Aneurysm Neck Cover Mesh for Coil Stability Without Flow Occlusion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing treatments for aneurysms, particularly in wide-necked aneurysms, risk vascular occlusions due to blood flow interruption and coil migration, which can lead to underperfusion and vessel occlusion during coil placement procedures.
Innovation Solution
A medical set comprising a main catheter and a covering device with a self-expanding mesh structure, featuring a longitudinally permeable design and an electrospun cover, allows for blood flow while preventing coil migration and aneurysm inflow, using a material like nitinol or polyurethane, ensuring flexibility and compressibility for small vessel access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a balloon is used to occlude the aneurysm neck during coil placement, then coil migration is prevented, but blood flow is completely interrupted causing underperfusion risk
Solution Approach 1:
The device segments the occlusion function: the porous cover provides partial occlusion to prevent coil migration while the open distal end maintains blood flow through the vessel, eliminating the all-or-nothing occlusion of traditional balloons
Solution Approach 2:
The cover is made with a porous structure that allows blood to pass through while still providing a barrier to coil migration, enabling simultaneous coil containment and blood flow maintenance
2Ease of operation
If the balloon is deflated to allow catheter withdrawal, then catheter access is restored, but coils may shift causing vessel occlusion
Solution Approach 1:
The cover is deployed and secured to the vessel wall before coil placement begins, creating a stable platform that maintains coil position even when the delivery catheter is withdrawn or exchanged
Solution Approach 2:
The cover acts as an intermediary structure between the vessel wall and the coils, providing a stable base that prevents coil migration independently of the delivery catheter
3Reliability
If a covered stent is used to seal the aneurysm, then blood flow into the aneurysm is prevented, but blood flow through the vessel is completely blocked
Solution Approach 1:
The cover is applied locally at the aneurysm neck rather than along the entire vessel, providing targeted sealing where needed while leaving the distal vessel open for blood flow
Solution Approach 2:
The cover is positioned in the radial dimension to seal the aneurysm opening while the longitudinal dimension remains open, creating selective occlusion in one dimension while maintaining flow in another
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 solution minimizes the risk of vascular occlusions by maintaining blood flow and nutrient supply, enabling precise coil placement and effective aneurysm sealing, while being suitable for small and tortuous cerebral vessels.
Implementation Method 1
The lattice structure has at least one cell ring comprising between three and six cells
Implementation Method 2
electrospun cover
Data Source
Figure 1~3
Figure 4~5
Figure 6
AI summary
The invention relates to a medical kit (2) for the treatment of aneurysms (4), comprising a main catheter (8), a cover device (12) for temporarily covering an aneurysm (4), which cover device can be moved through the main catheter (8) to a place of treatment (10). The cover device (12) comprises a self-expanding lattice structure (14) that has a cylindrical portion (16), open at a distal end (18) and at least partially provided with a cover (20), and a funnel-type portion (22) that is permanently connected to a transport wire (26), movable inside the main catheter (8), and a total lateral area (27) of which is not covered so that when the lattice structure (14) is expanded, blood can flow through it in the direction of its longitudinal axis. The invention further relates to a medical system.