Adjustable Trochanteric Osteotomy Cut Guide
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Solution Overview
Problem
Surgeons face challenges in determining and executing precise extended trochanteric osteotomy cuts during femoral revision hip arthroplasty, including accurately locating and marking the cut lines and ensuring proper fixation of the new prosthesis stem.
Innovation Solution
An adjustable osteotomy cut guide device and templating software system that helps determine and visually depict the location and size of osteotomy cuts, calculate the size and area of fixation for a new prosthesis, and guide the surgeon through the cutting process, using radiographic images and anatomical landmarks to plan and execute the cuts accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional manual methods are used to determine and execute osteotomy cuts, then the surgeon has flexibility in execution, but the precision and accuracy of the cut location and markings are compromised
Solution Approach 1:
The templating software performs preliminary planning and determination of osteotomy cut location, length, and orientation before the actual surgery. Radiographic images are obtained and analyzed in advance to calculate the precise parameters of the osteotomy, allowing the surgeon to execute the pre-determined plan with greater accuracy.
Solution Approach 2:
The patent introduces an intermediary guidance system consisting of templates and marking devices that transfer the digitally calculated osteotomy parameters to the physical patient anatomy. The templates act as intermediaries between the software calculations and the surgical execution, ensuring precise translation of digital plans to physical cuts.
2Adaptability or versatility
If a fixed-size osteotomy guide is used, then the device is simpler to manufacture, but it cannot accommodate variations in patient anatomy and prosthesis sizes
Solution Approach 1:
The osteotomy guide is designed with adjustable and reconfigurable components that allow it to adapt to different patient anatomies and prosthesis sizes. The guide can be modified during surgery to accommodate varying cut lengths, orientations, and positions, transforming a static device into a dynamic, adaptable tool.
Solution Approach 2:
The guide device incorporates adjustable parameters such as cut length, orientation angles, and positioning that can be changed based on the specific patient anatomy and surgical requirements. This allows the same basic device to be configured for different surgical scenarios without requiring multiple specialized guides.
3Manufacturing precision
If the osteotomy cut is made without precise pre-planning, then the surgical procedure is faster, but the accuracy of cut location and the success of prosthesis fixation are reduced
Solution Approach 1:
Comprehensive pre-operative planning is performed using templating software that analyzes radiographic images to determine the optimal osteotomy parameters. This preliminary action includes calculating cut location, length, and orientation, as well as selecting appropriate prosthesis size, thereby reducing intraoperative decision-making time and improving cut accuracy.
Solution Approach 2:
The templating system provides visual feedback through graphical user interfaces that display the planned osteotomy parameters and allow the surgeon to review and adjust the plan before execution. This feedback mechanism ensures that the surgical plan is optimized and understood before the actual cutting begins.
Data Source
AI summary
Templating software can determine and visually depict the location and size of cuts in a trochanteric osteotomy, including an extended trochanteric osteotomy. The software can also calculate the size and area of fixation for a newly implanted prosthesis, based upon which the new prosthesis that will be implanted in a particular patient can be selected. Additionally, an adjustable cut guide can stabilize and guide the cuts during the procedure.