Energy Source Apparatus Impedance Feedback Control
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Solution Overview
Problem
Existing energy source apparatuses for treatment tools with bipolar electrodes and heaters lack effective control over heater output based on the state of the treatment target, which affects the ability to seal and coagulate the target efficiently.
Innovation Solution
An energy source apparatus with a processor that detects the initial impedance of the treatment target, determines when it reaches a minimum value, and adjusts the output to the bipolar electrodes and heater accordingly, using acquired parameters to control the heater output and extend the time for sealing and coagulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the heater output is increased to seal and coagulate the treatment target faster, then the treatment time is reduced, but the ability to seal and coagulate the target is compromised because the water boils too quickly
Solution Approach 1:
The system continuously monitors the impedance of the treatment target and uses this feedback to dynamically adjust the heater output. When impedance reaches a minimum value indicating water boiling, the system automatically reduces heater power to maintain optimal sealing conditions, ensuring reliable coagulation while preventing excessive water loss.
Solution Approach 2:
The heater output is made dynamic rather than static, automatically adjusting based on the real-time state of the treatment target. The system transitions from a fixed power mode to a variable power mode that adapts to changing tissue conditions, optimizing both treatment speed and sealing reliability throughout the procedure.
2Reliability
If the heater output is decreased to maintain proper sealing and coagulation, then the sealing ability is improved, but the treatment time increases
Solution Approach 1:
The impedance monitoring system provides real-time feedback that enables the heater output to be optimized throughout the treatment process. By detecting impedance changes, the system knows when to adjust power levels, maintaining reliable sealing while minimizing unnecessary treatment time through automated control.
Solution Approach 2:
The system changes the operating parameters of the heater based on detected tissue state. By monitoring impedance and adjusting power output accordingly, the system optimizes the thermal parameters to achieve reliable sealing in the minimum necessary time, adapting to tissue conditions rather than using fixed parameters.
3Reliability
If the heater output is continuously adjusted based on target state, then the sealing and coagulation ability is optimized, but the device complexity increases
Solution Approach 1:
The system uses impedance monitoring as a simple yet effective feedback mechanism to control heater output. This feedback approach provides optimized sealing and coagulation without requiring complex control algorithms, as the impedance changes naturally indicate tissue state and appropriate power levels.
Solution Approach 2:
The treatment target itself provides the control signal through its impedance characteristics. The tissue's electrical properties automatically indicate its state (hydrated vs. dehydrated), allowing the system to self-regulate heater output without complex external sensing or control mechanisms, simplifying the overall device architecture.
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 approach enhances the ability to seal and coagulate the treatment target by optimizing the heater output based on the target's state, increasing the time for effective treatment and improving energy efficiency.
Implementation Method 1
outputs high-frequency electric power to the bipolar electrodes so as to cause a high-frequency current to flow through a treatment target between the bipolar electrodes
Implementation Method 2
outputs heater electric power to the heater so as to cause the heater to generate heat
Data Source
AI summary
A treatment system includes a treatment tool and an energy source apparatus used to supply electrical energy to the treatment tool. The treatment tool includes a heater and bipolar electrodes to grip a treatment target. The energy source apparatus includes a processor to control the output to the bipolar electrodes and the heater, respectively. The processor directs the output to the bipolar electrodes and detects an initial value of the impedance of the treatment target. The processor determines whether or not the impedance has reached a minimum value and then retrieves a parameter that is detected before the minimum value of the impedance is detected. The processor performs a first process and/or a second process based on the acquired parameter after the minimum value is detected. The first process determines whether or not the output to the heater is required. The second process sets a target value.