Trap Balloon Catheter Retainer for Guidewire Positioning
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Solution Overview
Problem
Current medical device systems face challenges in maintaining the position of a guidewire during catheter exchanges in intravascular procedures, particularly when using differently sized guide catheters, which complicates the process and requires multiple device configurations.
Innovation Solution
The introduction of a trap balloon catheter system that includes a catheter shaft with a balloon and a retainer mechanism, allowing the balloon to secure the guidewire within the guide catheter, and an adjustable retainer that can be positioned to accommodate various guide catheter lengths, ensuring the balloon remains within the catheter lumen during exchanges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a trap balloon catheter is used to secure the guidewire during catheter exchanges, then the guidewire position is maintained, but the device complexity increases due to the need for an adjustable retainer mechanism
Solution Approach 1:
The retainer is designed with a slidable member that can move along the catheter shaft to adjust the working length, allowing the same device to accommodate different guide catheter lengths. This dynamic adjustment capability maintains guidewire position reliability while avoiding the need for multiple fixed-configuration devices
Solution Approach 2:
The adjustable retainer mechanism enables a single trap balloon catheter design to work with multiple guide catheter sizes (e.g., 90 cm and 100 cm lengths). The slidable member can be positioned to provide different working lengths, making the device universal across different procedural configurations
2Productivity
If the trap balloon is positioned close to the distal end of the guide catheter, then the catheter exchange efficiency is improved, but the risk of the balloon extending beyond the guide catheter lumen increases
Solution Approach 1:
The retainer acts as an intermediary mechanism between the trap balloon and the guide catheter. It includes a slidable member with a stop that physically limits the distal position of the trap balloon, preventing it from extending beyond the guide catheter lumen while still allowing efficient positioning for catheter exchanges
3Adaptability or versatility
If multiple trap balloon catheters with different working lengths are used to accommodate different guide catheter sizes, then the adaptability is improved, but the device complexity and inventory requirements increase
Solution Approach 1:
Instead of maintaining multiple separate catheter designs, the invention creates a universal trap balloon catheter where the slidable member can be adjusted to provide different working lengths. This single multi-functional device replaces what would otherwise require multiple specialized devices, reducing inventory complexity while maintaining adaptability to different guide catheter lengths
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
This solution facilitates seamless catheter exchanges by maintaining guidewire position and compatibility with multiple guide catheter sizes, enhancing procedural efficiency and reducing the need for multiple device configurations.
Implementation Method 1
The balloon is inflated to secure the guidewire between the balloon and an inner surface of the guide catheter
Data Source
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AI summary
A medical device system 10 may include a guide catheter 11 having a proximal end, a distal end, and a lumen extending therebetween. The guide catheter designed to guide a therapeutic catheter 18 to a target site. A guidewire is disposed within the lumen of the guide catheter. The system also includes a trap balloon catheter 20 including a catheter shaft 22 and a balloon 24 coupled to the catheter shaft. The trap balloon catheter is designed to extend through the lumen of the guide catheter to a position adjacent to the distal end of the guide catheter. A trap balloon retainer 26 is coupled to the catheter shaft. The trap balloon retainer is designed to prevent a distal end of the trap balloon catheter from extending distally beyond the distal end of the guide catheter.