaptability or versatility
If the offset tool is made rotatable to adjust offset orientation, then positioning flexibility is improved, but the complexity of the instrument increases
Solution Approach 1:
The patent combines the offset adjustment functionality with the existing surgical block and intramedullary instrument structure. The offset tool integrates with these components through standardized coupling mechanisms, allowing rotational adjustment without adding separate, independent adjustment systems, thus limiting the increase in overall complexity.
3Adaptability or versatility
If multiple separate instruments are used for alignment and reaming, then functional versatility is achieved, but the surgical workflow becomes more complex and time-consuming
Solution Approach 1:
The patent designs the offset tool to serve multiple functions: it provides offset orientation guidance, serves as a positioning guide for the intramedullary instrument, and interfaces with the surgical block. This multi-functionality reduces the need for multiple separate instruments and streamlines the surgical workflow while maintaining versatility.
Data Source
AI summary
A number of orthopaedic surgical instruments for use in a surgical procedure to prepare a patient's femur to receive an orthopedic prosthesis are disclosed. The tools include guide tools, cutting tools, surgical blocks, and other orthopaedic surgical instruments configured to plan and guide the preparation of the patient's femur. A method of using the orthopaedic surgical instruments is also disclosed.