Adjustable Stent Delivery Device for Bile Ducts
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Solution Overview
Problem
Conventional stents for bile ducts are prone to reflux, causing side effects and are difficult to adjust to fit individual bile duct lengths, leading to inaccurate procedures.
Innovation Solution
A stent delivery device with a protective case that is adjustable in length, featuring a movable sheath connector and control wire system, allowing precise stent deployment and minimizing side effects by accommodating varying bile duct lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional stents are used for bile ducts, then the stent insertion procedure can be performed, but the stent cannot be adjusted to fit individual bile duct lengths, leading to inaccurate procedures
Solution Approach 1:
The protective case is designed with adjustable length through a telescopic structure comprising an outer tube and an inner tube that can slide relative to each other. This dynamic adjustment mechanism allows the stent delivery device to be customized to match different bile duct lengths, thereby improving both adaptability and procedural accuracy
Solution Approach 2:
The length parameter of the protective case can be changed by extending or retracting the inner tube within the outer tube. This parameter adjustment enables the device to adapt to various bile duct lengths while maintaining precise control over stent placement accuracy
2Ease of operation
If conventional stents are used for bile ducts, then the stent insertion procedure can be performed, but food passing through the duodenum is frequently refluxed into the bile duct, causing side effects
Solution Approach 1:
The stent is pre-positioned within the protective case in a compressed state before insertion. The protective case prevents premature expansion and ensures the stent is deployed only at the correct location, thereby preventing reflux-related side effects while maintaining procedural simplicity
Solution Approach 2:
The protective case acts as an intermediary device that controls the stent's deployment. It allows the stent to be inserted through the duodenum without expanding, then prevents reflux by securing the stent in place before controlled expansion at the target site, thus eliminating harmful reflux effects
3Adaptability or versatility
If the protective case length is fixed, then the device structure is simple, but it cannot suit various body types of recipients
Solution Approach 1:
The protective case is segmented into an outer tube and an inner tube that can move independently. This segmentation allows the inner tube to extend or retract relative to the outer tube, providing length adjustability for different body types while keeping each individual tube component relatively simple in structure
Solution Approach 2:
The inner tube is nested within the outer tube, forming a telescopic structure. This nesting arrangement allows compact storage when retracted and extended length when needed, achieving adaptability to various body types without significantly increasing overall device complexity
Data Source
AI summary
The present disclosure relates to a stent delivery device comprising a protective case configured to have a certain length and have an inner space through which a guide wire passes, a mover configured to have an inner surface facing an outer surface of the protective case, be movable along the longitudinal direction of the protective case, and be penetrated at both ends, and a sheath connector configured to be connected to the mover to be linked to the mover, thereby being movable in the inner space of the protective case, through which the guide wire passes, and allow a control wire for contracting and expanding the stent connected to the guide wire to enter and exit.