Flexible Substrate Electrode Array for Duodenal Ablation
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Solution Overview
Problem
Current minimally invasive tissue ablation techniques face challenges in effectively treating targeted tissues, particularly in the duodenum, due to difficulties in controlling ablation depth and trauma to surrounding tissues during instrument delivery and retraction.
Innovation Solution
A flexible substrate with an electrode array is designed for minimally invasive tissue treatment, featuring a header and footer portion with arm segments, apertures, and a protective coating, which is expandable and retractable to minimize trauma and maintain position during treatment, allowing for controlled ablation and tissue regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rigid ablation instrument is used to achieve precise ablation control, then ablation precision is improved, but tissue trauma during delivery and retraction increases
Solution Approach 1:
The patent employs a flexible substrate made of elastomeric material that can be compressed within a catheter during delivery and then expanded at the target site. This flexible membrane structure allows the instrument to navigate through the duodenum without causing trauma while still providing precise ablation control when deployed, directly resolving the contradiction between rigidity for precision and flexibility for trauma-free delivery.
Solution Approach 2:
The instrument transitions from a compressed flexible state during delivery to an expanded state during ablation. The flexible substrate can be dynamically compressed within the catheter lumen and then expanded at the target site using a balloon or mechanical force, enabling the system to adapt its shape and size according to the operational phase - minimizing trauma during delivery while maintaining precision during treatment.
2Area of stationary object
If the electrode array is made larger to treat more tissue, then treatment coverage is improved, but control over ablation depth becomes more difficult
Solution Approach 1:
The electrode array is divided into multiple discrete electrodes distributed across the flexible substrate. This segmentation allows the large treatment area to be covered by multiple smaller electrode elements, each of which can be independently controlled for ablation depth. The segmented structure maintains precise control over ablation parameters while extending overall treatment coverage across the duodenal surface.
Solution Approach 2:
Different regions of the flexible substrate can be configured with varying electrode densities and configurations based on local treatment requirements. The electrode array is not uniform but rather adapted to provide appropriate treatment coverage and depth control for different anatomical regions of the duodenum, allowing customized ablation parameters for each zone.
3Ease of operation
If the flexible substrate is made smaller for easier delivery, then ease of delivery is improved, but the ability to treat targeted tissue is reduced
Solution Approach 1:
The flexible substrate is nested within the catheter during delivery, with the catheter acting as a containing structure that compresses the flexible membrane into a compact form. The substrate is then deployed at the target site by expanding it beyond the catheter lumen, allowing a large treatment area to be delivered through a small catheter. This nesting approach enables the system to pass through narrow duodenal passages while providing sufficient treatment surface area.
Solution Approach 2:
The flexible substrate transitions from a two-dimensional compressed state within the catheter lumen to a three-dimensional expanded configuration at the target site. By utilizing the radial dimension for deployment, the system can deliver a compact profile through the catheter while expanding to provide adequate treatment area contact with the duodenal mucosa, effectively adding a spatial dimension to the treatment capability.
4Reliability
If the electrode array is positioned deeper to treat more extensive tissue, then treatment effectiveness is improved, but trauma to surrounding tissues increases
Solution Approach 1:
The system incorporates sensors that detect tissue characteristics and ablation response in real-time, providing feedback to control the ablation parameters. This feedback mechanism allows the system to adjust energy delivery dynamically based on tissue depth and response, ensuring effective treatment while preventing excessive penetration that would cause damage to surrounding healthy tissues. The flexible substrate's ability to conform to tissue contours enhances this precise control.
Solution Approach 2:
The system dynamically adjusts ablation parameters such as energy level, pulse duration, and electrode configuration based on real-time tissue response. By changing these parameters adaptively rather than using fixed high-energy settings, the system can achieve effective treatment depth control while minimizing collateral damage to surrounding tissues, directly addressing the contradiction between treatment effectiveness and tissue trauma.
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 flexible substrate system enables precise and minimally invasive tissue ablation with reduced trauma, facilitating effective regeneration of healthy tissue by controlling ablation depth and minimizing damage to surrounding tissues.
Implementation Method 1
Another minimally invasive treatment technique involves electroporation of targeted tissues by localized application of an electrical field to increase permeability of cell membranes
Implementation Method 2
Some examples of minimally invasive tissue ablation techniques include electrolytic ablation
Data Source
AI summary
Apparatuses, systems, and methods are disclosed for providing controlled delivery of energy treatment to a tissue site. The systems, apparatuses, and methods may include medical instrument designs with features for retaining a flexible substrate with an electrode array in position against an expandable member during delivery to the tissue site, treatment, and retraction from the tissue site. The medical instrument further includes features for retaining the flexible substrate in a compact, stowed configuration during delivery and for retracting the flexible substrate post-deployment to facilitate retraction of the medical instrument after completion of treatment.