Intravascular Filter Leaflets Aortic Seal
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Solution Overview
Problem
Current technologies fail to effectively prevent particles such as emboli from entering the bloodstream, which can lead to tissue damage and death due to their inability to form a reliable seal within blood vessels.
Innovation Solution
An intravascular device featuring a primary frame with an elongated wire and supporting elements, along with a filter composed of woven fibers or mesh, which expands to fill the aorta and forms a continuous filter surface, preventing particles from bypassing the filter and entering secondary blood vessels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter is deployed in the aorta to block particles, then particle capture effectiveness is improved, but fluid bypass around the filter increases
Solution Approach 1:
The filter is divided into multiple leaflets (distal leaflet, intermediate leaflet, proximal leaflet) that can be independently positioned and sealed against the aortic wall. Each leaflet creates a separate sealing surface, collectively forming a complete seal that prevents fluid bypass while maintaining particle capture effectiveness.
Solution Approach 2:
The filter transitions from a two-dimensional mesh structure to a three-dimensional conical configuration with multiple radially extending leaflets. This dimensional change allows the filter to engage the aortic wall at multiple points around its circumference, creating radial seals that prevent fluid bypass while maintaining the filtering function.
2Reliability
If the filter expands to fill the aorta to prevent bypass, then sealing effectiveness is improved, but device complexity increases
Solution Approach 1:
The filter employs a dynamic deployment mechanism where the frame expands from a compressed delivery state to an expanded deployed state. The leaflets are configured to radially extend and contact the aortic wall during expansion, automatically forming seals without requiring additional actuation mechanisms. This dynamic transformation achieves effective sealing while minimizing structural complexity.
Solution Approach 2:
The filter utilizes flexible leaflets made of biocompatible material that can conform to the aortic wall surface. These thin film structures are capable of elastic deformation during deployment, allowing them to seal against the irregular aortic surface geometry. The flexibility of the leaflets enables effective sealing without requiring complex rigid sealing mechanisms.
Data Source
AI summary
This invention relates to devices that are inserted in a blood vessel or other body lumen, and in particular to filter that may block particles from entering a blood vessel. Devices of this invention position and secure a filter in a vascular system to intercept particulates, including emboli.