Multi-Planar Embolization Coil for Stable and Compliant Packing
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Solution Overview
Problem
Existing embolization coils face challenges in achieving both stable basket formation and compliant packing due to their three-dimensional structures, which are difficult to compress and poorly compliant, making them unsuitable for aneurysms of various shapes and sizes.
Innovation Solution
A coil formed by joining at least four structural elements in different planes, including C-shaped, O-shaped, and Ω-shaped elements, arranged to form S-shaped structures with specific angles and proportions, allowing for high deflectability and compressibility, along with multiple coils that can be swiveled for enhanced stability and compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If three-dimensional structures with simple figure-eight, O, or Ω-shaped coils are used, then stable basket formation is achieved, but compliant packing is poor making the coils unsuitable for different aneurysm shapes and sizes
Solution Approach 1:
The coil is divided into multiple structural elements (first structural element, second structural element, third structural element, etc.) arranged in different planes. Each element can be configured with specific shapes (C-shaped, O-shaped, Ω-shaped) and can be independently adjusted to achieve both stability and compliance for different aneurysm geometries
Solution Approach 2:
The patent transitions from traditional two-dimensional or simple three-dimensional coil structures to a multi-planar three-dimensional configuration. Structural elements are arranged in multiple planes with specific spatial relationships, enabling the coil to adapt to complex aneurysm shapes while maintaining structural integrity
2Strength
If three-dimensional structures with simple figure-eight, O, or Ω-shaped coils are used, then structural support is provided, but the coils are difficult to compress and poorly compliant
Solution Approach 1:
Different structural elements are assigned different local properties and configurations. For example, C-shaped elements may provide flexibility and compliance in certain regions, while O-shaped or Ω-shaped elements provide structural support in other regions. The angle between planes and the specific geometry of each element can be optimized for its local function
Solution Approach 2:
The multi-planar structural elements are designed to be dynamically adjustable during deployment. The coil can transition from a compressed delivery state to an expanded functional state, with each structural element contributing to the overall deformability and adaptability required for successful embolization
Data Source
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AI summary
An embolization device and a coil thereof (10, 20, 30) are disclosed. The coil (10, 20, 30) is formed by joining together at least four structural elements arranged in different planes, which include at least two C-shaped elements (12) and at least one O-shaped element (13) or Ω-shaped (11) element. The at least two C-shaped elements (12) are arranged in two adjacent planes and are sequentially joined together to form an S-shaped structure. The embolization device preferably includes plurality of coils (10, 20, 30) which are joined together side-by-side and end-to-end, wherein in any adjacent two coils (10, 20, 30), one is swivelable about an axis of the embolization device with respect to the other. The Ω-shaped element is structurally stable, allowing the coil (10, 20, 30) to maintain good structural stability. At the same time, the three-dimensional S-shaped structure has good deflectability, which imparts high compliance to the coil (10, 20, 30). With this construction, the coil (10, 20, 30) can satisfy the requirements of both stable basket formation and compliant packing and can adapt to various aneurysms of different shapes and sizes with a dense packing effect.