Telescopic Capsule for Curved Path Implant Delivery
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Solution Overview
Problem
Current implant delivery tube assemblies with high rigidity and length face challenges in delivering and withdrawing implants stably through curved paths, leading to inaccurate positioning and potential damage to vascular cavities due to their inflexible design.
Innovation Solution
A telescopic implant delivery tube assembly with a capsule composed of multiple segments that can extend and retract, allowing for flexible movement and reduced space occupation during implant release and withdrawal, enhancing accuracy and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the capsule has high rigidity and great length to bear outwardly expanding radial force and ensure stability, then the bearing capacity and stability are improved, but the turning radius increases and the delivery tube assembly cannot perform delivery and withdrawal operations in curved paths
Solution Approach 1:
The capsule is divided into multiple capsule segments (first capsule segment, second capsule segment, etc.) that can relatively move with respect to each other. This segmentation allows the capsule to bend and adapt to curved paths during delivery while maintaining structural integrity and stability when needed, resolving the contradiction between stability and maneuverability.
Solution Approach 2:
The capsule segments are designed to be movable relative to each other, transforming the capsule from a rigid static structure to a dynamic flexible structure. This enables the capsule to change its shape and curvature radius according to the delivery path requirements, allowing both stable delivery and curved path navigation.
2Strength
If the capsule has high rigidity to bear radial force during valve release, then the bearing capacity is improved, but the capsule cannot be retracted sufficiently during withdrawal operation
Solution Approach 1:
The capsule is segmented into multiple sections that can independently retract. During withdrawal, the capsule segments can be retracted to different degrees, allowing sufficient retraction length while maintaining the structural integrity needed to bear radial forces during the valve release phase.
Solution Approach 2:
The capsule segments are arranged in a nested configuration where inner segments are housed within outer segments. This nesting structure allows the capsule to achieve compact retraction during withdrawal while maintaining the expanded configuration needed for radial force bearing during valve release, effectively resolving the length contradiction.
3Measurement precision
If the inner tube is in bending-controlled state to achieve positioning, then the positioning accuracy is improved, but the inner tube exhibits high rigidity and cannot be withdrawn in curved path
Solution Approach 1:
The inner tube is divided into multiple inner tube segments that can relatively move with respect to each other. This segmentation allows the inner tube to maintain its bending-controlled positioning state for accurate implant release while enabling flexible withdrawal through curved paths by allowing the segments to adapt to the withdrawal trajectory.
Solution Approach 2:
The inner tube segments are designed to be movable relative to each other, transforming the inner tube from a rigid structure to a dynamic one that can adapt to different operational states. During positioning, the inner tube maintains its bent configuration for accuracy, while during withdrawal, the segments can move to allow curved path navigation.
Data Source
AI summary
An implant delivery tube fitting (12) and an implant delivery system. The implant delivery tube fitting (12) is used for loading and delivering an implant, and the implant delivery tube fitting (12) comprises, sequentially from a proximal end to a distal end, an outer tube (122) and a capsule (121). The inner lumen of the capsule (121) is adapted to receive an implant, and the capsule (121) is provided at the distal end of the outer tube (122). The capsule (121) has a telescopic structure, and the outer tube (122) can drive the capsule (121) to make a telescopic movement so that the capsule (121) is lengthened or shortened.