Integrated Stentriever and Balloon for Clot Removal
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Solution Overview
Problem
Current intravascular treatments require separate devices for clot removal, angioplasty, and prevention of restenosis, leading to multiple procedures and increased complexity.
Innovation Solution
A single integrated intravascular device combining a self-expanding stentriever and a semi-compliant balloon that can perform clot capture, angioplasty, and prevention of restenosis in a streamlined procedure, allowing for simultaneous use of both components within the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate devices are used for clot removal, angioplasty, and restenosis prevention, then each function can be performed with dedicated equipment, but the number of procedures and device complexity increases
Solution Approach 1:
The patent combines three separate intravascular devices (stentriever for clot removal, balloon catheter for angioplasty, and stent for restenosis prevention) into a single integrated device. The stentriever components (distal and proximal anchors, struts forming a capture volume) are integrated with a balloon and stent structure, allowing all three functions to be performed in one procedure without requiring multiple separate device insertions and manipulations.
Solution Approach 2:
The integrated intravascular device is designed to perform multiple functions: the stentriever portion captures and removes clots through its expandable capture volume, the balloon performs angioplasty by inflating to compress plaque against vessel walls, and the stent provides structural support to prevent restenosis. This multi-functional design eliminates the need for separate dedicated devices for each function.
2Reliability
If multiple separate procedures are performed for clot removal, angioplasty, and stent deployment, then each function can be optimized independently, but treatment time and patient exposure to procedural risks increase
Solution Approach 1:
The patent merges three sequential procedures into a single integrated procedure where the stentriever, balloon, and stent functions are combined in one device that can be deployed simultaneously or in a coordinated sequence, reducing total treatment time and patient exposure to procedural risks while maintaining functional optimization through integrated design.
Solution Approach 2:
The device is designed so that the stentriever capture volume is prepared in advance to receive the clot, the balloon is pre-positioned for angioplasty, and the stent structure is ready for deployment. This preliminary preparation allows all functions to be executed efficiently in a single procedure without requiring multiple separate access and positioning steps.
3Productivity
If a single integrated device is used for clot removal, angioplasty, and restenosis prevention, then procedural efficiency increases, but device design and manufacturing complexity increases
Solution Approach 1:
The integrated device is segmented into distinct functional modules: the stentriever portion with distal and proximal anchors and struts forming a capture volume, the balloon section for angioplasty, and the stent structure for restenosis prevention. This segmentation allows each module to be manufactured using specialized processes and then assembled into the integrated device, managing manufacturing complexity while maintaining procedural efficiency.
Solution Approach 2:
The device employs a nested structure where the balloon is positioned within the stentriever framework, and the stent structure encompasses both components. This nesting allows compact packaging for delivery and coordinated deployment of all three functions from a single catheter, improving procedural efficiency while using standardized manufacturing techniques for each nested component.
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 solution reduces the need for multiple devices and procedures, enhancing efficiency and flexibility by enabling clot removal, angioplasty, and restenosis prevention in a single session, with the self-expanding stentriever embedding and detaching as needed to maintain vessel patency.
Implementation Method 1
the self-expanding stentriever is transitionable upon withdraw of an externally applied mechanical force imposed by the microcatheter between a compressed state having a reduced diameter and a self-expanded state having an enlarged diameter
Implementation Method 2
Once the catheter has been advanced to coincide with the narrowed opening of the vessel a balloon disposed on the end of the catheter is inflated. As the balloon expands, the plaque is pushed radially outward against the inner walls of the vessel thereby restoring blood flow therethrough
Data Source
AI summary
A single integrated intravascular device including a stentriever and semi-compliant balloon housed therein. After traversing a clot, the device is deployed to a self-expanded state engaging the clot therein, whereupon the device along with the embedded clot is removed. Detecting through imaging a stenosis at an original position of the captured clot, the device is reintroduced to that location and the stentriever is deployed to a self-expanded state. Inflating the semi-compliant balloon enlarges the stentriever to a hyper-expanded state greater than the self-expanded state thereby dilating the vessel while simultaneously completely detaching/releasing the stentriever from a remaining portion of the device. Then the semi-compliant balloon is collapsed and withdrawn along with the remaining portion of the device, while the detachable/releasable portion of the stentriever in the self-expanded state remains in the vessel.