Trial Implant Assembly with Visualization Window
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Solution Overview
Problem
Conventional disc replacement procedures in intervertebral spaces require extensive use of fluoroscopy for proper implant positioning, leading to increased radiation exposure for both patients and operating room personnel.
Innovation Solution
A trial implant assembly with a visualization window and laterally opposed slots that allows for direct visualization of the implant position without the need for fluoroscopy, enabling precise positioning and reduced radiation exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fluoroscopy is used to visualize implant position, then implant positioning accuracy is improved, but radiation exposure to personnel and patient increases
Solution Approach 1:
The patent introduces an optical intermediary system consisting of a light source positioned within the intervertebral space and an optical element (mirror or prism) on the trial implant that reflects light to create a visible indication of implant position. This optical mediator replaces the need for fluoroscopy, allowing visualization without radiation exposure to personnel and patient while maintaining positioning accuracy
2Measurement precision
If trial implant is inserted to determine correct size, then implant selection accuracy is improved, but procedure complexity increases
Solution Approach 1:
The trial implant is designed with self-visualizing features including an optical element (mirror or prism) that automatically reflects light from the light source to create a visible indication of its position and orientation. This self-service capability eliminates the need for complex fluoroscopy equipment and procedures, allowing surgeons to easily determine the correct implant size through direct visual observation while maintaining high accuracy
Data Source
AI summary
A trial implant assembly is provided that includes a threaded shaft having exterior threading adjacent a distal end and a trial implant that includes a trial base having an interiorly threaded through hole couplable to the distal end of the shaft and a trial head having a superior endplate and an inferior endplate and a support connecting the superior endplate to the inferior endplate. A variety of visualization windows are provided through the trial implant as well as a variety of mechanically adjustable stops to prevent over insertion of the trial head within the intervertebral disc space.