Multi-zone bipolar electrode channel arrangement for leakage reduction
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Solution Overview
Problem
Multi-zone ablation devices experience current leakage between electrode zones, leading to insufficient energy delivery and inadequate tissue ablation due to the physical arrangement and number of electrically distinct channels, resulting in reduced power delivery to the intended treatment area.
Innovation Solution
The ablation device is configured with a plurality of bipolar electrode zones, each having an in-zone channel pair with distinct positive and negative channels, where the total number of electrically distinct channels is less than twice the number of electrode zones, and the channels are arranged such that each zone's positive channel is distinct from adjacent zones' positive channels, and each zone's negative channel is distinct from adjacent zones' negative channels, reducing leakage effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple bipolar electrode zones are arranged adjacent to each other, then the ablation device can treat multiple tissue areas selectively, but current leakage occurs between adjacent zones reducing energy delivery efficiency
Solution Approach 1:
The ablation device divides the treatment area into multiple distinct bipolar electrode zones, each with its own positive and negative channels. This segmentation allows selective activation of individual zones for targeted tissue treatment while maintaining electrical isolation between zones to prevent current leakage and energy loss.
2Device complexity
If the total number of electrically distinct channels is reduced to less than twice the number of electrode zones, then device complexity is reduced, but current leakage and edge effects increase
Solution Approach 1:
The device combines electrical channels across multiple electrode zones such that the total number of electrically distinct channels is less than twice the number of zones. This merging reduces device complexity and the number of discrete channel connections while maintaining effective electrical isolation between adjacent zones through careful channel assignment and shared channel architecture.
3Power
If each electrode zone has its own distinct positive and negative channels, then in-zone current delivery is optimized, but adjacent-zone current leakage increases due to shared channels
Solution Approach 1:
The device implements local electrical isolation by ensuring that for any adjacent electrode zone pair, the positive channel of one zone is electrically distinct from the positive channel of the adjacent zone, and similarly for negative channels. This local differentiation maintains high in-zone power delivery while preventing adjacent-zone current leakage through strategic channel assignment.
Data Source
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AI summary
Methods, apparatuses, and systems are described for minimizing various leakage effects of multi-zone ablation devices. Apparatuses may include an ablation device for treatment of tissue including an ablation structure with a plurality of bipolar electrode zones. Each of the zones may include an in-zone channel pair comprising a positive channel and a negative channel. The ablation structure may be configured such that, for any adjacent electrode zone pair comprising a first electrode zone and a second electrode zone adjacent to the first electrode zone, the positive channel of the first electrode zone is electrically distinct from the positive channel of the second electrode zone, and the negative channel of the first electrode zone is electrically distinct from the negative channel of the second electrode zone. Moreover, the ablation structure may be arranged such that a total number of electrically distinct channels that is less than twice a total number of the plurality of electrode zones.