High-Frequency Power Control Device for Tissue Treatment
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Solution Overview
Problem
Existing high-frequency treatment systems for living tissues face challenges in accurately detecting the completion of procedures like incision, which can lead to excessive heat damage and instrument wear due to inadequate control over high-frequency power output.
Innovation Solution
A control device that calculates and compares variations in phase difference and impedance of high-frequency power supplied to a treatment instrument, performing reduction processing when thresholds are met to ensure precise control and completion detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high frequency power output is continuously supplied to ensure treatment effectiveness, then treatment efficacy is improved, but excessive heat damage and instrument wear occur due to inadequate power control
Solution Approach 1:
The control device uses detecting circuits to sequentially detect phase difference and impedance of the high frequency power supplied to the treatment instrument. The processor calculates variations of these parameters and compares them with thresholds to determine treatment completion, then performs reduction processing to reduce power output. This feedback mechanism ensures treatment effectiveness while preventing excessive heat damage by dynamically adjusting power based on real-time tissue response.
Solution Approach 2:
The system dynamically adjusts high frequency power output during treatment by continuously monitoring phase difference and impedance variations. The processor calculates parameter variations sequentially and modifies power levels based on whether calculated values exceed thresholds, enabling adaptive power control that matches tissue treatment progress and prevents overheating.
2Productivity
If high frequency power output is increased to ensure treatment completion, then treatment speed is improved, but instrument wear increases due to excessive power output
Solution Approach 1:
The detecting circuit and processor monitor phase difference and impedance variations to determine treatment completion status. When the calculated variation exceeds the threshold, the system reduces power output, preventing unnecessary continued high-power operation that would cause instrument wear. This feedback-based termination control extends instrument lifespan while maintaining treatment efficiency.
Solution Approach 2:
The system uses the tissue's own electrical properties (phase difference and impedance) as natural indicators of treatment completion. The processor calculates variations of these self-generated signals and autonomously determines when to reduce power, eliminating the need for external monitoring and enabling self-regulating treatment that prevents overuse of the instrument.
3Object-affected harmful factors
If power output is reduced early to prevent heat damage, then safety is improved, but treatment completion detection accuracy decreases
Solution Approach 1:
The system performs preliminary detection of phase difference and impedance parameters throughout the treatment process, calculating their variations sequentially. By monitoring these parameters before reaching the power reduction threshold, the system accurately identifies the precise moment of treatment completion, ensuring both safety and detection accuracy.
Solution Approach 2:
The system monitors changes in electrical parameters (phase difference and impedance) that naturally occur during tissue treatment. By calculating variations of these parameters and comparing with thresholds, the system accurately detects treatment completion based on tissue property changes rather than arbitrary time or power limits, maintaining both safety and precision.
4Device complexity
If simple power control is used to reduce device complexity, then device simplicity is improved, but control precision over high frequency power output deteriorates
Solution Approach 1:
The control device incorporates detecting circuits that measure phase difference and impedance, with a processor that calculates their variations and compares against thresholds. This feedback loop provides precise power output control by automatically adjusting power levels based on real-time tissue response, achieving high control precision without requiring overly complex external monitoring systems.
Solution Approach 2:
The control device integrates multiple functions into a single system: the detecting circuit simultaneously monitors both phase difference and impedance, the processor performs calculations for both parameters and determines treatment completion based on their variations. This multi-functional integration achieves precise control while avoiding the need for separate complex control systems for each parameter.
Data Source
AI summary
A control device includes: a power source configured to supply a high frequency power to a treatment instrument configured to treat a living tissue; a detecting circuit configured to sequentially detect a phase difference between a voltage and a current of the high frequency power supplied to the treatment instrument; and a processor configured to control operation of the power source, the processor being configured to sequentially calculate a variation of the phase difference detected by the detecting circuit, compare the calculated variation of the phase difference with a first threshold set for a variation of a phase difference, and perform reduction processing to reduce output of the high frequency power to be supplied to the treatment instrument when it is determined that the calculated variation of the phase difference is equal to or smaller than the first threshold.