High-Frequency Power Supply Impedance Control
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Solution Overview
Problem
Existing high-frequency treatment systems face challenges in precisely adjusting output voltage and current to optimize treatment efficiency and precision, as these parameters vary with the treatment target and are not adequately controlled based on real-time impedance changes.
Innovation Solution
An electric power source device with a control circuit that monitors impedance values and adjusts output by setting a stop impedance value based on initial and change-over impedance values, using a three-stage control method to optimize power delivery during high-frequency treatments, ensuring consistent and efficient tissue sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the output voltage and current are adjusted based on fixed impedance values, then the treatment process is simple to control, but the treatment precision and efficiency deteriorate because the optimal parameters vary with treatment target
Solution Approach 1:
The patent implements dynamic impedance monitoring during the high-frequency treatment process. The control circuit continuously acquires impedance values and compares them against predetermined thresholds to dynamically adjust the output voltage and current, ensuring optimal treatment parameters adapt to real-time tissue state changes rather than relying on fixed pre-set values
Solution Approach 2:
The patent incorporates a feedback mechanism where the control circuit monitors the impedance value during treatment and uses this information to regulate the output power. When the impedance reaches a predetermined threshold indicating sufficient tissue sealing, the system automatically adjusts or terminates the output, creating a closed-loop control system that improves precision while maintaining manageable complexity
2Reliability
If the treatment duration is extended to ensure complete sealing, then the sealing reliability improves, but the treatment time increases and productivity decreases
Solution Approach 1:
The control circuit continuously monitors impedance during the sealing process and uses this real-time feedback to determine when the tissue has reached the desired sealed state. This allows the treatment to be terminated as soon as the sealing threshold is achieved, preventing unnecessary extension of treatment time while ensuring reliable sealing through objective electrical criteria
Solution Approach 2:
The patent replaces subjective visual assessment or fixed-time protocols with objective electrical impedance measurement to determine treatment completion. This substitution enables precise detection of the sealing endpoint, allowing the system to stop treatment exactly when needed, thereby maintaining high reliability while maximizing productivity
3Productivity
If the output power is increased to speed up the sealing process, then the treatment efficiency improves, but the risk of tissue damage increases and treatment reliability deteriorates
Solution Approach 1:
The system dynamically adjusts the output power based on real-time impedance measurements rather than maintaining a fixed high power level. The control circuit can increase power when impedance indicates the tissue can withstand higher energy, and reduce or terminate power when impedance thresholds indicate sufficient sealing or potential damage risk, thereby optimizing efficiency while minimizing harm
Solution Approach 2:
The continuous impedance monitoring provides feedback that regulates power delivery. The system responds to impedance changes by adjusting output levels, ensuring that high power is only applied when the tissue state permits, thus achieving high treatment efficiency without compromising tissue safety or sealing reliability
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 system achieves optimized output control, ensuring precise and efficient tissue sealing by dynamically adjusting voltage and current based on real-time impedance changes, thereby improving treatment precision and consistency across different tissue types.
Implementation Method 1
the biological tissue grasped by the grasping members is heated by a high-frequency current flowing through the biological tissue
Data Source
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AI summary
An operation method of an electric power source device (200) for operating a high-frequency treatment instrument (100) configured to perform a high-frequency treatment on a biological tissue includes causing a high-frequency electric power source circuit to output electric power (S201); specifying an initial state of the biological tissue (S202); acquiring a value relating to an impedance of the biological tissue (S303); determining an additional impedance value based on the initial state (S401); setting a stop impedance value which is the sum of the additional impedance value and a change-over impedance value (S402); and causing the high-frequency electric power source circuit to stop the output, if the value relating to the impedance reaches the stop impedance value after the value relating to the impedance reached the change-over impedance value (S412).