Ablation Timing Control for Time-to-Isolation Energy Cutoff
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Solution Overview
Problem
Existing catheter ablation procedures for cardiac arrhythmias, particularly atrial fibrillation, lack effective real-time physiological monitoring to optimally titrate energy delivery, leading to potential collateral tissue damage and incomplete pulmonary vein occlusion.
Innovation Solution
A timing system with automated timers and a control system that allows operators to set specific time settings for ablation procedures, including pre- and post-isolation times, to automatically control energy delivery and minimize collateral tissue damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If manual timing methods are used during ablation procedures, then operators can monitor elapsed time, but they cannot effectively reduce total energy delivery and potential collateral tissue damage
Solution Approach 1:
The system continuously monitors the ablation procedure progress and provides real-time feedback to the automated timer, which adjusts energy delivery timing based on detected isolation events. This closed-loop feedback mechanism enables the system to automatically terminate ablation when isolation is achieved, preventing excessive energy delivery and collateral tissue damage.
Solution Approach 2:
The automated timer system performs timing functions independently without requiring continuous manual intervention. It automatically detects isolation events through integrated sensors, calculates appropriate timing parameters, and controls energy delivery termination, allowing the system to serve itself rather than relying on operator timing judgments.
2Reliability
If ablation energy is delivered for extended periods to ensure complete tissue necrosis, then therapeutic effect is improved, but collateral tissue damage increases
Solution Approach 1:
The system performs preliminary detection of isolation events during the ablation procedure using integrated sensors that monitor electrical conductivity changes. By detecting isolation before the predetermined maximum time expires, the system can terminate ablation early, ensuring complete tissue necrosis while avoiding unnecessary extended energy delivery that would cause collateral damage.
Solution Approach 2:
The ablation timing is made dynamic rather than fixed. The system continuously evaluates real-time physiological parameters and adjusts the ablation duration accordingly. When isolation is detected, the timing parameter changes from the maximum predetermined duration to the actual achieved isolation time, optimizing the balance between therapeutic effect and tissue safety.
3Ease of operation
If operators use simple timers to track ablation duration, then procedure monitoring is simple, but real-time physiological monitoring to optimally titrate energy delivery is insufficient
Solution Approach 1:
The system merges the simple timing function with sophisticated physiological monitoring capabilities into a single integrated automated timer device. The basic timing operation remains simple to use, while internally it combines multiple sensor inputs, signal processing algorithms, and automated control functions to achieve precise real-time physiological monitoring and optimal energy delivery titration.
Solution Approach 2:
The automated timer serves multiple functions simultaneously: it tracks elapsed time, detects isolation events through integrated sensors, calculates optimal ablation duration, controls energy delivery timing, and provides safety monitoring. This multi-functional device replaces both simple manual timers and complex separate monitoring systems with a single universal tool.
Data Source
AI summary
A timing system during an ablation procedure having a time to isolation includes an automated timer that receives a first time setting. The first time setting provides a maximum time that the ablation procedure can continue without reaching the time to isolation. A catheter system including the timing system can also include a control system that is configured to automatically stop the ablation procedure if the first time setting expires without reaching the time to isolation. The operator can input the first time setting via a graphical display of the catheter system. The automated timer can generate an expiration signal if the first time setting expires without reaching the time to isolation. The automated timer can further receive a second time setting from the operator that provides a maximum time that the ablation procedure can continue after reaching the time to isolation.