Tethered Basket Emboli Capture System for Stroke Recanalization
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Solution Overview
Problem
Current embolic capture devices for treating ischemic or hemorrhagic stroke are limited in their ability to effectively and safely remove emboli from the vasculature, particularly in small intracranial vessels, due to stiffness, difficulty in deployment, and risk of hemorrhagic complications associated with existing stent technologies.
Innovation Solution
A tethered basket-like system integrated with a microcatheter for arterial support and emboli capture, allowing for flexible deployment and retrieval, with a mesh capturer that can be expanded to contain emboli and filter potential distal migration of particles, ensuring minimal vascular damage and improved recanalization rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing stent technologies are used for emboli removal, then recanalization can be achieved, but the risk of hemorrhagic complications increases and the devices are difficult to deploy in small intracranial vessels
Solution Approach 1:
The device is divided into two functional components: a microcatheter for delivery and a collapsible basket for emboli capture. This segmentation allows the device to navigate small vessels via the microcatheter while the basket remains compact during delivery, then expand to capture emboli, thereby achieving recanalization with reduced hemorrhagic risk compared to rigid stents
Solution Approach 2:
The basket is designed with flexible, collapsible structure that can be compressed within the microcatheter for delivery through small intracranial vessels, then expanded at the target site to capture emboli. This flexibility reduces deployment difficulty and allows access to vessels where rigid stents cannot be safely placed
2Reliability
If rigid stent structures are used for emboli capture, then emboli can be contained, but the difficulty of deployment in small vessels increases and vascular damage risk rises
Solution Approach 1:
The basket transitions from a compressed static state during delivery to an expanded dynamic state at the target site. This dynamic transformation allows the device to navigate small vessels in a compact form, then expand to provide effective emboli containment, resolving the contradiction between containment capability and deployment ease
Solution Approach 2:
The collapsible basket is nested within the microcatheter during delivery, allowing the larger emboli capture structure to pass through small vessels via the smaller catheter. Once deployed, the basket expands outward from the microcatheter to provide effective emboli containment without requiring direct manipulation in the small vessel
3Reliability
If multiple passes with clot retriever are required, then recanalization can be achieved, but the procedure time increases and hemorrhagic transformation risk increases
Solution Approach 1:
The device is pre-loaded with the collapsible basket within the microcatheter, ready for immediate deployment upon reaching the embolus. This preliminary preparation eliminates the need for multiple passes and device exchanges, achieving recanalization in a single procedure while reducing procedure time and hemorrhagic transformation risk
Data Source
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AI summary
Devices, methods, and systems facilitate and enable treatment of ischemic stroke. More specifically, a tethered basket-like system operates in conjunction with a microcatheter system, to provide arterial support and capture emboli.