Aneurysm Closure Device with Stabilizer for Wide-Neck Aneurysms
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Solution Overview
Problem
Current minimally invasive surgical techniques for treating aneurysms, particularly wide-neck and bifurcation aneurysms, face challenges in accurate placement and retention of vaso-occlusive devices, leading to risks of complications such as recanalization, migration, and blood flow issues, due to the complexity of anatomical structures and the difficulty in completely occluding the aneurysm neck.
Innovation Solution
An aneurysm closure device with a closure structure and supplemental stabilizer, featuring a curved portion that extends along a vessel and exerts outward force, and a stabilizer that presses against a parent vessel, designed to occlude the aneurysm neck and maintain embolic coils or coagulative materials within the aneurysm, while allowing for customizable deployment to fit specific anatomical sites using a delivery wire and detachment mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional vaso-occlusive devices are used to treat wide-neck and bifurcation aneurysms, then the procedure can be performed minimally invasively, but accurate placement and retention of the devices becomes difficult due to anatomical complexity
Solution Approach 1:
The closure device is divided into multiple segments including a first closure segment and a second closure segment that can be deployed separately. This segmentation allows each segment to be positioned independently to accommodate the complex geometry of wide-neck and bifurcation aneurysms, improving placement accuracy while maintaining minimally invasive access
Solution Approach 2:
The closure device incorporates structures that extend beyond the simple planar configuration, with elements projecting into the aneurysm sac and along the vessel wall in three-dimensional space. This multi-dimensional configuration enables the device to engage with the complex anatomical structures of wide-neck and bifurcation aneurysms from multiple directions, enhancing retention and placement precision
2Reliability
If the aneurysm neck is completely occluded to prevent blood flow into the aneurysm, then the risk of complications is reduced, but the complexity and length of the procedure increases
Solution Approach 1:
The closure device combines multiple functions into a single integrated structure: occlusion of the aneurysm neck, stabilization of embolic coils, and support for coagulative materials. This merging of functions achieves complete occlusion and complication prevention while reducing procedural complexity compared to using multiple separate devices
Solution Approach 2:
The closure device is designed with multi-functionality to address various aspects of aneurysm treatment simultaneously. The same device structure provides neck occlusion, coil retention, and material stabilization, thereby achieving reliable complication prevention without proportionally increasing procedure complexity
3Duration of action of moving object
If embolic coils are placed within the aneurysm to promote occlusion, then short-term occlusion is achieved, but the coils may migrate or allow recanalization over time
Solution Approach 1:
The closure device is deployed first to establish a stable framework and secure the aneurysm neck before placing embolic coils. This preliminary action creates a containment structure that prevents subsequent coil migration and maintains long-term occlusion, addressing the reliability issue while preserving the short-term occlusion benefit
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 reduces the complexity and length of minimally invasive procedures, enhances the stability of occlusive devices, and prevents blood flow into the aneurysm, thereby reducing the risk of complications and promoting physiological restoration of the blood vessel.
Implementation Method 1
The closure structure can be configured to exert a radially outward force against a vessel wall at the target site
Implementation Method 2
The supplemental stabilizer is configured to exert an outward force against a parent vessel
Data Source
AI summary
Implantable therapeutic devices and methods for endovascular placement of devices at a target site, such an opening at a neck of an aneurysm, are disclosed. Selected embodiments of the present technology have closures that at least partially occlude the neck of an aneurysm to stabilize embolic or coagulative treatment of the aneurysm.