Aortic Arch Embolic Filter Frame for Stable Sealing
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Solution Overview
Problem
Existing intravascular devices face challenges in providing improved ease of use, intravascular stability, and embolic protection during procedures like transcatheter aortic valve implantation, with issues such as windsailing, leakage, and insecure positioning, particularly in the aortic arch region.
Innovation Solution
A transvascular delivery system for an embolic protection device with a support frame and filter member, featuring spring sections for radial force and axial pivotability, designed for secure positioning and sealing against the aortic arch, utilizing a connector mechanism for deployment and retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter device is placed in the aortic arch to prevent emboli, then embolic protection is improved, but device stability and positioning security deteriorate due to windsailing and leakage
Solution Approach 1:
The support frame is divided into multiple sections including a proximal section, distal section, and intermediate sections. The proximal and distal sections are configured as spring sections that can radially expand against the aortic arch wall, while the intermediate sections provide structural support. This segmentation allows different parts of the device to perform specialized functions, improving both embolic protection and stability.
Solution Approach 2:
The support frame is designed with a curved configuration that matches the curvature of the aortic arch. The proximal and distal spring sections are arranged to radially expand against the curved wall surface, creating secure contact points that prevent device migration and windsailing while maintaining embolic protection.
2Stability of the object's composition
If spring sections are added to provide radial force, then device stability and sealing are improved, but device complexity increases
Solution Approach 1:
The spring sections are integrated directly into the support frame structure, merging the stabilization function with the structural support function. The proximal and distal spring sections are formed as continuous elements of the support frame, eliminating the need for separate stabilization components and reducing overall device complexity.
Solution Approach 2:
The support frame serves multiple functions simultaneously: it provides structural support for the filter, enables radial expansion for sealing against the aortic arch wall, and acts as a stabilization mechanism through its spring sections. This multi-functionality reduces the need for additional separate components.
3Ease of operation
If the device is made pivotable axially but not radially, then ease of operation and alignment are improved, but intravascular stability worsens
Solution Approach 1:
The device is designed with dynamic characteristics that allow axial pivoting during deployment to achieve proper alignment with the aortic arch, while the spring sections provide radial stability once positioned. The spring sections can radially expand to seal against the wall, creating a stable anchor that prevents further movement while maintaining the axial alignment achieved during operation.
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 system enhances device stability, reduces leakage, and improves coverage of side branch vessels, ensuring effective embolic protection by self-alignment and apposition with the aortic arch, minimizing risks during medical procedures.
Implementation Method 1
At least one of the distal portion and the proximal portion includes a spring section configured for providing a radial force between the support frame and a wall of the aortic arch when in an expanded state
Data Source
AI summary
A system for transvascular delivery to an aortic arch of a patient includes an embolic protection device, a connector mechanism, and a catheter or sheath for delivering the embolic protection device to a working zone. The embolic protection device includes a support frame having a distal portion and a proximal portion, and a filter member attached to the support frame and configured for preventing embolic materials from passing there through. At least one of the distal portion and the proximal portion includes a spring section configured for providing a radial force between the support frame and a wall of the aortic arch when in an expanded state. The embolic protection device is pivotable axially but not radially relative to the connector mechanism.