Sizing Instrument with Visualization Window for Radial Head Arthroplasty
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Solution Overview
Problem
Current radial head arthroplasty systems face challenges in accurately sizing orthopedic implants due to the use of solid trial pieces, which obstruct visibility and can lead to elbow instability post-surgery.
Innovation Solution
The development of orthopedic implant sizing instruments with visualization windows or slots that provide direct visibility during arthroplasty procedures, allowing surgeons to correctly assess resection levels and select appropriately sized implants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If solid trial pieces are used for implant sizing, then the structural integrity and ease of handling are improved, but the visibility of resection levels and underlying bone structures deteriorates
Solution Approach 1:
The trial piece is divided into multiple segments or components, with at least one segment being translucent or transparent. This allows the trial piece to maintain its structural integrity while enabling visualization of the underlying bone and resection levels through the translucent portion.
Solution Approach 2:
The trial piece incorporates translucent or transparent materials that allow light transmission, creating visual contrast between the trial piece and underlying structures. This enables the surgeon to see through the trial piece to assess resection levels and bone anatomy.
2Ease of operation
If solid trial pieces are used for implant sizing, then the ease of operation is improved, but the accuracy of implant size selection deteriorates
Solution Approach 1:
The trial piece is segmented into translucent and opaque portions, allowing the surgeon to see through the translucent portion for accurate visualization of bone structures while maintaining the overall structural integrity and ease of handling of the trial piece.
Solution Approach 2:
The translucent trial piece acts as an intermediary that allows optical transmission between the surgeon's view and the underlying bone structures. This mediator enables accurate measurement and sizing without compromising the trial piece's functionality.
3Device complexity
If solid trial pieces are used for implant sizing, then the device complexity is reduced, but the reliability of achieving proper resection levels deteriorates
Solution Approach 1:
The trial piece incorporates translucent segments that enable visualization of resection levels without adding complex mechanical or electronic components. This maintains device simplicity while significantly improving the reliability of achieving proper resection levels through direct visual feedback.
Data Source
AI summary
Orthopedic implant sizing instruments, systems, and methods for use during arthroplasty procedures, for example, radial head arthroplasty procedures, are provided. The sizing instruments include at least one sizer head having at least one visualization window or slot provided therethrough for allowing a user to visualize associated surgical structures or surfaces to ensure proper joint reduction. The orthopedic implant sizing instruments, systems, and/or related methods can utilize sizer heads and/or windows having a plurality of different sizes and/or shapes.