Surgical Tool S-Shaped Shaft for Sciatic Nerve Implantation
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Solution Overview
Problem
Existing surgical tools for implanting electrode wires, particularly those designed for laparoscopic procedures, are cumbersome and unsuitable for precise implantation on specific nerves like the sciatic nerve due to their geometry, requiring high surgical skill and being difficult to handle effectively.
Innovation Solution
A surgical tool with an S-shaped segment in its shaft section, featuring an outer arc section with a smaller bend radius to enclose the nerve from the back, allowing precise placement of the electrode wire's contact surface, and an extension segment for leverage, combined with a handle system for easy manipulation and wire insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a generic application tool with a simple shaft section is used, then the device complexity is reduced, but the ease of operation deteriorates because the tool cannot access the backside of the sciatic nerve
Solution Approach 1:
The shaft section is designed with an S-shaped curved geometry comprising two arc sections with different radii. The first arc section has a larger radius for navigating to the nerve, while the second arc section has a smaller radius for encircling the nerve backside. This curvature enables the contact surface to reach positions on the nerve that are inaccessible to straight or simply curved tools.
2Ease of operation
If the outer arc section has a larger bend radius to facilitate guiding, then the ease of operation for navigation is improved, but the manufacturing precision for precise nerve enclosure deteriorates
Solution Approach 1:
Different sections of the shaft have different geometric properties tailored to their specific functions. The first arc section has a larger bend radius optimized for navigating through tissue, while the second arc section has a smaller bend radius optimized for precisely encircling the nerve. This local differentiation of geometric quality allows each section to excel at its specific task.
3Adaptability or versatility
If the application tool is designed for general pelvic nerve implantation, then the adaptability is improved, but the ease of operation for sciatic nerve specifically deteriorates due to the nerve's deep and lateral position
Solution Approach 1:
The S-shaped curved shaft section with its two distinct arc sections provides the specific geometry needed to reach the sciatic nerve's deep and lateral position while maintaining the ability to accommodate other pelvic nerves. The curve allows the tool to navigate around anatomical structures to access the nerve backside.
Data Source
AI summary
The invention relates to a surgical application tool (18) for implanting an electrode wire on nerves in an inner area of a pelvis of a human body, the surgical application tool (18) including a mandrel (16) having an engagement tip (19) and a shaft section (02) and including a sleeve (01) which is configured to insert and guide the electrode wire through a sleeve interior (08) when the mandrel (16) is removed, the sleeve (01) extending at least along the shaft section (02) and being detachable from the mandrel (16), a handle (20) being provided on the mandrel (16) and/or the sleeve (01) for the extracorporeal handling of the application tool (18), and the handle (20) being configured to manually rotate and/or pivot the mandrel (16) and/or the sleeve (01) when it is inserted into the body. The shaft section (02) of the mandrel (16) and/or the sleeve (01) have/has at least one S-shaped segment (03) having two consecutive arc sections (05, 06), the outer arc section (06) of the S-shaped segment (03) at least partially enclosing the nerve.