Multi-Frame Prosthetic Valve Transverse Deformation Resistance

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Solution Overview

Problem

Conventional prosthetic valves face challenges in accessing and properly positioning treatment regions within the anatomy, and maintaining efficacy post-deployment, particularly in minimally invasive transcatheter delivery methods.

Innovation Solution

The development of a prosthetic valve with a multi-frame subcomponent configuration, featuring an anchor frame and leaflet frame with complementary shoulder features, allowing for transition between delivery and deployed configurations, providing enhanced transverse deformation resistance through an interference fit, and including an interstage subcomponent for blood flow management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a single-frame prosthetic valve design is used, then the device structure is simpler, but the transverse deformation resistance and structural integrity are insufficient

Engineering Contradiction:

Improvetransverse deformation resistanceVSAvoidframe structure complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The prosthetic valve is divided into multiple frame subcomponents (first frame subcomponent, second frame subcomponent, third frame subcomponent) that can be independently delivered and then assembled together. Each subcomponent provides specific structural support, and their combination creates a multi-frame structure with enhanced transverse deformation resistance while maintaining individual component simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The frame subcomponents are designed to nest within each other during delivery, with smaller components fitting inside larger ones. This nested configuration allows all components to be delivered through a single catheter in a compressed state, then deployed sequentially to form the complete multi-frame structure with high transverse strength.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Strength

If frame subcomponents are delivered separately, then the transverse deformation resistance is enhanced, but the deployment positioning precision becomes more difficult

Engineering Contradiction:

Improvecombined interface transverse deformation resistanceVSAvoidpositioning precision during deployment

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

Complementary asymmetric features (shoulder features and complementary shoulder features) are incorporated on the frame subcomponents. These asymmetric geometries ensure that components can only assemble in the correct orientation and position, providing self-aligning capability that enhances positioning precision during deployment while maintaining the multi-frame structural strength.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

Interface regions with specific local features (shoulder features, complementary shoulder features, interference fit regions) are created at specific locations on the frame subcomponents. These localized structural qualities enable precise engagement and positioning when components are assembled, ensuring accurate relative positioning without requiring high precision throughout the entire component structure.

Inventive Principle:

Principle #3Local quality

3Stability of the object's composition

If the frame subcomponents are tightly engaged via interference fit, then the structural integrity is improved, but the ease of assembly and deployment is reduced

Engineering Contradiction:

Improvestructural integrity in deployed configurationVSAvoidease of assembly during deployment

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The frame subcomponents are pre-configured with complementary interface features (shoulder features, interference fit geometries) during manufacturing. This preliminary preparation ensures that when the components are brought together during deployment, they automatically engage in the correct configuration with appropriate mechanical interference, achieving stable structural integrity without requiring complex assembly operations.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The interference fit and complementary shoulder features are designed to enable self-alignment and self-assembly of the frame subcomponents. When deployed, the components automatically engage with each other through their complementary geometries, creating a tightly integrated structure with high structural integrity without requiring external tools or complex manipulation procedures.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20220273426A1Transcatheter prosthetic valve with multi-part frame subcomponent transverse deformation resistance

Publication Date: 2022.09.01 EDWARDS LIFESCIENCES CORP

AI summary

Various inventive concept examples relate to configurations for achieving enhanced transverse deformation resistance in prosthetic valves utilizing overlapping, multi-frame subcomponent configurations, including associated systems and methods of use and manufacture thereof.