Nested Dual-Lumen Catheter for Type III Aortic Arch Cannulation
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Solution Overview
Problem
Type III aortic arches pose challenges in cannulating the great vessels due to lack of backup support, leading to increased time and risk of thrombus prolapse during endovascular procedures, particularly in acute ischemic stroke scenarios where minimizing blockage clearance time is critical.
Innovation Solution
A catheter system comprising a first tubular structure with a guidewire lumen and a second tubular structure with a side port, allowing for simultaneous advancement and support of guidewires and catheters, enhancing navigation and stability within the aortic arch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional catheters are used in type III aortic arches, then the catheter can be introduced into the arterial system, but the catheter lacks backup support causing difficulty in cannulating great vessels and increasing procedure time
Solution Approach 1:
The catheter employs a nested dual-lumen structure where an inner tubular structure is positioned within an outer tubular structure. The inner structure provides backup support while the outer structure allows guidewire passage, enabling simultaneous support and navigation functions that resolve the cannulation difficulty in type III aortic arches.
Solution Approach 2:
The catheter is divided into functional segments: an outer tubular structure for guidewire access and an inner tubular structure for backup support. This segmentation allows each component to perform its specific function independently, improving ease of operation in challenging aortic arch configurations.
2Adaptability or versatility
If conventional catheters are used in type III aortic arches, then the catheter can navigate the aortic arch, but wire manipulations break thrombus loose creating dangerous emboli
Solution Approach 1:
The nested dual-lumen design allows the inner tubular structure to stabilize the guidewire while the outer structure provides navigation capability. This dual-function architecture reduces excessive wire manipulations in type III aortic arches, thereby minimizing thrombus disruption and emboli formation.
Solution Approach 2:
The inner tubular structure acts as an intermediary between the guidewire and the aortic arch vessel wall, providing backup support that prevents guidewire prolapse and reduces the need for aggressive wire manipulations that could dislodge thrombus.
3Reliability
If a dual-lumen catheter structure is implemented, then backup support and navigation are improved, but the device complexity increases
Solution Approach 1:
The nested configuration of inner and outer tubular structures provides backup support functionality while maintaining a relatively compact design. The inner structure fits within the outer structure, minimizing the overall footprint and facilitating delivery through standard access sites despite the enhanced reliability features.
Solution Approach 2:
The dual-lumen catheter structure performs multiple functions simultaneously: the outer lumen accommodates guidewire passage while the inner lumen provides backup support. This multi-functionality reduces the need for separate devices, thereby managing complexity while improving reliability.
Data Source
AI summary
The present disclosure provides a catheter comprising: (a) a first tubular structure defining a first lumen, the first tubular structure having a first end and a second end, wherein the first end of the first tubular structure comprises a first opening, and wherein the second end of the first tubular structure comprises a second opening, (b) a second tubular structure defining a second lumen, the second tubular structure having a first end and a second end, wherein the second end of the second tubular structure comprises a third opening, and (c) a fourth opening positioned in a sidewall of the second tubular structure between the first end of the second tubular structure and the second end of the second tubular structure, wherein a first portion of the first tubular structure extends beyond the fourth opening, and wherein the second tubular structure is positioned adjacent to a second portion of the first tubular structure.