Curved Waveguide Output for Ultrasonic Surgical Tool
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Solution Overview
Problem
Existing ultrasonic surgical tools with waveguide outputs are not well-suited for welding and ablation procedures, and their design can make them difficult to use for these applications.
Innovation Solution
A waveguide output with a cylindrical first section and a curved, reduced-diameter extension member, featuring radially extending blades that provide high angular vibrational displacements, allowing for focused energy delivery and improved ergonomics, enabling effective cutting, welding, and ablation by generating high-amplitude torsional vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional waveguide output is used for cutting, then cutting function is provided, but welding and ablation procedures cannot be effectively performed
Solution Approach 1:
The output means is designed with multiple blade means extending radially from the waveguide extension member, enabling the same device to perform cutting, welding, and ablation procedures. The curved waveguide extension member with multiple radially extending blades provides a universal interface that can adapt to different surgical needs without requiring separate specialized tools for each function.
2Stability of the object's composition
If the waveguide output is designed with a large diameter for stability, then structural stability is improved, but the tool becomes difficult to manipulate for curved structures
Solution Approach 1:
The waveguide extension member is curved in one plane, creating a conformable output that can adapt to curved anatomical structures. This curvature allows the distal end to follow the contour of tissues such as the femoral head and joint capsule, improving ease of manipulation while maintaining the structural stability provided by the curved geometry itself.
3Power
If the blade means are positioned far from the waveguide axis for high vibration amplitude, then cutting effectiveness is improved, but the output extends beyond the waveguide radius reducing precision control
Solution Approach 1:
The blade means are positioned radially outward from the waveguide axis, utilizing the radial dimension to achieve high vibration amplitudes. The curved waveguide extension member allows the blades to extend in a plane substantially orthogonal to the curvature plane, creating a three-dimensional arrangement that provides both high amplitude vibrations and precise control over the cutting zone location.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the tool's ability to perform cutting, welding, and ablation by providing a highly directional cavitation field with localized heating, facilitating haemostasis and allowing for use in curved structures with reduced manipulation requirements.
Implementation Method 1
a waveguide output for torsionally vibratable ultrasonic surgical tools
Implementation Method 2
means to generate ultrasonic torsional mode vibrations
Implementation Method 3
generating a highly directional cavitation field with localized heating
Implementation Method 4
imparting energy directly into tissue brought to bear on such a face
Data Source
AI summary
The shaped output is for use with an ultrasonic surgical tool vibratable in torsional mode. The output has a generally cylindrical first waveguide (1) with, at a distal end a second waveguide extension member (3) of reduced diameter. The second waveguide (3) is curved in one plane from the axis of the first waveguide. It has at least two blade faces (4) extending radially outwardly from its distal end.