Embolic Protection Filter with Dynamic Extraction Sleeve
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Solution Overview
Problem
Current embolic protection devices fail to securely capture and remove blood clots and thrombi during angioplasty procedures, often requiring bulky components and not radially collapsing sufficiently for extraction, leading to potential emboli release.
Innovation Solution
An embolic protection device with a filter having multiple filter elements and an extraction element that moves between non-extraction and extraction positions to collapse the filter for secure removal, utilizing a delivery and extraction sleeve system to minimize cross-sectional area and prevent emboli release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter is expanded to collect emboli, then the emboli capture capability is improved, but the cross-sectional area increases making removal difficult
Solution Approach 1:
The filter is designed to be dynamic, transitioning between an expanded state for emboli capture and a collapsed state for removal. The extraction element, when actuated, causes the filter to radially collapse from its expanded configuration back to a compact form, enabling safe extraction while maintaining effective emboli capture during the procedure.
Solution Approach 2:
The device separates the filter function from the extraction function using distinct elements. The filter elements capture emboli while the extraction element (sleeve or wire) provides the collapse mechanism. This segmentation allows each component to be optimized independently - the filter for capture and the extraction element for safe removal.
2Ease of operation
If the filter is collapsed to reduce cross-sectional area for extraction, then the ease of removal is improved, but the emboli may be released back into the bloodstream
Solution Approach 1:
The extraction element is positioned and prepared in advance during the procedure. When the filter needs to be collapsed for removal, the extraction element is already in place to immediately secure the emboli as the filter collapses, preventing any release into the bloodstream during the transition from expanded to collapsed state.
Solution Approach 2:
The extraction element acts as a protective mechanism prepared beforehand. When the filter is collapsed, the extraction element ensures emboli are secured from the outset of the collapse process, cushioning against the potential harmful effect of emboli release during the critical transition phase.
3Reliability
If a mechanism is added to secure emboli during removal, then the emboli containment is improved, but the device complexity increases
Solution Approach 1:
The extraction element serves multiple functions: it controls the collapse of the filter, secures the emboli during collapse, and facilitates removal. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while still providing reliable emboli containment during removal.
Solution Approach 2:
The functions of filter collapse and emboli securement are merged into a single integrated mechanism. The extraction element simultaneously accomplishes both the radial collapse of the filter and the securing of emboli, eliminating the need for separate mechanisms and reducing overall device complexity.
Data Source
AI summary
An embolic protection device for deployment in a body vessel is provided for filtering emboli within the body vessel. The embolic protection device generally includes a filter having a plurality of openings formed therethrough and an extraction element configured to be movable with respect to the filter between a non-extraction position and an extraction position. The extraction element is located distally of the filter when in the non-extraction position so as to allow the filter to open into an expanded state to collect the emboli. Additionally, the extraction element is disposed about at least a portion of the filter when in the extraction position so as to close the filter into a collapsed state and to permit the embolic protection device to be extracted from the body vessel.