Integrated Knee Surgery Device for Ligament Tensioning and Drilling
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Solution Overview
Problem
Current surgical techniques for implanting knee endoprostheses are complex, time-consuming, and prone to errors due to the need for multiple devices and steps, which increases the risk of complications and costs.
Innovation Solution
A surgical device with a guide component, tensioning component, and drilling component that allows for even ligament tensioning and precise calibration and drilling of the femur without requiring multiple devices or steps, using a single attachment that can be fixed to guide elements for accurate positioning and drilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate devices (clamping device, gauge block, drilling templates) are used for knee prosthesis surgery, then each device can perform its specific function, but the surgical procedure becomes complex, time-consuming, and prone to errors
Solution Approach 1:
The patent combines the clamping device, gauge block, and drilling templates into a single integrated surgical device. The device includes a base body with a first interface for clamping to the tibia and a second interface for clamping to the femur, with integrated gauging and drilling components that can be adjusted and locked in position. This merging eliminates the need to use multiple separate devices sequentially, reducing complexity while maintaining all necessary functions.
Solution Approach 2:
The surgical device is designed as a universal tool that can perform multiple functions: clamping the femur and tibia together, gauging the femoral endface to determine prosthesis size, and guiding drilling for prosthesis fixation. The device can be adapted to different knee sizes through adjustable components, making it applicable to a wide range of surgical cases with a single device rather than requiring multiple specialized tools.
2Adaptability or versatility
If multiple separate devices are used for surgery, then specific functions can be performed, but the operating time increases and costs rise
Solution Approach 1:
By integrating clamping, gauging, and drilling functions into one device, the surgical procedure can be performed in a continuous sequence without removing or replacing devices between steps. The integrated design allows the surgeon to clamp the bones, gauge the femur, and drill fixation holes using the same device, significantly reducing the time required compared to using multiple separate devices.
Solution Approach 2:
The device is designed to perform preliminary actions in a predetermined sequence: the clamping interfaces secure the bones first, then the gauging components automatically position themselves to measure the femoral endface, and finally the drilling guides are positioned based on the gauging results. This preliminary arrangement of functions in the correct sequence eliminates time-wasting adjustments and repositioning between steps.
3Adaptability or versatility
If multiple separate devices are used, then each device can be optimized for its function, but the risk of errors and complications increases
Solution Approach 1:
The integrated design ensures that the clamping, gauging, and drilling functions are mechanically linked, so that proper clamping automatically positions the gauging and drilling components correctly. This mechanical interconnection reduces the risk of human error in positioning and alignment that would occur when using multiple separate devices, while still providing all necessary functional capabilities.
Solution Approach 2:
The device incorporates feedback mechanisms where the gauging components provide information about the femoral endface geometry, which then automatically determines the correct positioning for the drilling guides. This feedback loop ensures that the drilling holes are positioned correctly based on the actual anatomical measurements, reducing errors that could occur with manual positioning using separate devices.
4Adaptability or versatility
If multiple separate devices are used, then specific surgical steps can be performed, but the procedure requires high experience and skill to operate correctly
Solution Approach 1:
The integrated device guides the surgeon through the surgical procedure in a predetermined sequence, with each component automatically positioning itself relative to the others. This reduces the need for the surgeon to have extensive experience in coordinating multiple separate devices, making the procedure more accessible to surgeons with varying levels of expertise while maintaining all necessary functional capabilities.
Solution Approach 2:
The device is designed to be self-aligning and self-positioning through its integrated mechanical links. When the clamping interfaces secure the femur and tibia, the gauging and drilling components automatically position themselves correctly relative to the bone surfaces, reducing the skill required to achieve proper alignment compared to using multiple separate devices that require manual positioning and coordination.
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The present invention relates to a surgical device (1) for surgery of a human knee. The surgical device (1) has a guide component (10) and a tensioning component (20). The guide component (10) has a base body (110) with a base surface (111), for placing on a tibial end face (5), and guide elements (120) that extend from the base surface (111). The tensioning component (20) is designed to tension the guide component (10) in such a way that the ligaments of the knee are uniformly tensioned in a state of flexion of the knee. A truing and drilling component (30) for truing and drilling a femoral end face (4) can be pushed onto the guide elements (120) and can be fixed in different positions with respect to the base surface (111). By means of the surgical device according to the invention, a risk of damage and of incorrect handling during the operation on a human knee is reduced and the duration of the operation is shortened.