Ablation Catheter User Interface for Precise Cardiac Tissue Lesioning
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Solution Overview
Problem
Current methods for treating atrial fibrillation, such as the Cox-Maze procedure and linear ablation, are complex, imprecise, and time-consuming, with high recurrence rates and risks of complications like pulmonary vein stenosis, highlighting the need for improved atrial ablation catheters and user interfaces that can safely and effectively deliver energy to cardiac tissue.
Innovation Solution
Development of ablation catheters with flexible carrier assemblies and sophisticated user interfaces that include visual displays and control interfaces to allow precise delivery of energy to cardiac tissue, enabling the creation of targeted lesions and simplifying the ablation process by providing geometric representations and adjustable energy parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional ablation methods (Cox-Maze procedure, linear ablation) are used, then tissue ablation can be achieved, but the procedures are complex, time-consuming, and imprecise with high recurrence rates
Solution Approach 1:
The catheter is divided into multiple segments or modules, each with specific ablation elements positioned at predetermined locations. This segmentation allows the complex ablation procedure to be broken down into manageable sections, improving precision while maintaining operational feasibility through modular design
Solution Approach 2:
The catheter is pre-configured with ablation elements positioned at optimal locations before insertion. The geometric relationships between elements are predetermined to ensure precise energy delivery to target tissue, eliminating the need for complex real-time positioning during the procedure
2Productivity
If traditional ablation methods are used, then tissue ablation can be achieved, but the procedures are time-consuming taking several hours
Solution Approach 1:
The catheter enables continuous ablation energy delivery through multiple elements simultaneously or in sequence without requiring repeated insertions or repositioning. The predetermined geometric configuration allows uninterrupted treatment of target tissue, significantly reducing overall procedure time
Solution Approach 2:
Multiple ablation elements are distributed along the catheter body, allowing simultaneous treatment of multiple tissue sites. This parallel processing approach reduces the total time required compared to sequential treatment with single-element catheters
3Reliability
If ablation elements are positioned close to or inside pulmonary veins, then complete ablation coverage can be achieved, but rapid stenosis and potential occlusion of pulmonary veins can result
Solution Approach 1:
The catheter incorporates elements with different characteristics at different locations. Elements near pulmonary veins have modified properties (such as reduced energy output or different geometry) compared to other elements, allowing effective ablation while minimizing thermal damage to vein walls and preventing stenosis
Solution Approach 2:
The system includes monitoring capabilities that provide real-time feedback on tissue temperature and ablation progress. This feedback mechanism allows dynamic adjustment of energy delivery to prevent excessive heating near pulmonary veins, thereby reducing the risk of stenosis while maintaining ablation effectiveness
4Measurement precision
If multiple ablation elements are used to improve precision, then energy delivery accuracy increases, but the device complexity and difficulty of operation increase
Solution Approach 1:
Multiple ablation elements are integrated into a single catheter body with unified control mechanisms. The elements share common positioning, power delivery, and control systems, simplifying operation despite having multiple active components. This merging approach maintains precision while improving ease of use
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
The ablation catheters and user interfaces enable efficient and precise energy delivery to cardiac tissue, reducing procedure time, minimizing tissue damage, and enhancing safety by allowing for real-time monitoring and adjustment of energy parameters, thereby improving the effectiveness of atrial fibrillation treatment.
Implementation Method 1
Ablation procedures may also involve the modification of the tissue without removal, such as to stop electrical propagation through the tissue in patients with an arrhythmia. Often the ablation is performed by passing energy, such as electrical energy, through one or more electrodes causing the tissue in contact with the electrodes to heat up to an ablative temperature.
Data Source
AI summary
Devices, systems and methods are disclosed for the ablation of tissue. Embodiments include an ablation catheter that has an array of ablation elements attached to a deployable carrier assembly. The carrier assembly can be constrained within the lumen of a catheter, and deployed to take on an expanded condition. The carrier assembly includes multiple electrodes that are configured to ablate tissue at low power. Systems include an interface unit with a visual display that provides a visual representation of the geometry of the ablation elements and/or provides selection means for selecting an icon provided on the display.