Ultrasonic Energy Control Device for Tissue Division Detection
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Solution Overview
Problem
Ultrasonic treatment instruments face challenges in safely stopping ultrasonic vibration after tissue division to prevent damage to grasping pieces, as existing methods rely on temperature detection through resonance frequency, which may not accurately determine treatment completion.
Innovation Solution
An energy control device that acquires the resonance frequency of the ultrasonic vibration system, calculates an initial feature value, sets a threshold based on this value, and controls the power output to the ultrasonic transducer, either stopping or reducing the vibration when the resonance frequency falls below the threshold, thereby preventing continued vibration and potential damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature detection through resonance frequency is used to control ultrasonic vibration, then treatment completion can be monitored, but accurate determination of tissue division completion is difficult
Solution Approach 1:
The patent changes the detection parameter from temperature (resonance frequency) to mechanical impedance characteristics. By detecting changes in the mechanical impedance of the vibration system when tissue is divided, the system can reliably determine treatment completion without relying on temperature changes alone, thus resolving the contradiction between measurement precision and reliability.
Solution Approach 2:
The patent replaces the thermal detection method (measuring resonance frequency changes due to temperature) with a mechanical detection method (measuring impedance characteristics of the vibration system). This substitution allows direct detection of tissue division completion through mechanical property changes, improving both accuracy and reliability.
2Manufacturing precision
If ultrasonic vibration continues after tissue division, then treatment completeness can be ensured, but damage to grasping pieces occurs
Solution Approach 1:
The patent implements a feedback control system that continuously monitors the mechanical impedance characteristics of the vibration system during ultrasonic treatment. When the impedance change indicates tissue division completion, the system automatically stops or reduces ultrasonic vibration, preventing damage to the grasping pieces while ensuring treatment completeness.
Solution Approach 2:
The patent establishes predetermined impedance change thresholds that indicate tissue division completion before actual damage to grasping pieces occurs. By detecting these preliminary changes and stopping vibration in advance, the system prevents both incomplete treatment and equipment damage.
3Device complexity
If resonance frequency threshold is set based on fixed values, then control is simple, but adaptability to different treatment conditions is poor
Solution Approach 1:
The patent makes the threshold determination dynamic by calculating it based on the initial mechanical impedance characteristics measured at the start of each treatment. This allows the threshold to adapt to different treatment conditions (different tissues, different initial states) while maintaining simple control logic, resolving the contradiction between simplicity and adaptability.
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
Effectively stops or reduces ultrasonic vibration when tissue division is detected, preventing damage to the grasping pieces and ensuring safe operation by accurately determining the completion of the treatment based on resonance frequency changes.
Implementation Method 1
an end effector performing treatment using ultrasonic vibration generated by an ultrasonic transducer
Implementation Method 2
A resonance frequency of a vibration system including a grasping piece that ultrasonically vibrates decreases as temperature rises
Data Source
AI summary
An energy control device supplies power to an ultrasonic treatment instrument including an end effector performing treatment using ultrasonic vibration generated by an ultrasonic transducer. The energy control device includes an energy source configured to output the power to the ultrasonic transducer, and an integrated circuit. The integrated circuit is configured to: acquire a resonance frequency of a vibration system including the ultrasonic transducer; calculate an initial feature value relating to the resonance frequency after a start of an output of the power; set a threshold based on the initial feature value; and perform causing the energy source to stop or reduce the output of the power to the ultrasonic transducer based on a relationship between the resonance frequency and the threshold, or notifying the relationship between the resonance frequency and the threshold.