Electrosurgical Generator With Impedance-Based Tissue Closure Control
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Solution Overview
Problem
Current high-frequency electrosurgical cutter systems lack the ability to adaptively control energy output in real time based on tissue state, leading to issues such as tissue adhesion and carbonization, which reduces the success rate of tissue closure and degrades bursting pressure.
Innovation Solution
An electrosurgical generator with a control module that dynamically adjusts energy output based on impedance parameters, using a series of sub-processes to ensure accurate and adaptive tissue closure, including impedance and phase calculations through discrete Fourier transform algorithms to determine control and ending parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-frequency electrical signals are applied to tissue to fuse tissue via electrical energy, then tissue closure is achieved, but tissue adhesion and carbonization occur, reducing success rate and bursting pressure
Solution Approach 1:
The patent applies dynamics by continuously monitoring tissue impedance in real-time during the electrosurgical procedure and dynamically adjusting the energy output parameters based on the measured impedance values. This allows the system to adapt to changing tissue conditions, preventing harmful effects like carbonization while maintaining effective tissue closure.
Solution Approach 2:
The patent implements feedback control by measuring tissue impedance during the procedure and using this information to adjust the energy delivery parameters. The system continuously monitors the tissue state and modifies the electrical energy output accordingly, creating a closed-loop control system that prevents tissue damage while ensuring successful closure.
2Adaptability or versatility
If fixed energy output is applied to tissue, then the procedure is simple to operate, but the system cannot adapt to different tissue states, causing tissue adhesion and carbonization
Solution Approach 1:
The patent applies self-service by enabling the electrosurgical system to automatically monitor its own operating conditions through impedance measurement and self-adjust its energy output parameters without requiring manual intervention. The system serves itself by detecting tissue state changes and autonomously modifying treatment parameters to optimize outcomes.
Solution Approach 2:
The patent implements parameter changes by varying electrical energy output parameters (such as power level, pulse duration, or frequency) based on real-time tissue impedance measurements. The system dynamically adjusts these parameters to match the tissue's electrical properties, enabling adaptive treatment while maintaining operational simplicity through automated control.
3Reliability
If energy is continuously applied to ensure tissue closure, then closure success rate improves, but tissue adhesion and carbonization increase, degrading bursting pressure
Solution Approach 1:
The patent applies periodic action by delivering electrical energy in controlled pulses or cycles rather than continuous application. The system intermittently applies energy while periodically measuring tissue impedance, allowing the tissue to respond and preventing excessive heating that would lead to carbonization and loss of tissue strength.
Solution Approach 2:
The patent applies partial action by delivering just enough electrical energy to achieve tissue closure based on real-time impedance feedback, rather than applying maximum continuous energy. The system adjusts the energy dosage to match the actual tissue needs, avoiding excessive energy application that would cause carbonization and compromise tissue bursting pressure.
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
Improves the success rate of tissue closure and increases bursting pressure by ensuring precise energy delivery tailored to the tissue's state, minimizing tissue adhesion and carbonization.
Implementation Method 1
determine at least one impedance parameter of the tissue based on sampling signals of the output energy
Implementation Method 2
The electrosurgical generator applies energy to a target tissue site via the cutter to achieve electrocuting, electrocoagulation, or tissue closure
Implementation Method 3
The high-frequency electrosurgical cutter system working in bipolar mode may output high-frequency electrical signals to the tissue to fuse the tissue via electrical energy
Data Source
AI summary
The embodiment of the present application provides an electrosurgical generator, an electrosurgical system and a control method thereof. The method includes: executing a plurality of sub-processes sequentially after it is determined that tissue has been effectively clamped between two electrodes of a cutter; each sub-process includes a state determination stage and a tissue fusion stage: wherein in the state determination stage of each sub-process, at least one control parameter and at least one ending parameter of the current sub-process is determined based on at least one impedance parameter of the tissue and at least one time parameter; in the tissue fusion stage of each sub-process, energy is output to the tissue according to the at least one control parameter of the current sub-process, and it is determined whether the current sub-process should be ended according to the at least one ending parameter of the current sub-process. Therefore, the technical solution provided by the embodiment of the present application can adaptively control the process of tissue closure, dynamically and accurately control the energy output to the tissue according to the closure state of the tissue, and improve the success rate of tissue closure and the bursting pressure of the tissue.