Biliary Stent Deployment Tube with Breachable Guidewire Segment
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Solution Overview
Problem
Current methods for deploying biliary stents often require manipulation of guidewires, which can lead to fracturing or adverse physical impacts on the subject, necessitating a reliable method and device for deployment without guidewire manipulation.
Innovation Solution
A stent-deployment assembly comprising a biliary stent and an elongated stent-conveyance tube with a guidewire-retaining segment featuring distal and proximal apertures and a laterally breachable portion, allowing the stent to be advanced along a guidewire and deployed without longitudinal guidewire displacement by breaching the guidewire-retaining segment upon proximal withdrawal of the stent-conveyance tube.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guidewire manipulation is used to deploy biliary stents, then the stent can be positioned and deployed, but the guidewire may fracture or cause adverse physical impacts on the subject
Solution Approach 1:
The catheter is divided into distinct functional segments: a guidewire engagement portion with an opening for receiving the guidewire, and a stent delivery portion for stent deployment. This segmentation allows the guidewire to be engaged and manipulated without requiring direct manipulation of the guidewire itself during deployment, reducing fracture risk while maintaining ease of use
Solution Approach 2:
The catheter acts as an intermediary device between the guidewire and the stent deployment process. The guidewire engagement portion receives and secures the guidewire, while the stent delivery portion uses this engagement to deploy the stent without requiring direct guidewire manipulation, thus protecting the guidewire from fracture
2Ease of operation
If the guidewire must be manipulated for stent deployment, then deployment can be achieved, but the risk of guidewire fracture and adverse effects increases
Solution Approach 1:
The guidewire is engaged and secured in the guidewire engagement portion before the stent deployment process begins. This preliminary engagement establishes a secure connection that allows subsequent deployment actions to be performed on the catheter itself rather than on the guidewire, preventing fracture during manipulation
Solution Approach 2:
The function of guidewire manipulation is extracted from the deployment process. Instead of manipulating the guidewire directly to deploy the stent, the catheter is designed to perform the deployment function through its stent delivery portion while the guidewire remains passively engaged, removing the harmful manipulation element
Data Source
AI summary
A stent-deployment assembly for use with a guidewire comprises a biliary stent and an elongated stent-conveyance tube comprising a guidewire-retaining segment that includes respective distal and proximal apertures defining a guidewire-path therethrough, and a lengthways laterally-breachable portion. In a stent-advancement configuration, the guidewire passes through the respective apertures so as to interiorly traverse the guidewire-retaining segment, and the stent is arranged to surround a stent-conveyance tube segment that is proximally displaced from the guidewire-retaining segment, for advancement of the stent together with the stent-conveyance tube along the guidewire into a body lumen of a human subject. When the stent is disposed, in the stent-advancement configuration, at a target deployment location within the lumen, a proximal-direction withdrawal of the stent-conveyance tube is effective to cause the guidewire to breach the laterally-breachable portion of the guidewire-retaining segment so as to decouple the guidewire from the tube without longitudinal displacement of the guidewire.