Occluder Devices With Radially Expandable Barrier And Collapsible Tail
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Solution Overview
Problem
Current occluding devices for treating vascular malformations and conditions like aneurysms and tumors often fail to provide rapid and efficient sealing of blood vessels, leading to incomplete occlusion and potential further damage.
Innovation Solution
An occlusion system featuring a delivery catheter with a radially enlargeable barrier member and a collapsible tail portion, which includes an anchor feature and can be self-expanding or balloon-expandable, allowing for secure deployment and sealing within body lumens, with the tail portion designed to collapse under pressure for effective fluid occlusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional occluding devices (coils, balloons, foam, plugs) are used to block malformed vessels, then blood supply to affected areas is cut off, but the occlusion is not rapid or efficient enough, leading to incomplete sealing and potential further damage
Solution Approach 1:
The barrier member transitions from a compressed delivery state to an expanded occlusive state dynamically upon deployment. The device is delivered in a low-profile compressed configuration through the catheter and then expanded radially to engage the vessel wall and barrier member, creating rapid and effective occlusion. This dynamic transformation allows the device to achieve both rapid deployment and reliable sealing.
Solution Approach 2:
The occlusion device is divided into distinct functional segments: a delivery catheter for navigation, a barrier member for sealing, and an anchor feature for securing. This segmentation allows each component to be optimized for its specific function while working together to achieve rapid and reliable occlusion.
2Adaptability or versatility
If a single occlusion device is used to treat various body passages, then device versatility is improved, but the device must accommodate different anatomical variations and conditions
Solution Approach 1:
The occlusion device is designed with universal applicability to treat various body passages including vessels, airways, and other lumens. The barrier member can be delivered through catheters of different sizes and deployed in various anatomical locations. The device maintains structural simplicity while achieving multi-functionality through its expandable barrier mechanism that adapts to different vessel diameters and anatomical configurations.
3Reliability
If the barrier member is made radially enlargeable for secure anchoring, then occlusion reliability is improved, but the device profile during delivery increases
Solution Approach 1:
The barrier member is nested within the delivery catheter in a compressed state during delivery, minimizing the delivery profile. Upon deployment, the barrier member expands radially outward from the catheter to its full occlusive diameter. This nesting arrangement allows the device to maintain a small delivery profile while achieving large expanded dimensions for effective occlusion and secure anchoring.
Solution Approach 2:
The barrier member transitions dynamically from a low-profile compressed state during delivery to a high-profile expanded state during occlusion. This dynamic size transformation is achieved through the expandable structure that can be compressed for navigation and then expanded for function, resolving the contradiction between delivery profile and anchoring reliability.
4Reliability
If the tail portion is designed to collapse under blood pressure for sealing, then occlusion effectiveness is improved, but the structural complexity of the device increases
Solution Approach 1:
The tail portion of the barrier member is designed to collapse automatically under the force of blood pressure without requiring additional actuation mechanisms. The hydrodynamic force of flowing blood causes the tail portion to fold or collapse against the vessel wall, creating an effective seal. This self-service mechanism achieves reliable sealing while maintaining structural simplicity.
Solution Approach 2:
The device converts the potentially harmful force of high blood pressure into a beneficial sealing mechanism. The blood pressure that could potentially dislodge or fail to occlude the device instead causes the tail portion to collapse and seal more effectively against the vessel wall, transforming a challenge into an advantage.
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 system enables rapid, secure, and reliable occlusion of body lumens, reducing the need for multiple devices and procedures, while allowing guidewire access and maintaining sealing even under high blood pressure, thus effectively preventing fluid flow and treating a wide range of body passages with a single device.
Implementation Method 1
a radially enlargeable barrier member... self-expanding or balloon-expandable
Implementation Method 2
the tail portion designed to collapse under pressure for effective fluid occlusion... maintaining sealing even under high blood pressure
Implementation Method 3
an anchor feature and can be self-expanding or balloon-expandable, allowing for secure deployment
Data Source
AI summary
Various aspects of the present disclosure are directed toward systems, methods, and apparatuses that include an occlusion device having a barrier member. The barrier member may include an enlargeable portion and a tail portion extending from the enlargeable portion. The enlargeable portion and the tail portion are releasably coupled to the delivery catheter such that the tail portion is radially unsupported and collapsible upon deployment.