Duodenal Ablation Catheter for Consistent Depth Control
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Solution Overview
Problem
Conventional vapor-based ablation systems face challenges in controlling energy deposition for uniform ablation, leading to insufficient or excessive treatment of duodenal tissue, and risk overheating healthy tissue due to inadequate pressure and temperature regulation.
Innovation Solution
A vapor ablation system with a catheter featuring expandable positioning elements and controlled fluid delivery, utilizing multiple stages of ablative fluid doses to achieve uniform ablation in the duodenum, minimizing tissue exposure and pressure increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional vapor-based ablation systems deliver ablative fluid continuously, then treatment time is reduced, but energy deposition becomes uneven causing insufficient or excessive ablation
Solution Approach 1:
The system implements multi-stage pulsed delivery of ablative fluid with intermittent waiting periods. Between fluid delivery stages, the system waits for structural changes in tissue layers (mucosa to submucosa transition) before delivering subsequent stages. This periodic action ensures uniform energy deposition while maintaining efficient treatment timing.
2Reliability
If vapor ablation system increases energy delivery to achieve effective ablation depth, then ablation effectiveness improves, but risk of overheating healthy tissue increases
Solution Approach 1:
The system performs preliminary structural assessment of tissue layers before delivering high-energy ablative fluid. By waiting for observable structural changes (mucosa layer transformation to submucosa layer) before subsequent energy delivery, the system ensures that energy is applied only when appropriate tissue depth is reached, preventing overheating of healthy superficial tissue while ensuring effective ablation of target tissue.
3Reliability
If ablative fluid is delivered at high pressure to increase ablation depth, then treatment efficacy improves, but pressure control precision decreases
Solution Approach 1:
The system dynamically adjusts fluid delivery pressure based on real-time tissue response and structural changes. Rather than maintaining constant high pressure, the system modulates pressure levels across multiple delivery stages, increasing pressure only when tissue structural changes indicate appropriate depth has been reached. This dynamic pressure control achieves deep penetration while maintaining precise control through adaptive response to tissue feedback.
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 system ensures consistent and controlled ablation of duodenal tissue, reducing the risk of healthy tissue damage and achieving therapeutic outcomes for conditions like metabolic syndrome and cancerous lesions.
Implementation Method 1
the controller is configured to heat the fluid to a threshold temperature to form a vapor
Implementation Method 2
delivering the vapor to the duodenal tissue in a multi-stage process... minimizing tissue exposure and pressure increase
Data Source
AI summary
Ablation catheters and systems include flexible catheter tips with at least one positioning element and ports for delivery of an ablative agent to a target tissue. The positioning element is used to define a treatment zone and position the catheter proximate the target tissue for ablation. Ablative fluid is delivered to the target tissue at subtherapeutic, therapeutic, or supratherapeutic doses over different time periods, with rest periods between each dose, to cause effective ablation of the target tissue.