Prosthetic Valve Placement Evaluation for LVOT Obstruction Risk
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Solution Overview
Problem
Non-invasive percutaneous implantation of prosthetic devices, such as heart valves, is challenging due to limited field of view during procedures and reliance on 2D imaging, leading to difficulties in accurately assessing and determining optimal placement, particularly for transcatheter mitral valve replacement, which can cause issues like left ventricular outflow tract obstruction.
Innovation Solution
A computer-implemented method and system for evaluating prosthetic device placement using advanced imaging and modeling strategies, involving the definition of aortic and mitral planes, manipulation of these planes to assess blood pool volume, and determining cross-sectional surface areas to evaluate blood flow obstruction, utilizing electronic processors and memory devices for data processing and visualization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If non-invasive percutaneous implantation is performed using conventional 2D imaging, then the procedure can be performed with less invasiveness, but the field of view is limited and placement accuracy deteriorates
Solution Approach 1:
The patent transitions from 2D imaging to 3D imaging modalities (CT, MRI, echocardiography) to provide comprehensive spatial information about the mitral valve and surrounding structures. This dimensional enhancement allows physicians to visualize anatomical relationships in three dimensions, improving placement accuracy while maintaining the non-invasive percutaneous approach.
Solution Approach 2:
The patent performs pre-procedural planning using 3D imaging to identify optimal delivery catheter positioning and prosthetic valve placement before the actual implantation. This preliminary visualization and planning phase allows physicians to anticipate anatomical challenges and adjust their approach, thereby improving placement accuracy during the minimally invasive procedure.
2Ease of operation
If conventional transcatheter prosthetic heart valves are used for mitral implantation, then the procedure can be performed percutaneously, but left ventricular outflow tract obstruction may occur due to intrinsic valve geometry
Solution Approach 1:
The patent applies 3D imaging to specifically evaluate the left ventricular outflow tract geometry and blood flow patterns in relation to the planned prosthetic valve placement. This localized assessment allows physicians to identify potential obstruction risks and adjust the positioning or selection of the valve to minimize LVOT obstruction while maintaining percutaneous implantation benefits.
Solution Approach 2:
The patent performs pre-procedural evaluation using 3D imaging to anticipate and prevent left ventricular outflow tract obstruction before it occurs. By visualizing the anatomical relationships and potential obstruction risks in advance, physicians can select appropriate valve sizes and positioning strategies that prevent LVOT obstruction while achieving successful percutaneous mitral valve replacement.
3Measurement precision
If 3D imaging and advanced planning are implemented, then placement accuracy and obstruction evaluation improve, but the complexity of the procedure increases
Solution Approach 1:
The patent utilizes 3D imaging modalities (CT, MRI, echocardiography) that serve multiple functions: visualizing the mitral valve anatomy, assessing the left ventricular outflow tract geometry, evaluating blood flow patterns, and guiding prosthetic valve placement. This multi-functionality allows comprehensive evaluation and improved placement accuracy without requiring multiple separate imaging procedures, thereby limiting the increase in procedural complexity.
Data Source
AI summary
A method for evaluating placement of a prosthetic device. The method comprises designating a position in a depiction of an anatomical region that includes a first structure in which the device is to be placed, the depiction showing the first structure and/or a blood pool volume of a second structure, and wherein the designated position corresponds to a position in the first structure at which the device may be placed. The method further comprises defining a plane and offsetting a representation thereof to a point in the depiction(s) at which the device would intersect the blood pool volume if placed at the designated position. The method comprises manipulating the orientation and/or position of the offset representation and determining a cross-sectional area of the blood pool volume along the manipulated representation for evaluating obstruction through the second structure if the device was placed at a corresponding position in the first structure.