Vascular Occluder with Crossing Frame Elements for Vessel Sealing
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Solution Overview
Problem
Conventional vascular occlusion devices face challenges such as variable occluding barrier length, recanalization, and migration within the vessel due to blood pressure and vessel size changes, leading to potential blood leakage and loss of occlusion seal.
Innovation Solution
A vascular occlusion device with first and second frame elements made of resilient material, coupled in a crossing relationship, and equipped with proximal and distal end covers that expand radially under fluid pressure to enhance fit and seal within the vessel, reducing migration risks and accommodating various vessel sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wire coils are implanted to effect vascular occlusion, then occlusion can be achieved, but the procedure takes time to reach adequate occlusion and the length of the occluding barrier varies depending on the number of coils implanted
Solution Approach 1:
The device is divided into multiple expandable cells arranged in series along the longitudinal axis, allowing the occluding barrier to be formed in discrete segments that can be independently controlled, thereby reducing the time required to achieve adequate occlusion compared to sequential coil implantation
Solution Approach 2:
The device allows for adjustment of the occluding barrier length by controlling the expansion parameters of individual cells, enabling the clinician to achieve adequate occlusion more quickly by expanding the necessary number of cells rather than implanting multiple coils
2Reliability
If multiple coils are implanted to achieve adequate occlusion, then occlusion effectiveness improves, but the length of the occluding barrier becomes variable and may not be suitable for limited vascular space
Solution Approach 1:
The device features dynamically adjustable occluding barrier length through selective expansion of cells, allowing the barrier to be optimized for the specific vascular space available rather than being fixed by the number of coils implanted
Solution Approach 2:
The expansion parameters of individual cells can be controlled to adjust the length of the occluding barrier, providing adaptability to different vessel sizes and limited vascular spaces while maintaining adequate occlusion effectiveness
3Reliability
If conventional occlusion devices are used, then occlusion can be achieved, but recanalization occurs leading to leakage through the occluding barrier and reopening of the vessel
Solution Approach 1:
The device promotes preliminary thrombus formation within the expandable cells before full occlusion is achieved, creating an initial barrier that prevents recanalization and maintains the occlusion seal over time
Solution Approach 2:
The device maintains continuous occlusion pressure through the expandable cell structure and integrated thrombogenic elements, preventing leakage and recanalization by continuously reinforcing the occlusion barrier rather than relying on static coil structures
4Reliability
If occlusion devices are implanted in vessels, then vascular occlusion is achieved, but migration occurs within the vessel due to blood pressure and vessel size changes, resulting in loss of occlusion seal
Solution Approach 1:
The expandable cell structure provides dynamic adaptation to vessel size changes, maintaining the occlusion seal and preventing migration by adjusting to physiological variations in vessel dimensions
Solution Approach 2:
The device can adjust its expansion parameters in response to blood pressure and vessel size changes, maintaining stable positioning and occlusion seal rather than being displaced by physiological variations
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 provides a reliable and secure occlusion by expanding to fit various vessel sizes, minimizing migration and blood leakage, and creating additional occlusion barriers through blood stagnation and coagulation within its chambers.
Implementation Method 1
first and second frame elements made of a resilient material, the first and second frame elements being coupled to one another in crossing relationship
Implementation Method 2
expanding to fit various vessel sizes, minimizing migration and blood leakage
Implementation Method 3
creating additional occlusion barriers through blood stagnation and coagulation within its chambers
Data Source
AI summary
An occlusion device includes first and second crossing frame elements each of annular ring-shape, as well as first and second annular support elements connected to respective extremities of the crossing frame elements. The frame and support elements are provided with covers made of a substantially impervious material. The occluder may include a covering sleeve of stretchable material. The occluder substantially stops or reduces the flow of blood therethrough, creating blood statis and subsequent occlusion by clot formation within the occluder. The structure of the frame elements ensures good edge sealing and enhanced fixation of the occluder in a vessel as blood pressure impinges upon the covers of the occluder.