Temporary Aneurysm Neck Protection Device for Embolic Safety
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Solution Overview
Problem
Current methods for treating intracranial aneurysms, such as balloon and stent-assisted coiling, face challenges including thrombus formation, embolic debris displacement, and inadequate neck protection, which can lead to complications like thrombosis and embolism.
Innovation Solution
A temporary aneurysm neck protection device comprising a collapsible frame with a cover having specific porosity and permeability characteristics, designed to expand and conform to the blood vessel shape, providing effective protection during coiling procedures while minimizing thrombogenic risks and embolic events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stent or flow diverter is permanently implanted to protect the aneurysm neck, then neck protection and coil containment are improved, but thrombogenic risk and device complexity increase
Solution Approach 1:
The patent applies the disposable principle by using a temporary, non-permanent neck protection device that can be deployed and removed. The device is designed for single-use during the coiling procedure, eliminating long-term thrombogenic risks associated with permanent implants while providing necessary protection during the procedure. The temporary nature allows for reduced thrombogenicity compared to permanent stents.
Solution Approach 2:
The patent implements discarding and recovering by deploying a temporary protection device during the procedure and then removing it afterward. The device serves its protective function during coiling deployment and is subsequently discarded (removed from the body), avoiding the long-term complications of permanent implantation while maintaining protection when needed.
2Reliability
If a cover with low porosity is used to block aneurysm flow, then neck protection is improved, but coil deployment difficulty and device complexity increase
Solution Approach 1:
The patent applies porous materials by using a cover with controlled porosity that allows for both flow blocking and coil passage. The porous structure enables the cover to function as a filter-like barrier that contains coils within the aneurysm while blocking abnormal flow into the aneurysm sac, achieving protection without requiring a completely solid (and thus more complex) structure.
3Duration of action of stationary object
If a permanent implant is used for neck protection, then long-term protection is improved, but procedural complexity and patient risk increase
Solution Approach 1:
The patent uses a temporary protection device that is deployed only for the duration of the coiling procedure and then removed. This short-living approach simplifies the overall treatment strategy by avoiding the complexities of permanent implantation while providing adequate protection during the critical coiling phase. The device is designed for single-use, reducing procedural complexity compared to permanent solutions.
Data Source
AI summary
A device for temporarily protecting a neck of an aneurysm of a blood vessel is provided. The device includes a plurality of wires coiled to form a collapsible frame configured to expand and substantially conform to a shape of an inside surface of the blood vessel while the aneurysm is being treated. The device includes a retention wire disposed at a proximal end of the frame of the plurality of wires. The device includes a cover comprising at least a first portion configured to be disposed directly against a neck of the aneurysm while the aneurysm is being treated, the first portion having a first porosity to blood flow. Related methods of use and manufacturing are also provided.