Vascular Device Elastic Member Increases Mesh Density
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Solution Overview
Problem
Conventional occluding devices for aneurysms rely heavily on physician skill to achieve consistent density at the neck, leading to inconsistent blood flow reduction and increased risk of aneurysm rupture.
Innovation Solution
A vascular device with a mesh structure and an elastic member that increases density by drawing proximal and distal ends toward each other, reducing blood flow into the aneurysm and promoting thrombosis, thereby preventing rupture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional occluding devices are used, then blood flow reduction into aneurysm is achieved, but density consistency at the neck is poor due to reliance on physician skill
Solution Approach 1:
The patent applies parameter changes by modifying the density of the mesh structure in specific regions. The neck region is designed with higher member density compared to other portions, creating a predetermined density pattern that ensures consistent blood flow reduction regardless of deployment variations. This is achieved by adjusting the spacing and arrangement of mesh members in the neck region during manufacturing.
2Reliability
If mesh structure density is increased in the neck region, then blood flow reduction is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by creating a mesh structure with non-uniform density distribution. The neck region specifically has higher member density while other portions maintain lower density. This localized differentiation optimizes blood flow reduction at the critical neck area without unnecessarily increasing complexity throughout the entire device structure.
3Reliability
If elastic member is added to adjust density, then blood flow reduction reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the mesh structure with predetermined density patterns during manufacturing. The elastic member is pre-attached to specific regions, and the mesh geometry is pre-designed to achieve the desired density distribution upon deployment. This eliminates the need for complex real-time adjustments during the procedure.
4Manufacturing precision
If mesh members are closely spaced, then density is increased for better blood flow control, but ease of manufacture decreases
Solution Approach 1:
The patent applies segmentation by dividing the mesh structure into distinct regions with different density characteristics. The neck region is segmented as a separate functional zone with higher density, while other portions maintain lower density. This regional segmentation simplifies the manufacturing process by allowing different fabrication parameters to be applied to different sections.
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 consistently and reliably reduces blood flow into the aneurysm, leading to thrombosis and a lower risk of rupture, independent of physician skill during deployment.
Implementation Method 1
an elastic member disposed along a region of the structure... wherein the elastic member is configured to increase the density within the region by drawing at least one of the proximal and distal ends of the region toward the other
Data Source
AI summary
A vascular device is provided that includes a mesh structure formed of a plurality of spaced members. The structure has (i) a first, collapsed configuration, (ii) a second, expanded configuration, and (iii) a density of the plurality of members. The vascular device further includes an elastic member disposed along a region of the structure, the region having a proximal end and a distal end. The elastic member is configured to increase the density within the region by drawing at least one of the proximal and distal ends of the region toward the other of the proximal and distal ends when the structure is in the second configuration.