Emboli Capturing Device With Coil And Filtering Basket
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Solution Overview
Problem
Current treatments for carotid artery stenosis, such as surgery and angioplasty, pose risks of releasing blood clots and thrombi into the vasculature during procedures, necessitating a device and method for distal protection and emboli capture within body lumens.
Innovation Solution
An embolic capturing device comprising a basket with a filtering body and coils, deployable via catheter for percutaneous insertion, which expands to capture emboli downstream from the stenotic area during procedures like balloon angioplasty, utilizing a self-expandable filtering body made from materials like Nitinol or extracellular matrix for temporary adherence and retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carotid angioplasty is performed to treat stenosis, then the narrowed artery is opened and blood flow is improved, but there is a risk of releasing blood clots and thrombi into the vasculature
Solution Approach 1:
The filtering device is deployed downstream from the stenotic area before the angioplasty procedure begins. This preliminary positioning allows the filter to be in place and ready to capture any emboli that may be released during the subsequent balloon angioplasty procedure, thus preventing embolic events while allowing the stenosis treatment to proceed
Solution Approach 2:
The filtering device acts as an intermediary element between the stenotic area and the downstream vasculature. It intercepts and captures emboli that are dislodged during angioplasty, serving as a protective barrier that allows the therapeutic procedure to continue while preventing harmful emboli from reaching critical areas such as the brain
2Object-affected harmful factors
If a filtering device is deployed downstream to capture emboli, then embolic protection is provided, but the device occupies space within the body lumen and may affect blood flow
Solution Approach 1:
The filtering device employs a flexible mesh structure that can conform to the shape of the body lumen. This flexible design allows the filter to provide effective embolic capture while maintaining a low profile that minimizes obstruction to blood flow. The mesh structure permits fluid passage while intercepting larger embolic particles
Solution Approach 2:
The filter utilizes a porous mesh structure with appropriately sized openings that allow blood and small particles to pass through while capturing larger emboli. This porous design ensures that the filtering function is effective without creating significant flow resistance, thus maintaining blood flow capacity while providing embolic protection
3Ease of operation
If the filtering body is made self-expandable for easy deployment, then percutaneous insertion is facilitated, but the material selection is limited and may affect biocompatibility
Solution Approach 1:
The filtering device utilizes shape memory materials that change their physical properties in response to temperature changes. The device is delivered in a compressed state at lower temperature, then deployed by allowing it to return to its memorized expanded shape at body temperature. This parameter change approach enables easy percutaneous deployment while using biocompatible shape memory alloys
Solution Approach 2:
The filtering device employs composite construction combining shape memory alloy components for the frame with biocompatible mesh materials for the filtering body. This composite approach allows the structural benefits of self-expanding shape memory materials while ensuring biocompatibility through the use of medically approved mesh materials that are in direct contact with blood and tissue
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively captures emboli during stenosis procedures, reducing the risk of embolic events and providing a low-risk alternative to traditional treatments by ensuring emboli are trapped downstream from the stenotic area, thereby minimizing the risk of ischemic stroke.
Implementation Method 1
The filtering body is self-expandable and made from materials like Nitinol or extracellular matrix
Implementation Method 2
made from materials like Nitinol or extracellular matrix for temporary adherence and retrieval
Data Source
AI summary
An embolic capturing device for capturing emboli within a body lumen is disclosed. The embolic capturing device (10) comprises a filtering basket (20) and at least one coil (22) attached to the basket. The filtering basket includes a frame (23) and a filtering body (30) disposed on the frame. The at least one coil is attached to the filtering body for filtering emboli in the body lumen.