Aneurysm Occlusion Device With Control Ring
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Solution Overview
Problem
Current occlusion devices for treating aneurysms, such as embolic coils, face challenges like re-canalization and coil compaction over time, making it difficult to effectively block blood flow into the aneurysm and requiring a retrievable and repositionable solution.
Innovation Solution
A tubular occlusion device with a control ring and expandable structure that can be inserted through the vasculature, expanded within the aneurysm, and secured with embolic coils, allowing for repositioning and retrieval, and optionally combined with a collapsible cage-like vaso-occlusive structure to enhance occlusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If embolic coils are used to fill the aneurysm sac, then the aneurysm is occluded from blood pressure and flow, but re-canalization and coil compaction occur over time reducing effectiveness
Solution Approach 1:
The occlusion device features an expandable tubular structure that can be dynamically adjusted between collapsed and expanded states. The control ring allows the proximal end region to maintain a fixed collapsed state while the distal end region expands within the aneurysm sac, creating a dynamic system that adapts to the treatment needs and prevents compaction over time.
Solution Approach 2:
The device is divided into distinct functional segments: a control ring at the proximal end that remains collapsed and fixed, and a tubular structure at the distal end that expands within the aneurysm. This segmentation allows each portion to perform its specific function independently, with the control ring providing stability and the expanded portion providing occlusion.
2Reliability
If the occlusion device is expanded within the aneurysm, then effective occlusion is achieved, but the device cannot be repositioned or retrieved
Solution Approach 1:
The device maintains dynamic controllability through the control ring, which remains in a collapsed state and can be manipulated by the delivery system. This allows the operator to reposition or retrieve the device by manipulating the control ring, while the distal portion remains expanded for occlusion, providing both effectiveness and operability.
3Reliability
If the device structure is made expandable for effective occlusion, then occlusion effectiveness improves, but the device complexity increases
Solution Approach 1:
The device structure is segmented into a simple control ring and an expandable tubular portion. This segmentation allows the complex expandable function to be isolated to only the portion needed for occlusion, while the control ring remains simple for manipulation and control, reducing overall system complexity while maintaining effectiveness.
Data Source
AI summary
An occlusion device suitable for endovasculature treatment of an aneurysm in a blood vessel in a patient, including a substantially tubular structure having a proximal end region and a distal end region, having a first, expanded condition and a second, collapsed condition. The device has dimensions in the second, collapsed condition suitable for insertion through vasculature of the patient and through a neck of the aneurysm. The device further includes a control ring having a substantially annular body disposed on the proximal end region of the structure and at least substantially circumscribing the proximal end region to prevent radial expansion of the proximal end region and to provide an engagement feature during manipulation of the occlusion device.