Clot Retrieval Device with Collapsible Hoop and Funnel Mechanisms
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Solution Overview
Problem
Conventional methods for removing occlusive material from blood vessels face challenges such as debris embolization, difficulty in controlling fragment size, and cumbersome deployment mechanisms, which can lead to complications during thrombectomy and atherectomy procedures.
Innovation Solution
The development of low-profile clot retrieval devices with collapsible hoop and funnel mechanisms that deploy within the blood vessel to capture and extract occlusive material, using a net shaft or deployment wire to ensure reliable and controlled removal of clots, with optional features like shape memory metals and stabilizing wires for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vascular filters are used to catch dislodged fragments, then debris embolization is prevented, but device complexity and difficulty of deployment increase due to complex actuation mechanisms
Solution Approach 1:
The device is divided into separate functional components: an outer catheter for delivery, an inner shaft for actuation, and a basket for debris capture. This segmentation allows each component to be optimized independently and simplifies the overall deployment mechanism compared to integrated conventional designs.
Solution Approach 2:
The inner shaft is nested within the outer catheter, and the basket is collapsed within the delivery system during introduction. This nested configuration enables low-profile delivery through small access sites while maintaining the full functionality of each component during deployment.
2Productivity
If thrombectomy procedures are performed to mechanically remove stenosis, then blood flow restoration is achieved, but debris embolization risk increases due to dislodged fragments
Solution Approach 1:
The basket acts as an intermediary device that captures dislodged debris during the thrombectomy procedure. By positioning the basket at the treatment site, it intercepts fragments before they can embolize downstream, allowing aggressive thrombectomy to be performed safely.
Solution Approach 2:
The device converts the harmful effect of debris dislodgement during thrombectomy into a beneficial outcome by capturing those same debris fragments. The mechanical removal process that creates debris also activates the capture mechanism to collect and remove that debris, turning a potential complication into a controlled process.
3Length of moving object
If low-profile delivery is achieved for clot retrieval devices, then ease of insertion is improved, but deployment control and reliability may be compromised
Solution Approach 1:
The basket transitions from a collapsed static configuration during delivery to an expanded dynamic configuration during deployment. This dynamic transformation allows the device to maintain a low delivery profile while achieving full deployment control and functionality at the treatment site through controlled expansion mechanisms.
Data Source
AI summary
Methods and devices for catheter-based removal of unwanted tissue or occlusive matter from blood vessels and other body lumens rely on a wire advanced from a tube to deploy a capture net that can be drawn over the clot. Apparatus include simple and reliable mechanisms for deployment of nets, funnels, and other clot capturing mechanisms for retrieving clot material from inside a blood vessel.