Multi-Electrode RF Ablation System with Impedance Control
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Solution Overview
Problem
Existing ablation systems face challenges in efficiently controlling radio frequency (RF) power applied through multiple electrodes, which affects the effectiveness and efficiency of the ablation process.
Innovation Solution
A system comprising a main amplification unit, a sub-amplification unit, switching units, and a control unit that sequentially applies and monitors RF power to pairs of electrodes, calculating tissue impedance and adjusting power output based on reference values to optimize ablation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RF power is applied through multiple electrodes simultaneously, then ablation effectiveness is improved, but control complexity increases
Solution Approach 1:
The patent divides the control of RF power into separate switching units for main RF power and sub-RF power. Each switching unit independently controls power distribution to different electrodes, breaking down the complex multi-electrode control into manageable segments that can be controlled separately while achieving effective ablation.
Solution Approach 2:
The control unit dynamically switches between different electrode configurations and power levels based on real-time monitoring of voltage and current. The system adapts power distribution by calculating tissue impedance and adjusting main RF power and sub-RF power levels, enabling flexible control that responds to changing tissue conditions during ablation.
2Productivity
If RF power is applied through multiple electrodes sequentially, then control efficiency is improved, but ablation time increases
Solution Approach 1:
The patent employs periodic switching between different electrode pairs, applying RF power in structured cycles. The control unit monitors voltage and current over predetermined time periods, then switches to different electrode configurations in a periodic manner, balancing control efficiency with continuous ablation progress.
Solution Approach 2:
The system maintains continuous ablation by seamlessly transitioning between different electrode pairs. While one pair of electrodes is being monitored, another pair is prepared or already active, ensuring that the ablation process continues without interruption. The control unit coordinates switching to maintain uninterrupted power delivery to tissue.
3Measurement precision
If impedance monitoring is performed continuously, then power control precision is improved, but system complexity increases
Solution Approach 1:
The patent implements impedance monitoring at strategically chosen intervals rather than truly continuous monitoring. The control unit monitors voltage and current over predetermined time periods when specific electrode pairs are active, providing sufficient precision for safe and effective ablation without requiring complex continuous monitoring systems for all electrodes simultaneously.
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 allows for efficient control of RF power, reducing the time required for ablation and enabling effective treatment of multiple body parts, thereby shortening surgical procedures.
Implementation Method 1
a main amplification unit providing main radio frequency (RF) power by amplifying received power; a sub-amplification unit providing sub-RF power by amplifying received power
Implementation Method 2
a first switching unit transmitting the main RF power provided by the main amplification unit to one of first to third electrodes; a second switching unit transmitting the sub-RF power provided by the sub-amplification unit to one of the first to third electrodes
Implementation Method 3
monitoring a voltage and a current of a side to which the main RF power and the sub-RF power are applied for a predetermined period of time; calculating a degree of impedance of tissue using monitored voltage and current values
Implementation Method 4
Ablation systems use one or more electrodes to apply radio frequency (RF) power to the body and thus to form an ablation volume in the body
Implementation Method 5
applying RF power to a pair of respective electrodes previously selected from the first to third electrodes
Data Source
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AI summary
Disclosed are a system for ablation utilizing multiple electrodes and a method for controlling same. The system for ablation can comprise: a main amplification unit for amplifying received power and supplying main RF power; a sub amplification unit for amplifying received power and supplying sub RF power; a first switching unit for transmitting the main RF power supplied by the main amplification unit to any one from among first to third electrodes; a second switching unit for transmitting the sub RF power supplied by the sub amplification unit to any one from among the first to third electrodes; and a control unit for controlling the first and second switching units so that the main RF power and sub RF power are each applied to a pre-set electrode pair from among the first to third electrodes.