Ultrasonic Blade Support at Vibration Nodes for Compact Tissue Treatment
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Solution Overview
Problem
Existing ultrasonic treatment tools face challenges in effectively applying ultrasonic vibration to treatment targets due to the limitations of ultrasonic transducers and blades, particularly when reduced in size, leading to potential instability and reduced amplitude.
Innovation Solution
The ultrasonic treatment tool is designed with an ultrasonic transducer and blade configuration that supports the ultrasonic treatment unit at node positions of vibration, allowing for increased amplitude without the need for a cross-sectional area change, and is stabilized by a support structure at first and second node positions, ensuring stable operation and reduced size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the ultrasonic treatment unit is reduced in size, then the tool can be inserted into narrow body cavities and achieve compactness, but the amplitude of ultrasonic vibration decreases and stability is reduced
Solution Approach 1:
The support is configured to support the ultrasonic treatment unit at node positions of vibration when the ultrasonic transducer and blade vibrate at predetermined resonance frequencies. By positioning supports at nodal points where vibration amplitude is minimal, the blade maintains stability during ultrasonic vibration while preserving the compact size of the treatment unit.
Solution Approach 2:
The system operates at predetermined resonance frequencies of the ultrasonic blade, where the blade exhibits maximum vibration amplitude for a given input energy. By tuning the operating frequency to match the natural resonance frequency, the compact blade achieves sufficient vibration amplitude without increasing its physical size.
2Volume of moving object
If the ultrasonic treatment unit is reduced in size, then the tool achieves compactness, but the amplitude of ultrasonic vibration at the treatment end is insufficient
Solution Approach 1:
The support structure is designed to allow maximum vibration amplitude at the distal end of the blade by positioning supports at nodal points. This configuration enables the compact blade to achieve sufficient vibration amplitude at the treatment end by exploiting resonance phenomena and proper modal shaping.
Solution Approach 2:
The system operates at predetermined resonance frequencies where the blade exhibits maximum vibration efficiency. By tuning the operating frequency to match the natural resonance frequency of the blade, the compact treatment unit achieves the necessary vibration amplitude without increasing its physical dimensions.
3Stress or pressure
If additional components like horns are added to increase amplitude, then the ultrasonic vibration amplitude increases, but the device complexity and size increase
Solution Approach 1:
The support structure itself is configured to function as a resonant system that amplifies vibration at the blade distal end. By positioning supports at nodal points and utilizing resonance frequencies, the system achieves high vibration amplitude without requiring additional amplitude-multiplying components such as horns or levers.
Solution Approach 2:
The support structure serves multiple functions: it provides mechanical support for the ultrasonic treatment unit, positions the blade at appropriate depths, and simultaneously acts as a resonant system to amplify vibration amplitude. This multi-functionality eliminates the need for separate amplitude-multiplying components, reducing overall device complexity.
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 configuration enhances the amplitude of ultrasonic vibration at the treatment end, stabilizes the ultrasonic blade, and allows for a compact design without the need for additional components like horns, thereby improving treatment efficacy and tool compactness.
Implementation Method 1
an ultrasonic transducer configured to generate ultrasonic vibration
Implementation Method 2
an ultrasonic blade that is connected to a distal end portion of the ultrasonic transducer and that includes a treatment portion configured to apply the ultrasonic vibration generated by the ultrasonic transducer to a treatment target
Implementation Method 3
support the ultrasonic treatment unit at a first node position of vibration of the ultrasonic transducer and at a second node position of vibration of the ultrasonic blade in the support when each of the ultrasonic transducer and the ultrasonic blade vibrates at a predetermined resonance frequency
Data Source
AI summary
An ultrasonic treatment tool includes: a tubular portion; an ultrasonic treatment unit provided on a distal end side of the tubular portion, the ultrasonic treatment unit including an ultrasonic transducer configured to generate ultrasonic vibration, and an ultrasonic blade that is connected to a distal end portion of the ultrasonic transducer and that includes a treatment portion configured to apply the ultrasonic vibration to a biological tissue to treat the biological tissue; and a support configured to accommodate the ultrasonic treatment unit inside the support with the treatment portion protruding from an inside toward an outside of the support, and support the ultrasonic treatment unit at a first node position of vibration of the ultrasonic transducer and at a second node position of vibration of the ultrasonic blade in the support when each of the ultrasonic transducer and the ultrasonic blade vibrates at a predetermined resonance frequency.