Modular Shoulder Jig for Glenoid Component Placement
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Solution Overview
Problem
Conventional shoulder replacement surgery techniques lack precision and accuracy in guiding the placement of the glenoid component, often relying on two-dimensional imaging methods like X-rays or 2D CT scans, which fail to provide accurate three-dimensional measurements, leading to increased surgical time, blood loss, and the risk of infection, and require patient-specific, non-reusable instruments that are costly and time-consuming.
Innovation Solution
A pre-assembled modular jig that uses measurements from 3D imaging like CT scans or MRI scans to guide the placement of the glenoid component in shoulder replacement surgery, ensuring precise alignment and sizing in three dimensions, reducing the need for arbitrary calculations and minimizing bone and blood loss, while being reusable and user-friendly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional two-dimensional imaging methods (X-rays or 2D CT scans) are used for guiding glenoid component placement, then the surgical procedure can be performed with standard equipment, but the precision and accuracy of placement is insufficient
Solution Approach 1:
The patent transitions from two-dimensional imaging methods to three-dimensional imaging (CT or MRI scans) to achieve accurate measurement of glenoid version, inclination, and other anatomical parameters. This dimensional upgrade enables precise preoperative planning and accurate intraoperative guidance for glenoid component placement.
2Adaptability or versatility
If patient-specific non-reusable instruments are used for each surgery, then the placement can be customized for each patient, but the cost and preparation time increase significantly
Solution Approach 1:
The patent implements preoperative planning using 3D imaging to create a customized surgical plan before the actual surgery. This preliminary action includes measuring glenoid version, inclination, and other parameters, and preparing the appropriate cutting guide and positioning jig configurations in advance, thereby reducing intraoperative time and preparation burden.
Solution Approach 2:
The cutting guide and positioning jig are designed as universal instruments that can be used across multiple patients and surgical cases. Through modular design and adjustable components, these instruments accommodate different anatomical variations without requiring completely custom-made tools for each patient, thus reducing cost and preparation time while maintaining patient-specific accuracy.
3Ease of operation
If arbitrary calculations are performed for glenoid placement angles, then the surgical procedure is simplified, but the accuracy and precision of placement deteriorates
Solution Approach 1:
The patent introduces a cutting guide as an intermediary tool that physically translates the preoperatively determined accurate measurements into intraoperative guidance. The cutting guide incorporates the precise glenoid version, inclination, and other parameters measured from 3D imaging, providing a mechanical mediator between the digital plan and the actual surgical execution, thereby maintaining both simplicity and precision.
4Productivity
If conventional guiding instruments are used without three-dimensional measurements, then the surgical equipment remains simple, but the surgical time and risk of infection increase
Solution Approach 1:
The patent performs all critical measurements and planning actions preoperatively using 3D imaging, determining glenoid version, inclination, and component positioning before the patient enters the operating room. This preliminary preparation reduces the duration of the actual surgical procedure by eliminating time-consuming intraoperative measurements and calculations, thereby reducing surgical time and associated infection risks.
Data Source
AI summary
The present invention provides a jig for shoulder replacement surgery. In particular the present invention provides a pre-assembled jig that facilitates and guides the placement of glenoid component of the implant in shoulder replacement surgery. The present jig (P) is pre-assembled to ensure precision alignment, placing and sizing of the glenoid component of the implant for shoulder replacement surgery based on the difference of cuts in millimeters instead of the usual version measurements in degrees. The present invention (P) guides the glenoid component of shoulder replacement in the precise position and thereby provides accuracy in placement of the component.