Transapical Removal Device for Mitral Valve Clip Extraction
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Solution Overview
Problem
Current treatments for mitral valve regurgitation, particularly the removal of mitral valve clips, often require open-heart surgery and do not address potential left ventricular outflow tract obstructions, leading to elevated morbidity and mortality.
Innovation Solution
A transapical removal device equipped with a delivery catheter and snare head, capable of capturing and removing mitral valve clips or altering anterior leaflets, utilizing a snare basket and ablation catheters to facilitate minimally invasive procedures without the need for open-heart surgery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If open-heart surgery is used to remove mitral valve clips, then complete removal can be achieved, but patient morbidity and mortality increase
Solution Approach 1:
The patent replaces the mechanical open-heart surgery system with a catheter-based delivery system that uses magnetic fields and radiofrequency energy to remove clips and ablate tissue percutaneously, eliminating the need for surgical incisions and reducing patient trauma
Solution Approach 2:
The patent introduces a delivery catheter as an intermediary device that carries ablation electrodes and magnetic field generators to the target site, enabling remote treatment through blood vessels without direct surgical access to the heart
2Productivity
If transcatheter mitral valve replacement is performed without addressing LVOT obstruction, then valve replacement can be completed, but future LVOT obstruction complications occur
Solution Approach 1:
The patent performs preliminary ablation of the anterior mitral leaflet and surrounding tissue before valve replacement to prevent future LVOT obstruction, addressing the potential complication before the patient undergoes the procedure
3Reliability
If mitral valve clips are deployed to treat regurgitation, then valve function improves, but future removal options are limited
Solution Approach 1:
The patent replaces the permanent mechanical clip structure with a magnetically controllable system that allows the clip to be released and removed through magnetic field manipulation, restoring future treatment options
Solution Approach 2:
The patent introduces magnetic fields as an intermediary mechanism to control and retrieve the clip, enabling non-surgical removal through the skin without requiring open-heart surgery
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the removal of mitral valve clips and modification of anterior leaflets through catheter procedures, reducing morbidity and mortality by avoiding open-heart surgery and addressing left ventricular outflow tract obstructions, thereby facilitating transcatheter mitral valve replacement.
Implementation Method 1
In some arrangements, magnets may be provided on the snare basket to facilitate closing the snare basket around the pre-positioned mitral valve clip or the anterior leaflet
Implementation Method 2
In some arrangements within the scope of the present disclosure, each ablation delivery catheter comprises an electrode for supplying radiofrequency energy to ablate tissue adjacent the mitral valve clip or anterior leaflet
Data Source
AI summary
A transapical removal device that can be deployed in a catheter procedure to capture for removal or alteration a mitral valve clip or heart tissue, such as the anterior leaflet of the mitral valve, and methods of use are disclosed. The removal device includes a delivery catheter configured to be deployed near a mitral valve using a guide catheter. The delivery catheter has a snare head at the distal end, which assumes a collapsed state during movement of the delivery catheter through the guide catheter and deployed state for capturing a mitral valve clip or anterior leaflet. The snare head has one or more ablation delivery catheters configured to ablate tissue surrounding the pre-positioned mitral valve clip or anterior leaflet. In some arrangements within the scope of the present disclosure, the removal device includes a deployment mechanism for deploying a new transcatheter valve into the mitral valve.