Mitral Valve Cutting Features for Post-Implant LVOT Obstruction
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Solution Overview
Problem
Mitral regurgitation occurs when the native mitral valve leaflets fail to fully close, causing retrograde flow into the left atrium and obstructing the left ventricular outflow tract (LVOT) with artificial valves.
Innovation Solution
A replacement valve with integrated cutting features, such as blades or electrosurgical elements, is used to lacerate the anterior mitral leaflet post-implantation, allowing for clinical decision-making to address LVOT obstruction without additional procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an artificial mitral valve is implanted to treat mitral regurgitation, then valve function is restored, but the anterior mitral leaflet is displaced into the LVOT causing obstruction
Solution Approach 1:
The cutting element is integrated into the anchor structure, allowing the anterior mitral leaflet to be excised and removed from the LVOT space. This extraction of the problematic tissue resolves the obstruction caused by the artificial valve implantation while preserving the valve's regurgitation treatment function.
Solution Approach 2:
The cutting functionality is merged with the anchor structure by integrating a cutting element into the anchor. This combination allows the same device that secures the artificial valve to also remove the obstructing leaflet tissue, eliminating the need for separate cutting instruments or procedures.
2Object-affected harmful factors
If separate surgical procedures are used to address LVOT obstruction, then obstruction is relieved, but treatment time and complexity increase
Solution Approach 1:
The cutting element is integrated into the anchor structure, allowing the anterior mitral leaflet to be excised and removed from the LVOT space. This extraction of the problematic tissue resolves the obstruction caused by the artificial valve implantation while preserving the valve's regurgitation treatment function.
Solution Approach 2:
The cutting element is pre-positioned on the anchor before implantation. During the valve replacement procedure, the cutting element is already in place and can immediately be used to excise the obstructing leaflet tissue without requiring additional surgical steps or instruments.
3Ease of operation
If the cutting element is integrated into the anchor, then the procedure is simplified, but the device complexity increases
Solution Approach 1:
The cutting element is integrated into the anchor structure, combining two functions (securing the valve and cutting the leaflet) into a single component. This reduces the number of separate instruments needed during the procedure, simplifying the overall operation despite the increased complexity of the individual anchor device.
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
The integrated cutting features enable the reduction of LVOT obstruction by allowing for controlled laceration of the leaflet, expanding the neo-LVOT and improving blood flow without requiring separate surgical interventions.
Implementation Method 1
The cutting feature can include at least one electrode to conduct a current to electrically cut the leaflet of the cardiac valve of the subject
Data Source
AI summary
The present disclosure describes a replacement valve that can remove or lacerate the anterior mitral leaflet (or other portion of the heart) to reduce the obstruction of the left ventricular outflow tract (LVOT). The replacement valve can include integrated cutting features to lacerate a leaflet of a heart valve. For example, the cutting features can include blades or electrosurgical features that can cut the leaflets to reduce obstruction of the LVOT. As the cutting features are integrated components of the replacement valve, the laceration of the leaflet can follow implantation of the replacement valve and enables for clinical decisions to be made based on the degree of obstruction to the LVOT following the implantation procedure.