Aneurysm Occlusion Coil With Multi-Directional Deflection Regions
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Solution Overview
Problem
Conventional occlusive coils for treating cerebral aneurysms can only deflect in one direction, leading to energy buildup during deployment, potential catheter kick-out, incomplete aneurysm packing, and increased risk of coil compaction, which complicates procedures and may require additional treatments.
Innovation Solution
The development of occlusive coils with a novel helical tertiary structure that includes multiple deflection regions, allowing the coil to bend in various directions, reducing energy buildup and improving packing efficiency within the aneurysm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional helical coils are used, then the coil structure is simple and easy to manufacture, but the coil can only deflect in one direction causing energy buildup and potential catheter kick-out
Solution Approach 1:
The coil is divided into multiple independent deflection regions along its longitudinal axis, where each region can deflect in different directions. This segmentation allows the coil to adapt to multi-directional resistive forces during deployment while maintaining overall structural integrity through the continuous wire formation.
Solution Approach 2:
The coil structure transitions from a simple one-dimensional helical form to a three-dimensional configuration with multiple deflection regions capable of bending in various directions. This dimensional complexity enables the coil to pack efficiently into aneurysm cavities of different shapes and sizes.
2Manufacturing precision
If conventional helical coils are used, then the manufacturing process is straightforward, but the coil cannot optimally pack empty space in all directions leading to incomplete aneurysm packing
Solution Approach 1:
The coil structure incorporates multiple discrete deflection regions that can independently adjust their orientation to fill empty spaces in different directions within the aneurysm cavity, achieving more complete packing while maintaining a relatively simple manufacturing process.
Solution Approach 2:
The coil's geometric parameters, including the orientation and spacing of deflection regions, are optimized to enable efficient packing in multiple directions. These parameter adjustments allow the coil to adapt to various aneurysm geometries without significantly complicating the manufacturing process.
3Reliability
If conventional helical coils are used, then the coil structure is straightforward, but energy builds up along the coil during deployment causing sudden release that may kick the microcatheter out of position
Solution Approach 1:
By segmenting the coil into multiple deflection regions, the structure can distribute and dissipate resistive forces during deployment more evenly, preventing excessive energy buildup that would cause sudden release and catheter kick-out. Each segment can deflect independently to accommodate forces along the coil's path.
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 coils with multiple deflection regions reduce the risk of catheter kick-out, enhance aneurysm packing volume, and decrease the likelihood of retreatment due to coil compaction, thereby simplifying the treatment process and improving patient outcomes.
Implementation Method 1
the elongated member undulates along its longitudinal axis between the first and second ends of at least some of the individual loops
Data Source
AI summary
Devices, systems, and methods for treating vascular defects are disclosed herein. One aspect of the present technology, for example, is directed toward an occlusive device having a distal end, a proximal end, and a longitudinal axis extending therebetween. The occlusive device may comprise an elongated member wound about the longitudinal axis to form a series of loops, wherein along at least some of the loops, the elongated member includes a first peak and a second peak axially offset from the first peak, the first peak being axially between the second peak and the proximal end. The first peak may be convex towards the distal end, and the second peak may be convex towards the proximal end.