Collapsible Tissue Collection Device for Catheter Navigation
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Solution Overview
Problem
Traditional atherectomy devices face challenges with insufficient tissue collection and storage capacity, leading to incomplete procedures and potential redeposition of debris, as well as difficulties in navigating tight vessel regions due to large crossing profiles, and issues with fluid trapping that reduces storage efficiency.
Innovation Solution
A tissue collection device with an adjustable crossing profile and venting elements, featuring a collapsible tissue storage reservoir that can change configurations to accommodate more tissue while minimizing the crossing profile, and a detachable design for easy cleaning and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the tissue storage reservoir is made larger to increase storage capacity, then more tissue can be collected, but the crossing profile becomes larger making it difficult to navigate tight vessel regions
Solution Approach 1:
The tissue collection device employs a dynamic structure where the tissue storage reservoir can be compressed to a reduced profile configuration for navigation through tight vessel regions, and then expanded to a full configuration to maximize tissue storage capacity during the procedure. This dynamic transformation allows the device to adapt its size based on procedural needs.
Solution Approach 2:
The device incorporates a nested structure where the tissue storage reservoir can be collapsed or compressed within a smaller outer profile, allowing the larger storage capacity to be contained within a smaller crossing profile during navigation, similar to nested dolls.
2Quantity of substance
If the tissue storage reservoir is made larger to increase storage capacity, then more tissue can be collected, but the device complexity increases
Solution Approach 1:
The device is divided into separable components including a cutter section and a tissue collection device with the storage reservoir. This segmentation allows the complex tissue collection function to be isolated in a modular unit that can be independently designed, manufactured, and sterilized, reducing overall system complexity while maintaining large storage capacity.
Solution Approach 2:
The tissue collection device is designed as a disposable single-use component. This approach simplifies the overall system by eliminating the need for complex cleaning, sterilization, and maintenance mechanisms, while allowing the reservoir to be optimally sized for maximum storage capacity without concern for reusability.
3Productivity
If the tissue storage reservoir is sealed to prevent debris escape, then tissue collection efficiency improves, but fluid trapping occurs reducing storage efficiency
Solution Approach 1:
The tissue storage reservoir incorporates a porous or mesh-like structure that allows fluid to pass through while retaining solid tissue debris. This porous design prevents fluid trapping that would reduce storage capacity, while still maintaining effective tissue collection by filtering debris from the fluid stream.
Solution Approach 2:
The reservoir employs a flexible membrane or thin-walled structure that can deform to accommodate tissue while allowing fluid to escape through the walls. This flexible design maintains sealing for tissue retention while providing fluid venting pathways to prevent pressure buildup and maximize storage efficiency.
Data Source
AI summary
Versatile tissue collection devices that can provide reduced crossing profiles, fluid pressure release, and/or easy cleaning or removal. In particular, devices having tissue collection devices with multiple configurations to facilitate navigation through narrow vessel cross-sections while also providing adequate tissue storage capacity. Additionally, the devices may include detachable components that allow easy removal, cleaning, and replacement during a procedure. Furthermore, venting elements and sections may be included to relieve fluid buildup in storage reservoirs.