2D Polar Lesion Mapping for Pulmonary Vein Ablation Quality
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Solution Overview
Problem
Verifying the continuity, size, and effectiveness of lesions formed during tissue ablation procedures in tubular tissues, such as pulmonary veins, is difficult, which is crucial for preventing arrhythmias like atrial fibrillation.
Innovation Solution
A system and method using a catheter with expandable distal end assemblies, including an inflatable balloon for ablation and a lasso-shaped assembly for sensing, to provide quality measures of tissue ablation through a two-dimensional polar coordinate system graphical presentation, displaying lesion continuity and effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional verification methods are used to check lesion continuity and effectiveness, then the ablation procedure can be performed, but the verification time is prolonged and the quality assessment is difficult
Solution Approach 1:
The patent creates a two-dimensional polar coordinate map that copies and visualizes the three-dimensional lesion geometry and electrical properties. This graphical representation allows immediate assessment of lesion continuity, circumferential coverage, and quality without time-consuming traditional verification methods, directly resolving the contradiction between measurement precision and time loss
Solution Approach 2:
The system provides real-time feedback by displaying quality measures (such as voltage amplitude, lesion depth, and continuity) on the 2D polar map during and after ablation. This immediate feedback enables the operator to assess lesion effectiveness and make adjustments without prolonged verification, addressing both the precision and time concerns
2Manufacturing precision
If detailed quality measures are obtained through multiple electrodes, then the lesion quality improves, but the complexity of data presentation increases
Solution Approach 1:
The patent transforms complex three-dimensional lesion data from multiple electrodes into a two-dimensional polar coordinate system. This dimensional transformation consolidates multiple quality parameters (voltage, lesion depth, continuity) into a single intuitive visual map, improving lesion quality assessment while reducing data presentation complexity
Solution Approach 2:
The system merges multiple electrode signals and quality measures into a unified 2D polar map representation. By combining electrical voltage data, lesion geometry, and continuity information into a single graphical interface, the system maintains high lesion quality assessment capability while simplifying the overall data presentation structure
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
Improves the quality of lesions by providing immediate visualization of lesion properties, ensuring complete blockage of electrophysiological waves, reducing verification time, and enhancing the success and efficiency of ablation procedures.
Implementation Method 1
detect blood flow within a cavity of the heart by detecting electrical signals relating to dielectric properties
Implementation Method 2
an ablation balloon during placement at the ablation site... the ablation produces a lesion along the inner circumference
Data Source
AI summary
A method includes, receiving multiple signals from multiple respective electrodes arranged along an inner circumference of a blood vessel that has been ablated. Based on the multiple signals, one or more quality measures of the ablated blood vessel are produced. A graphical presentation indicative of the one or more quality measures, is displayed to a user in a two-dimensional (2D) polar coordinate system.