Endoprosthesis Deployment Device with Segmented Insulating Ducts
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Solution Overview
Problem
Existing devices for deploying endoprostheses in blood vessels face reliability issues due to entanglement of filamentary lines and surgical guides during insertion, affecting precise positioning and deployment.
Innovation Solution
The device incorporates internal insulating ducts within the prop to guide and isolate filamentary lines, preventing entanglement and enhancing reliability by providing a channel for each line between the prop's openings, with beveled ends and collars for secure fixation, allowing independent control and reduced mechanical interaction with the guide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If filamentary lines are used to retain the endoprosthesis on the prop, then the endoprosthesis can be securely held and deployed, but the lines may become entangled with the surgical guide during insertion, reducing reliability
Solution Approach 1:
The internal passage of the prop is segmented into multiple separate channels, with each channel dedicated to a specific filamentary line. This segmentation physically isolates each line from others and from the surgical guide, preventing entanglement while maintaining secure retention of the endoprosthesis through independent line control.
Solution Approach 2:
The patent introduces an intermediary structure (the divided internal passage with separate channels) between the filamentary lines and the surgical guide. This intermediary arrangement allows the lines to perform their retention function while being shielded from harmful interactions with the guide during insertion and deployment.
2Adaptability or versatility
If multiple filamentary lines are used for retention, then independent control of endoprosthesis deployment is achieved, but the complexity of managing multiple lines increases operational difficulty
Solution Approach 1:
The internal passage is divided into separate channels, with each channel containing and guiding a specific filamentary line. This segmentation allows each line to be controlled independently for selective deployment of endoprosthesis segments, while the structured channel arrangement simplifies line management by preventing tangling and providing clear pathways for each control line.
Data Source
AI summary
A device includes an expandable implant and a hollow stent internally defining a central passage. The hollow stent defines a retention opening of the implant near the distal end thereof. The inventive device also includes a wire-type link for releasably fixing the implant to the stent, which has a traction section introduced into the opening and extending inside the central passage. For the wire-type link, the device includes an internal insulation channel arranged in the central passage and axially fixed with respect to the stent. The insulation channel receives only one wire-type link and defines a channel which is devoid of a link at least between the proximal end of the stent and the retention opening and is placed in the central channel.