Branch Stent Insertion Guide Rod for Single-Step Bifurcation Expansion
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Solution Overview
Problem
Current stent placement methods for vascular or non-vascular bifurcations are complex, requiring multiple steps and operations to insert and expand branch stents, making it difficult to achieve successful expansion in Y-shaped bifurcations within the human body.
Innovation Solution
An apparatus comprising an insert tube with multiple insertion guide rods and stent inserting parts that allow for the automatic expansion of a branch stent in a single operation by deviating the guide rods from the insert tube into the branch ducts, enabling simultaneous expansion of the main and branch stents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple separate operations are used to insert and expand branch stents in vascular bifurcations, then the stent placement can be performed with standard equipment, but the operation process becomes complicated and time-consuming
Solution Approach 1:
The patent combines multiple separate operations (insertion of branch catheter, insertion of stent expansion wire, division of joint, and removal of catheter) into a single integrated operation using a guide rod system. The guide rod simultaneously performs insertion guidance and stent expansion functions, eliminating the need for separate catheter and wire operations, thus simplifying the overall procedure and reducing time loss.
Solution Approach 2:
The guide rod serves multiple functions: it guides the insertion of the branch stent, supports the stent during delivery, and enables stent expansion upon removal from the insert tube. This multi-functional design replaces the need for separate specialized devices for each step, reducing operational complexity and procedural time.
2Reliability
If a branch catheter with joint is used for automatic expansion, then stent expansion can be achieved, but the operation process becomes complicated requiring multiple steps
Solution Approach 1:
The patent extracts and eliminates the complex joint mechanism from the apparatus. Instead of using a branch catheter with a joint that requires electrical signal activation, the guide rod system achieves stent expansion through simple mechanical removal of the guide rod from the insert tube, thereby maintaining reliable expansion while significantly reducing device complexity.
Solution Approach 2:
The guide rod acts as an intermediary element that simplifies the expansion mechanism. Rather than using a complex joint system requiring electrical signals, the guide rod's simple presence and removal provide sufficient mechanical force for stent expansion, reducing the overall system complexity while maintaining reliability.
3Ease of manufacture
If standard vessels or non-vessels are used for wire insertion, then the procedure can be performed with existing equipment, but the process requires multiple separate steps
Solution Approach 1:
The patent merges the functions of standard insertion equipment with the expansion function into a single guide rod system. While still using standard vessels or non-vessels for access, the integrated guide rod eliminates the need for separate catheter and wire insertion steps, thereby maintaining equipment compatibility while improving operational simplicity.
Data Source
AI summary
Provided herein are an apparatus and method for inserting a branch stent. A plurality of insertion guide rods for being delivered to a vascular or non-vascular bifurcation to which a stent expansion wire is connected are configured in an insert tube. In this way, a branch stent can be immediately delivered to the vascular or non-vascular bifurcation and expanded through just one operation so that an operation related to the branch stent is conveniently and promptly performed.