Segmented Winding Mandrel for Vasoocclusive Coil Versatility
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Solution Overview
Problem
Existing mandrels for forming vasoocclusive coils lack the versatility to create a variety of winding patterns and transitions between coil portions, particularly for longer framing coils and those with more than six loops.
Innovation Solution
A winding mandrel with a pair of generally rounded-cube shaped or orthogonally flat-sided spherical main bodies connected by a central transition post, featuring ten to twelve cylindrical posts aligned with orthogonal axes, allowing for diverse winding patterns and short transitions between coil portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single main body mandrel with six cylindrical posts is used, then the structure is simple and easy to manufacture, but the versatility for creating different winding patterns and coil shapes is limited
Solution Approach 1:
The mandrel is divided into two separate main bodies, each capable of independent use for different winding patterns. This segmentation allows the device to create a variety of coil shapes and transitions without requiring a single complex monolithic structure, resolving the contradiction between versatility and complexity.
Solution Approach 2:
Each main body of the mandrel is designed with multiple cylindrical posts arranged in orthogonal configurations, allowing either main body to serve multiple winding functions. This multi-functionality enables the mandrel system to create diverse vasoocclusive coil shapes while maintaining relatively simple individual component structures.
2Adaptability or versatility
If more cylindrical posts are added to the mandrel, then more winding patterns and coil transitions can be created, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
Instead of adding numerous posts to a single complex main body, the design segments the posts into two separate main bodies with fewer posts each. This reduces the manufacturing complexity of individual components while collectively providing the versatility needed for various winding patterns.
Solution Approach 2:
The solution moves from a single main body to two main bodies connected by a transition post, adding a spatial dimension to the mandrel structure. This dimensional change allows for diverse winding patterns without requiring an excessive number of posts on any single component.
Data Source
AI summary
The winding mandrel includes a pair of generally rounded-cube shaped or orthogonally flat-sided spherical main bodies connected together and having a plurality of cylindrical posts for forming vasoocclusive coils. The main bodies are connected together by a transition post, and the posts of the two main bodies are typically offset. A front end post and back end post are disposed on the front and rear ends of the mandrel. A short winding post member may be added between the connections of the two main bodies to provide additional winding posts.