Expandable Electrode Array for Esophageal Ablation
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Solution Overview
Problem
Current methods for treating Barrett's esophagus lack precise control over energy depth penetration, leading to potential esophageal perforation, stricture, or bleeding, and are inefficient in treating the innermost mucosal layer while preserving deeper layers intact.
Innovation Solution
An electrode deployment device with a pre-selected electrode density on a dimensionally stable support, expandable to uniformly engage the esophageal surface, maintaining constant electrode density as it expands to accommodate varying lumen sizes, allowing controlled energy delivery to a specific depth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional energy delivery methods (laser, microwave, radio frequency) are used to treat Barrett's esophagus, then the abnormal epithelium can be ablated, but the depth of penetration cannot be precisely controlled, potentially causing esophageal perforation, stricture, or bleeding
Solution Approach 1:
The electrode array is divided into multiple segments along the esophagus, with each segment containing multiple electrodes spaced at specific intervals. This segmentation allows for controlled, localized energy delivery to specific depths of the esophageal wall while treating the entire circumference, preventing uncontrolled deep penetration that could cause perforation or stricture
Solution Approach 2:
The patent applies different electrode configurations and energy delivery parameters to different segments of the esophagus based on local tissue characteristics. The electrode density, spacing, and activation patterns are optimized for each location to achieve precise depth control tailored to the specific anatomical region being treated, thereby minimizing harmful effects while maintaining effective ablation
2Productivity
If conventional methods treat only a small portion of abnormal epithelium at one time, then energy delivery can be controlled, but treatment becomes time consuming, tedious, and costly
Solution Approach 1:
The patent combines multiple electrodes into a single expandable array that can treat the entire circumference of the esophagus simultaneously. By merging multiple treatment functions into one device that delivers energy to all affected areas in a single application, the treatment time is dramatically reduced compared to sequential point-by-point treatment methods
Solution Approach 2:
The electrode array is designed to be dynamically adjustable, expanding from a compressed delivery configuration to a deployed treatment configuration within the esophagus. This dynamic transformation allows the device to accommodate varying esophageal diameters while maintaining optimal electrode-tissue contact across the entire treatment area, enabling efficient comprehensive treatment without requiring multiple devices or procedures
3Adaptability or versatility
If the esophagus diameter varies from patient to patient, then the device must be adaptable, but maintaining constant electrode density becomes difficult
Solution Approach 1:
The electrode array is constructed with flexible, dynamically adjustable components that can expand and conform to different esophageal diameters. The electrodes are mounted on an expandable framework that maintains fixed spacing relationships between electrodes while adapting the overall array size to match the patient's anatomy, ensuring constant electrode density regardless of lumen size variations
Solution Approach 2:
The device utilizes changes in physical parameters (expansion ratio, radial force, electrode spacing) to adapt to different esophageal sizes. By controlling the expansion parameters of the array framework, the system maintains optimal electrode density and contact pressure across varying lumens, achieving both adaptability and precision through parameter optimization
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
Enables precise and uniform treatment of the esophageal mucosa while minimizing risk to deeper tissue layers, reducing the likelihood of complications such as perforation and stricture, and facilitating effective ablation of abnormal epithelium.
Implementation Method 1
Devices and methods for treating abnormal body tissue by application of various forms of energy to such tissue have been described, and include laser treatment, microwave treatment, radio frequency ablation
Implementation Method 2
The device and method, however, do not adequately control the application of energy to effect ablation of tissue to a controlled depth
Data Source
AI summary
Devices and methods are provided for treatment of tissue in a body lumen with an electrode deployment device. Embodiments typically include a device with a plurality of electrodes having a pre-selected electrode density arranged on the surface of a support. The support may comprise a non-distensible electrode backing that is spirally furled about an axis and coupled to an expansion member such as an inflatable elastic balloon. In some embodiments, the balloon is inflated to selectively expose a portion of the electrode surface while maintaining the electrode density.