Balloon Stent Delivery with Single-Insertion Release Tube
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Solution Overview
Problem
Existing vascular stent implantation procedures require multiple insertions of microcatheters and balloon catheters, leading to complications and increased operation time.
Innovation Solution
A balloon stent installation device with a balloon dilatation catheter and a stent release tube, allowing a self-expandable stent to be delivered and installed with a single balloon catheter insertion, using a micro guidewire to guide the stent to the lesion site and a mechanism to withdraw the catheter while the stent expands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple insertions of microcatheter and balloon catheter are performed, then the stent can be delivered and expanded, but the operation time increases and complications occur
Solution Approach 1:
The patent combines the microcatheter and balloon catheter into a single integrated delivery system. The stent is delivered through the microcatheter to the lesion site, then the balloon catheter is expanded in place to deploy the stent, eliminating the need for separate insertion and withdrawal of multiple catheters. This merging of functions reduces operation time and minimizes complications associated with repeated instrument exchanges.
2Ease of manufacture
If multiple instrument exchanges are performed, then the stent delivery process can be completed, but the complexity of the procedure increases
Solution Approach 1:
The delivery system is designed as a multi-functional device that performs multiple operations: the microcatheter delivers the stent, the balloon catheter expands the stent, and both are withdrawn together as a single unit. This universal design allows one integrated device to perform functions that traditionally required separate instruments, thereby simplifying the overall procedure and reducing the number of steps the operator must manage.
3Productivity
If balloon catheter is withdrawn before stent release, then the stent can be delivered, but additional insertions are required
Solution Approach 1:
The stent is pre-loaded onto the microcatheter before the procedure begins, and the balloon catheter is pre-positioned around the stent within the delivery system. This preliminary preparation allows the operator to simply advance the entire assembly to the lesion site, expand the balloon to release the stent, and withdraw everything together, eliminating the need for additional insertions or complex sequencing of steps during the procedure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces operation steps and time, minimizes instrument exchanges, and enhances the success rate of vascular stent implantation by enabling a single catheter insertion for stent delivery and expansion.
Implementation Method 1
The self-expandable stent is elastically stretched out to stretch out the lesion site
Data Source
AI summary
Provided are a balloon stent installation device and a stent installation method. The balloon stent installation device, which is used to install a self-expandable stent to a lesion site of a blood vessel, includes a balloon dilatation catheter and a stent release tube. The balloon dilatation catheter includes a first through hole with an inlet and an outlet. An expansion part is disposed at a distal end of the balloon dilatation catheter. The self-expandable stent is slidably mounted in the first through hole and located at a distal end of the balloon dilatation catheter. The stent release tube is slidably disposed in the first through hole. A distal end of the stent release tube abuts against the self-expandable stent and includes a second through hole. A micro guidewire is configured to be inserted sequentially through the outlet of the first through hole, the self-expandable stent, and the second through hole.