Mitral Suturing Catheter with Catch Needles for Percutaneous Repair
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Solution Overview
Problem
Existing percutaneous mitral valve repair techniques face challenges such as difficulty in positioning clips on severely damaged flaps, limited ability to apply multiple suturing points, and inability to remove incorrectly positioned sutures, necessitating a more effective and versatile system for mitral insufficiency reduction.
Innovation Solution
A suturing catheter system comprising a suturing catheter with suture and catch needles, a knotting catheter for filament knotting, and a cutting catheter for filament ends, allowing percutaneous application of multiple suturing points and removal of incorrectly positioned sutures using an 'edge to edge' technique.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a small metal prosthesis or clip is positioned percutaneously in the heart, then the procedure avoids open heart surgery, but it is not possible to position the clip on severely damaged flaps and only a single suturing point can be placed
Solution Approach 1:
The system divides the mitral valve repair into multiple independent suturing points, each treated separately with individual catheters. This allows multiple separate interventions on different portions of the valve, enabling treatment of extensively damaged areas that a single clip cannot address
Solution Approach 2:
The catheter system is designed with universal applicability to treat various degrees of mitral valve damage through percutaneous access. The same basic catheter platform can deliver sutures to different locations and accommodate different suture configurations, making it versatile for both intact and severely damaged flaps
2Ease of operation
If a metal clip is positioned percutaneously, then the procedure is less invasive, but incorrect positioning cannot be corrected and the clip cannot be removed
Solution Approach 1:
The suture system allows for recovery and correction of incorrectly positioned sutures. Unlike permanent clips, the sutures can be manipulated, repositioned, or removed if placed incorrectly, enabling correction without additional invasive procedures
Solution Approach 2:
The suture system provides dynamic adjustability during the procedure. The sutures can be tensioned, repositioned, or removed while the catheter remains in place, allowing real-time corrections that static clips cannot accommodate
3Reliability
If multiple suturing points are required for optimal mitral valve repair, then better repair outcomes are achieved, but conventional techniques only allow a single clip placement
Solution Approach 1:
The repair is segmented into multiple independent suturing points, each delivered by separate catheter interventions. This modular approach allows optimal repair outcomes through multiple sutures while maintaining procedural simplicity through standardized catheter platforms
Solution Approach 2:
Multiple separate suture delivery catheters are combined into a coordinated system that works together to achieve the repair. The catheters can be introduced through the same percutaneous access point and manipulated in coordination to place multiple sutures efficiently
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
At least one suture filament (1) folded into a "U" wherein each end is provided with a suture needle (13), - at least one pair of stylets (12), each provided with a catch needle (15); said suture and catch needles being provided with a connecting portion (132, 152) that can allow a catch needle (15) to mechanically engage with a suture needle (13); - a lever (110) comprising a stapling arm (112), from which suture needles (13) protrude, which, together with the catheter body (101), from which the catch needles (15) protrude, defines a catch zone (113) for a flap of a mitral valve; an opposite operating arm (114) which, together with the catheter body (101), defines an operating zone (115) of the lever (110).