Double-Lumen Introducer Catheter for Mitral Valve Guide Wire Navigation
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Solution Overview
Problem
Current transcatheter procedures for treating cardiac dysfunctions face challenges in precisely positioning guide wires around atrioventricular heart valves, especially the mitral valve, due to the presence of chordae tendineae, which complicates navigation and increases the risk of errors and procedural time.
Innovation Solution
A device with a double-lumen introducer catheter and adjustable guide catheters allows for precise navigation and positioning of guide wires around the mitral valve without penetrating the chordae tendineae, using a capture system to secure the distal ends and facilitate correct deployment of prosthetic systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional guide wire positioning methods are used in transcatheter procedures, then the procedure can be performed with standard equipment, but the navigation becomes complex and time-consuming due to the presence of chordae tendineae
Solution Approach 1:
The patent applies preliminary action by pre-positioning the guide catheter in the left ventricle before introducing the guide wire. The guide catheter is advanced through the aortic valve into the left ventricle and positioned with its distal end near the mitral valve annulus. This preliminary positioning creates a prepared pathway that facilitates subsequent guide wire insertion and navigation around the mitral valve, avoiding the need to navigate through chordae tendineae and reducing procedural time.
2Measurement precision
If guide wires are positioned without a capture system, then the deployment process is simpler, but the precision and reliability of guide wire positioning around the mitral valve decreases
Solution Approach 1:
The patent employs a capture system as an intermediary device to achieve precise guide wire positioning. The capture system includes a capture catheter with a capture basket that can be deployed in the left ventricle to grasp and secure the guide wire. This intermediary capture mechanism allows the operator to accurately position and stabilize the guide wire around the mitral valve annulus, ensuring the distal end is correctly positioned without penetrating chordae tendineae, while maintaining overall system manageability.
3Reliability
If conventional catheter navigation is used, then the equipment is simpler, but the reliability of the procedure decreases due to increased risk of errors from complex navigation
Solution Approach 1:
The patent applies the nesting principle by incorporating multiple catheters and devices within each other in a hierarchical structure. The guide wire is inserted through the guide catheter, which is positioned in the left ventricle. The capture catheter can be advanced over the guide wire, and the capture basket can be deployed from the capture catheter. This nested configuration allows for controlled, step-by-step deployment of each component, reducing navigation complexity and improving procedural reliability by maintaining a structured approach to positioning each element.
Data Source
AI summary
A prosthetic system for heart valve replacement comprises an annular support structure within which a valved prosthetic body can be expanded until it meets opposition. The annular support is provided in ring segments having terminal connectors for forming, in the condition of use of the prosthetic system, a stable and durable annular structural continuity capable of withstanding the opposition exerted by the valved prosthetic body. The prosthetic system is deployed using guide wires within a cardiac chamber guided through an introducer catheter having through lumens, within which at least two first guide catheters are positioned. These guide catheters have respective deflected or deflectable distal ends adapted to emerge from the distal end of the introducer catheter to convey and direct the distal ends of respective guide wires, placed within the guide catheters, towards a capture member of a capture system which is provided within the introducer catheter.