3D Vaso-Occlusive Device Structure for Anchoring and Occlusion
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Solution Overview
Problem
Existing vaso-occlusive devices designed for aneurysms often fail to adequately occlude blood vessels due to insufficient implant length and lack of anchoring, leading to migration and prolonged procedure times.
Innovation Solution
A vaso-occlusive device with a three-dimensional structure featuring non-parallel and non-perpendicular loops and helical sections, including a pyramidal portion and anchors, designed to securely anchor within blood vessels and enhance occlusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If aneurysm vaso-occlusive devices are used to occlude blood vessels, then the device can be deployed using existing delivery systems, but the device lacks sufficient implant length and anchoring capability, leading to migration and inadequate occlusion
Solution Approach 1:
The vaso-occlusive device is divided into multiple segments including a distal anchor portion, a mid-portion, and a proximal anchor portion. Each segment serves a specific function: the anchor portions provide securing against migration while the mid-portion provides occlusion. This segmentation allows the device to achieve sufficient implant length and anchoring capability while remaining compatible with existing delivery systems.
Solution Approach 2:
The device incorporates three-dimensional pyramidal structures with loops in non-parallel and non-perpendicular planes, transitioning from conventional two-dimensional planar coil configurations. This dimensional change enables the device to engage with vessel walls more effectively, providing enhanced anchoring and preventing migration while maintaining compatibility with standard delivery catheters.
2Device complexity
If aneurysm vaso-occlusive devices are used to occlude blood vessels, then the device structure is simple and familiar, but the device lacks anchoring features, causing migration along the blood vessel
Solution Approach 1:
The device incorporates pre-formed anchor portions at the distal and proximal ends that are designed to engage with the vessel wall before full deployment. These anchor portions include loops and pyramidal structures that are预先 configured to provide secure anchoring, preventing migration along the blood vessel while maintaining overall device simplicity.
Solution Approach 2:
The device combines different structural elements including pyramidal portions with loops in multiple planes, helical sections, and anchor portions into a single integrated structure. This composite design provides enhanced anchoring capability through the interaction of different structural components while maintaining manufacturability and device simplicity.
3Reliability
If multiple aneurysm vaso-occlusive devices are used to occlude a blood vessel, then adequate occlusion can be achieved, but the procedure time is prolonged
Solution Approach 1:
The invention merges multiple functional elements into a single integrated vaso-occlusive device. The distal anchor portion, mid-portion for occlusion, and proximal anchor portion are combined in one device, allowing complete occlusion of the blood vessel segment in a single deployment. This eliminates the need to deploy multiple separate devices, thereby reducing procedure time while maintaining complete occlusion.
Solution Approach 2:
The device performs multiple functions simultaneously: the pyramidal portions with multi-plane loops provide anchoring to prevent migration, the extended length provides sufficient implant coverage, and the mid-portion provides occlusion. This multi-functionality allows a single device to achieve complete occlusion without requiring multiple devices, thus reducing procedure time.
Data Source
AI summary
A vaso-occlusive device includes: an elongated member having a primary configuration when the vaso-occlusive device is in a constrained condition; wherein the elongated member forms a three-dimensional structure having a secondary configuration when the vaso-occlusive device is in an unconstrained condition, the three-dimensional structure comprising: a first pyramidal portion comprising a first set of at least three first loops lying within at least three different respective first planes that are non-parallel and non-perpendicular with respect to each other; and a first helical section formed from the wire and extending proximally from the first pyramidal portion.