Magnetic Bipolar Ablation Electrode Alignment
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Solution Overview
Problem
Current surgical ablation techniques for treating atrial fibrillation, such as bipolar RF ablation, face challenges in precision and control, leading to variable scar formation and excessive tissue damage due to the complexity of aligning electrodes on the atrial wall, which can result in repeated procedures and increased risk of complications like perforation and infection.
Innovation Solution
A minimally invasive system using complementary magnetic electrode assemblies that automatically align through mutual magnetic attraction, allowing for precise positioning and alignment of bipolar electrodes on opposing sides of the atrial wall, facilitating controlled RF energy delivery and reducing the need for manual alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual alignment of bipolar electrodes is used for RF ablation, then the procedure can be performed with simple equipment, but the alignment precision and consistency deteriorate leading to variable scar formation and excessive tissue damage
Solution Approach 1:
The patent replaces manual mechanical alignment with magnetic field-based automatic alignment. Magnetic electrodes are positioned using magnetic attraction forces that automatically draw them into proper alignment across the tissue, eliminating the need for complex mechanical positioning devices while achieving consistent sub-millimeter alignment precision.
Solution Approach 2:
The magnetic electrodes self-align through mutual magnetic attraction without requiring external positioning mechanisms. The electrodes actively seek their correct positions through magnetic forces, performing their own alignment function and eliminating the need for complex external alignment systems.
2Reliability
If unipolar RF ablation is used to create transmural lesions, then the procedure can be performed epicardially or endocardially, but the control over burn penetration deteriorates due to variable tissue composition and convective cooling
Solution Approach 1:
The patent combines epicardial and endocardial electrodes into a single bipolar ablation system. By placing electrodes on both sides of the tissue and delivering RF energy through the complete tissue thickness, the system achieves consistent transmural lesions regardless of tissue composition variations or blood flow cooling effects that plague unipolar approaches.
Solution Approach 2:
The patent changes the fundamental ablation parameter from unipolar to bipolar configuration. This parameter change enables controlled energy delivery through the entire tissue thickness by establishing both current entry and exit points, allowing precise control over burn depth and penetration while eliminating the variability caused by tissue composition and convective cooling.
3Reliability
If electrodes are moved slowly during ablation to ensure complete pathway interruption, then the ablation completeness improves, but the procedure time and tissue exposure to heat increase leading to excessive tissue destruction
Solution Approach 1:
The patent enables continuous movement of the bipolar electrode assembly through tissue while maintaining consistent RF energy delivery. The magnetic alignment system continuously maintains proper electrode positioning during movement, allowing the surgeon to move the electrode at optimal speed without stopping to realign, thereby completing the ablation pathway in a single continuous pass that reduces both time and heat exposure.
4Reliability
If repeat ablation procedures are performed to achieve desired results, then the treatment effectiveness improves, but the risk of complications and tissue damage multiplies
Solution Approach 1:
The patent replaces manual alignment with magnetic field-based automatic alignment, achieving consistent sub-millimeter electrode positioning that ensures complete ablation pathway interruption in a single procedure. This eliminates the need for repeat procedures and their associated complications.
Solution Approach 2:
The patent changes from unipolar to bipolar configuration with magnetic alignment, achieving reliable transmural lesions with complete pathway interruption in one procedure. This parameter change ensures treatment effectiveness while eliminating the need for repeat procedures that multiply complication risks.
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 system enhances the reliability and precision of RF ablation by ensuring consistent alignment of electrodes, reducing tissue damage and procedural complexity, thereby improving the efficacy of atrial fibrillation treatment while minimizing complications.
Implementation Method 1
the complementary magnetic electrodes automatically align their respective electrical conductors through mutual magnetic attraction to complete an electrical circuit
Implementation Method 2
bipolar electrodes for radiofrequency ablation
Data Source
AI summary
A device for automatically aligning bipolar electrodes on opposing sides of operative tissue is provided for performing minimally invasive RF ablation. The device includes complementary magnetic electrode assemblies, each having a permanent magnet mechanically coupled to and electrically insulated from an electrical conductor. When positioned on opposing sides of tissue such as an atrial wall, the complementary assemblies automatically align their respective electrical conductors through mutual magnetic attraction to complete an electrical circuit. Each electrical conductor may provide an alignable elongated transmitting element adjacent to a magnetic coupling surface to allow for ablation of linear segments of tissue. Each electrode assembly includes mechanical linkage for coupling to an intracorporeal positioning device and a wire receiving terminal for connection to an external generator.