Self-Expanding Mesh Conduit for Sinus Venosus ASD

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Solution Overview

Problem

Current treatments for sinus venosus atrial septal defects lack a percutaneous interventional method, relying on surgical procedures that come with longer recovery times and higher risks of infection.

Innovation Solution

A device with a hollow lumen and expandable mesh portions is used to create a conduit between the left atrium and pulmonary vein, anchored by self-expanding meshes to bridge the defect, utilizing a balloon catheter and locking system for secure placement and removal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If surgical repair is used to treat sinus venosus ASD, then the defect can be closed, but recovery time increases and infection risk increases

Engineering Contradiction:

Improvedefect closure effectivenessVSAvoidrecovery time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces the mechanical surgical system (incisions, sutures, sternotomy) with a percutaneous catheter-based delivery system. The封堵 device is delivered through a catheter inserted via femoral vein, eliminating the need for open surgical incisions and resulting in shorter recovery time and reduced infection risk while maintaining effective defect closure.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The封堵 device employs flexible mesh structures and thin film components that can be compressed into a small profile for catheter delivery, then expand at the target site to effectively close the ASD. This flexible construction allows percutaneous delivery while maintaining the structural integrity needed for reliable defect closure.

Inventive Principle:

Principle #30Flexible shells and thin films

2Reliability

If surgical repair is used to treat sinus venosus ASD, then the defect can be closed, but infection risk increases

Engineering Contradiction:

Improvedefect closure effectivenessVSAvoidinfection risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If percutaneous intervention is developed for sinus venosus ASD, then recovery time decreases and invasiveness is reduced, but device complexity increases

Engineering Contradiction:

Improveminimally invasive procedureVSAvoiddevice structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The封堵 device is divided into multiple functional segments: a distal anchoring structure for securing in the pulmonary vein, a central occlusion element for closing the ASD, and a proximal portion for delivery and stabilization. This segmentation allows each component to be optimized for its specific function while enabling percutaneous delivery through a catheter.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The封堵 device is designed to be nested within a delivery catheter in a compressed state, allowing it to be delivered percutaneously through a small incision. Once positioned at the target site, the device expands from its compressed nested configuration to its functional expanded state, achieving complex defect closure through a minimally invasive approach.

Inventive Principle:

Principle #7Nested doll (Nesting)

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

This method provides a minimally invasive, reversible treatment option with faster recovery times and fewer complications compared to traditional surgical methods, effectively diverting blood flow and closing the atrial septal defect.

Implementation Method 1

The proximal portion may include a self-expanding mesh. The distal portion may include a self-expanding mesh

Methodology Applied

Scientific EffectSelf-expanding mesh: Elasticity

Data Source

PatentUS11395644B2Sinus venosus atrial septal defect treatment device

Publication Date: 2022.07.26 GULF MEDICAL TECH

AI summary

Devices and methods for treating a sinus venosus atrial septal defect. A treatment device may have a tubular shape and may be configured to be arranged to provide a conduit between an upper right pulmonary vein (PV) and a left atrium (LA). The device may have a proximal portion comprising a flexible mesh configured to anchor within the LA, a distal portion comprising a flexible mesh configured to anchor within the target PV, and a central portion having a plurality of elongate parallel bars. A method for treating a sinus venosus atrial septal defect may include percutaneously advancing the device through the femoral vein and inferior vena cava (IVC), and into the right atrium (RA). The method may include creating a trans-septal opening, passing the device through the opening into the LA, and toward the upper right PV to treat the defect.