Kink-Resistant Catheter Guide Channel Assembly
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Solution Overview
Problem
Conventional medical device delivery systems face challenges with kinking and misalignment issues during the deployment of self-expanding devices like stents, leading to cumbersome procedures and potential complications.
Innovation Solution
A medical device delivery system featuring a flexible, kink-resistant design with an outer sheath and inner compression member, incorporating a transition region with a stepped profile for the inner and outer guide channel members to facilitate rapid insertion and deployment of self-expanding devices, reducing kinking and misalignment risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single-lumen catheter design is used, then the device structure is simple, but kinking and misalignment issues occur during deployment
Solution Approach 1:
The catheter is divided into multiple lumens (inner guide channel member and outer guide channel member) that are substantially aligned, allowing independent wire guide passage while maintaining structural integrity and preventing kinking during deployment
2Productivity
If rapid insertion of wire guide is required, then deployment speed increases, but misalignment between guide channels may occur
Solution Approach 1:
The inner and outer guide channel members are pre-aligned and positioned coaxially within the catheter body before deployment, ensuring that rapid insertion of the wire guide does not result in misalignment between the channels
Data Source
Figure 1
Figure 2
Figure 2A~2B
AI summary
Delivery systems for self-expanding devices are provided having a system proximal portion with a handle, an elongate middle section delivery device with an outer sheath and inner compression member, and a system distal portion including an outer guide channel member with first and second end portions defining a guide channel that slidably receives an inner guide channel member having a guide channel, the guide channels being substantially aligned. A mounting region for self-expanding devices is disposed radially between the inner and outer guide channel members. The outer guide channel member has a stepped profile from a first outer diameter to a second smaller outer diameter located near a transition region having a breech position opening for passage of a wire guide, catheter, or other medical instrument. The outer member is axially slideable relative to the inner member to deploy a self-expanding device. Methods of using and manufacturing are also provided.