Multi-Electrode RF Catheter for Temperature-Controlled Ablation
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Solution Overview
Problem
Existing radiofrequency (RF) ablation technologies face challenges in efficiently ablating tissue with multiple electrodes while preventing adverse effects such as charring and steam popping, and there is a need for improved power management and temperature control to enhance procedural efficiency.
Innovation Solution
A catheter with multiple electrodes and integrated temperature sensors and a power supply that can deliver up to 100 W of RF energy simultaneously, with a processor managing power distribution based on temperature and impedance to prevent tissue damage, and a switch mechanism to toggle energy between electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high power RF energy is delivered to multiple electrodes simultaneously, then ablation efficiency and productivity are improved, but temperature control becomes difficult leading to tissue damage such as charring and steam popping
Solution Approach 1:
The patent divides the ablation process into sequential segments by toggling activation between multiple electrodes rather than activating them simultaneously. This segmentation allows each electrode to receive high power RF energy for efficient ablation while preventing cumulative heat buildup that would cause tissue damage.
Solution Approach 2:
The system employs periodic toggling of electrode activation where electrodes are switched on and off in a controlled sequence. This periodic action enables high power delivery during active periods for efficient ablation while providing cooling intervals during inactive periods to prevent temperature-related tissue damage.
2Loss of time
If high power RF energy is delivered to multiple electrodes simultaneously, then procedure time is reduced, but adverse tissue effects such as charring and steam popping occur
Solution Approach 1:
The system maintains continuous ablation action by toggling between multiple electrodes rather than allowing idle periods. While individual electrodes are switched off for cooling, other electrodes remain active, ensuring continuous therapeutic effect throughout the procedure without extending overall treatment time.
Solution Approach 2:
Periodic toggling of electrode activation enables high power delivery during active periods for efficient ablation while providing cooling intervals during inactive periods to prevent temperature-related tissue damage.
3Reliability
If temperature control is implemented to prevent tissue damage, then safety is improved, but power management complexity increases
Solution Approach 1:
The system incorporates temperature sensors that continuously monitor tissue temperature and provide feedback to the control mechanism. This feedback enables automatic adjustment of RF power delivery and electrode toggling timing to maintain safe temperature ranges while preventing tissue damage.
Solution Approach 2:
The system employs self-regulating mechanisms where temperature sensors detect temperature changes and automatically trigger electrode toggling or power adjustment without requiring complex external control systems. This self-service approach maintains safety while minimizing added complexity.
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
Enables efficient, high-power RF ablation sessions of short duration without adverse tissue effects, allowing for precise control and reduced procedure time.
Implementation Method 1
Tissue surrounding the electrode in the target region is destroyed by heating via RF electric current
Implementation Method 2
a select number of the electrodes have a temperature sensing device associated with them for providing a temperature signal indicative of the temperature at the interface between the electrode and tissue
Data Source
AI summary
Apparatus, including a catheter configured to be inserted into an organ of a human body. A plurality of electrodes are deployed on the catheter, the electrodes being configured to transfer radiofrequency (RF) ablation energy to tissue of the organ. The apparatus also includes a power supply configured to supply the RF ablation energy at a level of up to 100 W to each of the plurality of electrodes simultaneously, so as to ablate respective sections of the tissue of the organ in contact with the electrodes.