Artificial Heart Valve Implantation via Guide Wire Track
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Solution Overview
Problem
Existing methods for implanting artificial heart valves often result in the tie rope passing through gaps between chordae tendineae, leading to potential perivalvular leakage and damage to these structures, which are crucial for heart function and can cause cardiac issues like souffle, arrhythmia, and chest pain.
Innovation Solution
An implantation method involving a balloon catheter that avoids chordae tendineae, using a guide wire and guide wire catcher to create a track for the artificial heart valve, allowing it to be placed horizontally at the mitral valve opening with reduced risk of leakage and chordae tendineae damage, and securing the valve with a tie rope that is tightened to prevent displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tie rope is passed through the gaps between chordae tendineae during implantation, then the artificial heart valve can be secured in place, but it causes damage to the chordae tendineae and increases the risk of perivalvular leakage
Solution Approach 1:
The fixation system is divided into two independent parts: the artificial heart valve remains at the mitral valve opening while the tie rope is routed through a separate subcutaneous tunnel to the cardiac apex. This segmentation prevents the tie rope from passing through the chordae tendineae gaps, eliminating damage to these structures while maintaining secure fixation of the valve.
Solution Approach 2:
A subcutaneous tunnel acts as an intermediary pathway for the tie rope, providing an alternative route that bypasses the chordae tendineae. The tie rope is guided through this external tunnel and anchored at the cardiac apex, serving as a mediator that enables secure fixation without direct contact with and damage to the delicate chordae tendineae structures.
2Reliability
If traditional valve replacement surgery is performed with extracorporeal circulation, then complete valve replacement can be achieved, but the operation complexity and medical accident risk increase significantly
Solution Approach 1:
The complex extracorporeal circulation system and heart stopping procedures are extracted and removed from the implantation process. The invention enables valve replacement through a simpler catheter-based approach where the artificial heart valve is delivered via catheter and fixed using the subcutaneous tunnel method, eliminating the need for complex life-support systems and reducing operational complexity.
Solution Approach 2:
The implantation approach transitions from open-heart surgery requiring complete cardiac arrest to a percutaneous catheter-based procedure. This parameter change in the surgical approach reduces the complexity of equipment needed, decreases the duration of extracorporeal circulation, and lowers the overall medical accident risk while maintaining effective valve replacement.
Data Source
AI summary
The present application provides an implantation method of an artificial heart valve. The implantation method can include forming an incision in the left chest to expose the ventricle; advancing a guide wire kept away from chordae tendineaes through the atrium into the ventricle; advancing a guide wire catcher into the ventricle from the incision to pull out the distal end of the guide wire from the ventricle; and advancing the artificial heart valve into the ventricle from the distal end of the guide wire with a valve deliverer, and placing the artificial heart valve at a primary valve between the ventricle and the atrium along the guide wire. The artificial heart valve may avoid the chordae tendineaes in the heart system through the guide wire track during implantation.