Multi-Directional Aneurysm Coil Segmentation
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Solution Overview
Problem
Traditional helical coils used for treating cerebral aneurysms are limited in their ability to deflect in multiple directions, leading to incomplete aneurysm packing, potential coil compaction, and the need for additional procedures.
Innovation Solution
The development of an occlusive coil with a novel helical tertiary structure that includes multiple deflection regions, allowing the coil to bend in different directions, thereby improving packing efficiency and reducing procedural complications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional helical coils are used with a single-direction deflection structure, then the coil structure is simple and easy to manufacture, but the coil cannot pack empty space in multiple directions leading to incomplete aneurysm packing
Solution Approach 1:
The coil is divided into multiple independent loops, each capable of deflecting in different directions. This segmentation allows each loop to independently pack empty space in its local region, achieving complete aneurysm packing while maintaining manufacturing simplicity through standardized loop construction
Solution Approach 2:
The coil structure transitions from single-direction deflection to multi-directional deflection by adding spatial dimensionality. The loops are configured to deflect in multiple directions simultaneously, enabling the coil to fill empty space in three-dimensional space rather than just along one axis
2Device complexity
If traditional helical coils are used with limited deflection capability, then the device complexity is low, but energy builds up along the coil causing catheter kick-out and coil herniation
Solution Approach 1:
By segmenting the coil into multiple loops, the structural complexity is distributed across independent units. Each loop can deflect independently to absorb energy, preventing energy buildup that would otherwise cause catheter kick-out and coil herniation
Solution Approach 2:
The coil structure is designed to be dynamic rather than rigid, with loops capable of deflecting in multiple directions. This dynamic behavior allows the coil to adapt to resistive forces during deployment, absorbing energy through controlled deflection rather than building it up
3Ease of manufacture
If traditional helical coils are used with single-direction bending, then the manufacturing process is simple, but empty space in other directions cannot be optimally packed leading to coil compaction
Solution Approach 1:
The coil is segmented into multiple loops that can independently deflect in different directions. This segmentation enables comprehensive packing of empty space in all spatial directions, improving packing stability without significantly complicating the manufacturing process
Solution Approach 2:
The coil structure incorporates variable geometric parameters across different loops, allowing each loop to be optimized for deflection in specific directions. This parameter variation enables multi-directional packing capability while maintaining manufacturing feasibility through controlled geometric 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 coil's ability to deflect in multiple directions enhances aneurysm packing volume, reduces the risk of coil compaction, and minimizes the likelihood of catheter kick-out and coil herniation, thus simplifying the treatment procedure.
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 comprising a coil having a proximal end, a distal end, and a longitudinal axis extending therebetween. The coil may be formed of an elongated member wound about the longitudinal axis of the coil in a series of contiguous loops, wherein each of the loops extend around the longitudinal axis between a first end and a second end. The second end may be disposed at generally the same angular position as the first end about to the longitudinal axis of the coil. The elongated member may undulate along its longitudinal axis between the first and second ends of at least some of the individual loops.