Ultrasonic Blade Surface Pattern for Stable Cavitation Treatment
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Solution Overview
Problem
Existing ultrasonic treatment tools face challenges in efficiently generating cavitation for effective treatment of body tissue due to the difficulty in forming intersecting surfaces that satisfy specific conditions for stable cavitation layer formation and preventing tissue sticking and tool degradation.
Innovation Solution
The ultrasonic treatment tool incorporates a blade with a pattern of protrusions on its outer surface, each protrusion having a side surface intersecting the vibration direction, and these protrusions are formed by laser processing to ensure they meet specific dimensions and distribution for stable cavitation layer generation, while avoiding areas of high stress and contact with the pad.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If intersecting surfaces are formed on the treatment portion to generate cavitation, then cavitation generation is improved, but tissue sticking and tool degradation occur
Solution Approach 1:
The treatment portion is divided into multiple local regions, each with different surface characteristics. Some regions have intersecting surfaces that generate cavitation, while other regions have smooth surfaces that prevent tissue sticking. This local differentiation allows simultaneous achievement of cavitation generation and prevention of harmful effects.
Solution Approach 2:
The treatment portion surface is segmented into distinct functional zones: cavitation generation regions with intersecting surfaces and non-sticking regions with smooth surfaces. This segmentation allows each zone to perform its specific function without interfering with the other, resolving the contradiction between cavitation generation and tissue sticking prevention.
2Object-generated harmful factors
If intersecting surfaces are formed on the treatment portion, then cavitation layer formation is improved, but the treatment portion strength is reduced
Solution Approach 1:
Intersecting surfaces are formed only in specific local regions of the treatment portion rather than across the entire surface. This localized approach generates cavitation where needed while preserving the overall structural integrity and strength of the treatment portion.
Solution Approach 2:
The treatment portion is segmented such that only specific segments contain intersecting surfaces. The majority of the treatment portion maintains a solid, continuous structure for strength, while localized segments provide cavitation generation capability.
3Object-generated harmful factors
If a cavitation causing portion with intersecting surfaces is provided, then cavitation is generated, but the pad deteriorates due to contact
Solution Approach 1:
The treatment portion surface is segmented into cavitation generation regions and pad contact regions. The pad contact regions are designed with smooth surfaces that do not interfere with pad durability, while cavitation regions are positioned where they generate cavitation without contacting the pad.
Solution Approach 2:
Different surface qualities are assigned to different local regions: smooth surfaces in areas that contact the pad to prevent deterioration, and intersecting surfaces in areas that generate cavitation. This local differentiation prevents pad deterioration while maintaining cavitation generation capability.
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
This design enables stable cavitation layer formation, prevents tissue sticking, maintains tool strength, and avoids pad deterioration, thereby enhancing treatment performance and efficiency.
Implementation Method 1
a blade (120) including a treatment portion (121), the treatment portion being configured to treat a treatment target and the blade being configured to transmit an ultrasonic vibration to the treatment portion
Implementation Method 2
To treat the treatment target by use of both cavitation and frictional heat, a cavitation causing portion is provided in the treatment portion
Implementation Method 3
forming by laser processing a pattern on at least part of an outer surface of a treatment portion of a blade
Implementation Method 4
To treat the treatment target by use of both cavitation and frictional heat
Data Source
AI summary
An ultrasonic treatment tool comprises: a blade including a treatment portion, the treatment portion is configured to treat a treatment target and the blade is configured to transmit an ultrasonic vibration to the treatment portion, a pattern on at least part of an outer surface of the treatment portion, the pattern including a plurality of protrusions, each protrusion includes at least one side surface intersecting with a vibration direction of the ultrasonic vibration, the at least one side surface defining a cavitation surface, at least one cavitation surface is located within a pitch width in the vibration direction, an amplitude of the ultrasonic vibration defines the pitch width.