Axially Split Guide Catheter for Multi-Branch Stent Delivery
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Solution Overview
Problem
Current minimally invasive surgery techniques face challenges in safely and smoothly delivering multi-branch stents to lesion locations within branched blood vessels due to guide wire interference and difficulty in ensuring wires enter respective cavities without intertwining.
Innovation Solution
A guide catheter with axially split guide wire channels and a control guide wire channel, allowing for separate introduction and withdrawal of guide wires to prevent interference, facilitating the safe and smooth delivery of stent branches into branched blood vessel cavities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple guide wires are used to deliver multi-branch stents, then the stent branches can be delivered to respective locations, but the guide wires intertwine and interfere with each other during delivery
Solution Approach 1:
The guide catheter is divided into multiple independent guide wire channels, each channel being axially split to form a separate incision. This segmentation allows each guide wire to travel through its own dedicated pathway, preventing intertwining and interference between multiple guide wires during the delivery of multi-branch stents.
Solution Approach 2:
The axially split guide wire channels act as intermediary structures that mediate between the guide wires and the catheter body. The incisions formed by axial splitting allow guide wires to be selectively introduced and separated, providing a controlled interface that prevents direct interaction and interference between multiple guide wires.
2Productivity
If guide wires are introduced simultaneously through a traditional catheter, then delivery efficiency is improved, but guide wires cannot be controlled to enter respective branched blood vessel cavities without interference
Solution Approach 1:
The guide catheter structure is segmented into multiple independent guide wire channels with individual inlets and outlets. Each channel can be selectively opened or closed, allowing operators to control which guide wire enters which branched blood vessel cavity, thereby maintaining high delivery efficiency while achieving precise control over guide wire placement.
Solution Approach 2:
The guide wire channels are designed with dynamic control capabilities through axial splitting and incision formation, allowing the operator to adjust and control the state of each channel independently. This dynamic control enables selective introduction and separation of guide wires, ensuring each wire enters the correct branched blood vessel cavity while maintaining efficient delivery.
3Device complexity
If a single catheter structure is used for multi-branch delivery, then device complexity is reduced, but it cannot prevent guide wire interference and ensure smooth entry into branched cavities
Solution Approach 1:
While maintaining a single integrated catheter body, the structure is segmented into multiple independent guide wire channels with axial splits and incisions. This segmentation approach prevents guide wire interference and ensures reliable delivery safety without requiring multiple separate catheters, thus balancing structural simplicity with functional reliability.
Solution Approach 2:
Multiple guide wire channels are nested within the single catheter body structure, with each channel independently configured through axial splitting. This nesting arrangement allows the catheter to function as a unified device while containing separate, interference-free pathways for multiple guide wires, maintaining simplicity while ensuring delivery safety.
Data Source
Figure 1~1B
Figure 2~3A
Figure 4A~4C
AI summary
Disclosed are a guide catheter (8, 8') for a branched stent delivery system and the branched stent delivery system, the guide catheter (8, 8') being used for introducing guide wires (5, 6, 7) into corresponding cavities of a branched blood vessel in order that stent branches (10, 11, 12) of a branched stent (9) are subsequently dragged into their corresponding branched blood vessel cavities, characterized in that the guide catheter (8, 8') is provided with at least one guide wire channel extending axially for guiding the guide wires (5, 6, 7), in that each of the guide wire channels is provided with an inlet (a, b, c) and a corresponding outlet (d, e, f) for the guide wires, and in that the guide catheter (8, 8') is axially split between the inlet for the guide wire (a, b, c) and the outlet for the guide wire (d, e, f) of the respective guide wire channels to form incisions (30, 100, 100', 100"), via which the respective guide wires (5, 6, 7) can be separated from the guide catheter (8, 8').