Expandable Vascular Drain Device for Embolic Material Capture
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Solution Overview
Problem
Existing vascular procedures face challenges with embolic material release during treatments, leading to potential embolisms and systemic dispersion of therapeutic agents, necessitating improved devices for capturing and isolating such materials.
Innovation Solution
A medical device with an expandable member that can be deployed downstream of a treatment site to establish apposition with a body lumen, allowing selective filtering and draining of fluid and material, featuring a valve member for controlled flow through a tube lumen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an expandable member is deployed to capture embolic material, then the ability to filter and capture material is improved, but the device complexity increases
Solution Approach 1:
The device is divided into distinct functional segments: an expandable member for filtering/capturing material, a tube lumen for fluid communication, and a valve member for flow control. This segmentation allows each component to perform its specific function efficiently while maintaining overall system reliability.
Solution Approach 2:
The tube lumen is positioned within or alongside the expandable member, creating a nested configuration where the filter structure contains or surrounds the fluid communication pathway. This nesting integrates multiple functions (filtering and fluid transport) into a compact unified structure.
2Ease of operation
If a valve member is added to selectively block flow, then the control over therapeutic agent removal is improved, but the device complexity increases
Solution Approach 1:
The valve member is configured to be operable from the proximal end of the device, allowing the operator to control flow selectively without requiring additional actuators or complex control mechanisms. This self-service approach simplifies the overall device structure while maintaining ease of operation.
3Reliability
If the expandable member extends distally beyond the distal end, then the filtering capability is improved, but the device length increases
Solution Approach 1:
The expandable member transitions from a collapsed low-profile state during delivery to an expanded three-dimensional structure at the distal end. This dimensional change allows the filter to extend beyond the distal end of the main tube when deployed, increasing filtering surface area and effectiveness without significantly increasing the overall device length during the delivery phase.
Data Source
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AI summary
A medical device may include an elongate tubular member defining a tube lumen, and an expandable member disposed on the distal portion of the elongate tubular member including a lumen that is in fluid communication with the tube lumen. The expandable member is configured to expand from a collapsed delivery configuration to a distally-open expanded configuration and establish apposition with a vessel wall. A valve member in fluid communication with the tube lumen, and configured to selectively block and selectively allow for flow through the tube lumen. The device may be percutaneously-deployable downstream of a treatment site within a body lumen and may allow for selective removal and/or draining of fluid and/or material, such as embolic material, from a body lumen.