Occluding Device Deployment via Friction and Pressure Control
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Solution Overview
Problem
Current methods for treating cerebral aneurysms, such as surgical clipping and stent deployment, face challenges in effectively occluding aneurysms and preventing occlusion material from escaping, while also requiring precise deployment and adjustment of occluding devices within the vasculature.
Innovation Solution
A system and method for deploying an occluding device within a vessel, featuring an introducer sheath and guidewire assembly with a flexible distal tip, allowing for adjustable deployment and expansion of the occluding device to form a barrier within the aneurysm, using friction and pressure to control the device's length and size, and retaining occlusion material like coils or viscous fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional stents are deployed to support the vessel, then vessel support is provided, but the stents cannot effectively prevent occlusion material from escaping the aneurysm
Solution Approach 1:
The occluding device is divided into multiple segments or sections along its length, with each section capable of independent expansion and material retention. This segmentation allows the device to create multiple barriers within the aneurysm, preventing material escape while maintaining overall structural integrity and avoiding the need for a completely new complex device design.
Solution Approach 2:
The occluding device incorporates nested structures where inner components are housed within outer components during delivery, and then sequentially deployed. This nesting approach allows the complex multi-functional device to be delivered through standard catheters while providing both vessel support and material retention capabilities without requiring entirely new delivery systems.
2Reliability
If the occluding device is deployed to form a barrier within the aneurysm, then material escape is prevented, but the device length and size cannot be adjusted during deployment
Solution Approach 1:
The occluding device incorporates dynamic components that allow for adjustment of device length and circumferential size after initial deployment. The friction between the device and catheter inner surface is utilized as a controllable mechanism, where varying friction forces enable the physician to adjust device dimensions in real-time during the procedure, optimizing the barrier function for material retention while maintaining adaptability.
Solution Approach 2:
The device allows for changing physical parameters such as length and circumferential size during deployment by manipulating friction forces and pressure applied to the device. This parameter adjustment capability enables the occluding device to adapt to different aneurysm geometries and sizes while maintaining effective material retention, without requiring multiple pre-fabricated device sizes.
3Adaptability or versatility
If friction is used to control device length during deployment, then device adjustment is enabled, but deployment precision becomes more difficult to control
Solution Approach 1:
The system incorporates feedback mechanisms that provide real-time information about device position, friction forces, and deployment status. This feedback allows the physician to monitor and control the friction-based adjustment process, maintaining deployment precision while enabling device length modification. The feedback loop ensures that adjustments are made within safe and effective parameters.
Solution Approach 2:
An intermediary mechanism or component is introduced between the physician's control inputs and the device deployment process. This intermediary translates manual manipulation into controlled friction-based adjustments, providing mechanical advantage and precision control. The intermediary acts as a mediator that maintains deployment accuracy while enabling adaptable length control during the procedure.
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
Enables effective occlusion of aneurysms by preventing material escape and allowing for precise adjustment and positioning of the occluding device, enhancing the safety and efficacy of aneurysm treatment by ensuring stable vessel support and material retention.
Implementation Method 1
the length of the occluding device can be adjusted in response to friction created between the occluding device and an inner surface of a catheter
Implementation Method 2
the deployed length and circumferential size of the occluding device can be changed as desired by the physician performing the procedure
Data Source
AI summary
A system and method for deploying an occluding device that can be used to remodel an aneurysm within the vessel by, for example, neck reconstruction or balloon remodeling. The system comprises an introducer sheath and an assembly for carrying the occluding device. The assembly includes an elongated flexible member having an occluding device retaining member for receiving a first end of the occluding device, a proximally positioned retaining member for engaging a second end of the occluding device and a support surrounding a portion of the elongated flexible member over which the occluding device can be positioned.