Tissue Expander With Support Rings For Endoscopic Resection
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Solution Overview
Problem
Current endoscopic mucosal resection techniques for colorectal cancer are hindered by difficulties in maintaining tissue lift, locating the submucosal layer, injecting lifting solutions, and repeatedly exchanging devices, due to tissue deformation and the complexity of the procedure.
Innovation Solution
A medical device comprising a tissue expander with support rings and spacers that expand to create a stable cylindrical shape for tissue resection, coupled with a removal tool that moves along a defined path to facilitate precise cutting and tissue removal, reducing the need for saline injection and device exchanges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional endoscopic resection techniques are used, then tissue can be removed, but the procedure is time-consuming and difficult due to tissue deformation and deflecting when pressure is applied
Solution Approach 1:
The tissue expander is deployed before the resection tool to preliminarily expand and stabilize the tissue, creating a stable working environment before the actual cutting procedure begins. This preliminary expansion prevents tissue deformation during subsequent cutting operations.
Solution Approach 2:
The device is divided into separate functional components: a tissue expander module and a resection tool module. This segmentation allows each component to perform its specific function optimally - the expander stabilizes tissue while the resection tool performs precise cutting, resolving the operational difficulty.
2Reliability
If conventional injection needles are used, then lifting solution can be injected, but it is difficult to inject through conventional needles and maintain adequate lift height
Solution Approach 1:
The tissue expander combines multiple functions into a single device: it includes both the expansion mechanism and the lifting solution delivery system. This merging eliminates the need for separate injection needles and allows reliable delivery of lifting solution while maintaining adequate lift height throughout the procedure.
Solution Approach 2:
The tissue expander serves multiple functions simultaneously: it expands tissue to create working space, delivers lifting solution through integrated channels, and maintains tissue elevation. This multi-functionality resolves the operational difficulties of using separate injection needles.
3Adaptability or versatility
If multiple devices are exchanged through the endoscope, then different functions can be performed, but the procedure complexity increases and time is lost
Solution Approach 1:
The system merges the tissue expander and resection tool into a combined assembly that can perform multiple functions through a single device exchange. The expandable support structure provides adaptability for different resection needs while eliminating the need to exchange multiple separate devices through the endoscope.
Solution Approach 2:
The support structure is designed to be dynamically expandable from a compact delivery configuration to an expanded working configuration. This dynamic transformation allows the device to adapt to different procedural requirements without requiring exchange of multiple static devices, reducing procedural complexity.
4Manufacturing precision
If the tissue is expanded to facilitate resection, then cutting precision is improved, but the device structure becomes more complex
Solution Approach 1:
The expandable support structure is segmented into multiple expandable elements that can be independently actuated. This segmentation allows precise control of tissue expansion to create stable cutting planes, improving cutting precision while managing structural complexity through modular design.
Solution Approach 2:
The support structure transitions from a compact static delivery state to an expanded dynamic working state. This dynamic capability allows the device to provide stable tissue support for precise cutting only when needed, while maintaining a simple structure during delivery, thus balancing precision requirements with structural simplicity.
Data Source
AI summary
A device for treating tissue may include a tissue expander configured to be inserted into a body lumen and stretch tissue surrounding the body lumen, and a tool configured to be coupled to the tissue expander and move along a path defined by the tissue expander.