Excisional Device for Vascular Material Removal
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Solution Overview
Problem
Current medical devices for vascular clearing and restoration, particularly for chronic total occlusion removal, are limited by their invasive nature and inability to effectively remove a wide range of materials, including solids, semi-solids, and liquids, during a single insertion.
Innovation Solution
The development of a hand-held or mounted excisional device capable of removing various materials during a single percutaneous insertion, featuring structures and functionalities for different phases of vascular clearing or restoration procedures, and allowing for insertion through the central lumen of another compatible device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current vascular clearing devices are used, then invasive procedures are performed, but the ability to remove a wide range of materials (solids, semi-solids, liquids) during a single insertion is limited
Solution Approach 1:
The excisional device is designed with a universal architecture that enables removal of multiple material types (solids, semi-solids, liquids) through a single insertion. The device incorporates adjustable cutting elements and retrieval mechanisms that can adapt to different material consistencies and vascular obstruction types, allowing one device to perform multiple functions that previously required separate specialized devices.
Solution Approach 2:
The device incorporates dynamic, adjustable components including variable cutting element configurations and adaptable retrieval mechanisms. These dynamic features allow the device to modify its cutting and retrieval capabilities based on the specific material being removed and the vascular anatomy, enabling versatile material removal while maintaining a relatively compact base structure.
2Productivity
If multiple insertions are performed to remove different materials, then complete vascular clearing is achieved, but procedure time and patient trauma increase
Solution Approach 1:
The device merges multiple functional capabilities (cutting solids, semi-solids, liquids, and retrieving various material types) into a single integrated system that operates through one insertion. By combining cutting elements and retrieval mechanisms in one device, the procedure eliminates the need for multiple separate insertions, thereby reducing total procedure time and patient trauma while maintaining complete vascular clearing capability.
3Productivity
If aggressive cutting methods are used to remove occlusions quickly, then productivity increases, but risk of vascular damage and complications increases
Solution Approach 1:
The device incorporates adjustable cutting parameters including variable cutting element exposure, controllable cutting force, and adjustable retrieval mechanisms. These parameter changes allow the operator to optimize cutting aggressiveness based on the specific vascular anatomy and obstruction characteristics, enabling efficient occlusion removal while minimizing the risk of vascular damage through controlled, adaptive cutting rather than aggressive fixed-force methods.
Data Source
AI summary
A platform device for material excision or removal from vascular structures for either handheld or stereotactic table use may comprise a work element or elements configured to selectively open and close at least one articulable beak or scoopula configured to penetrate and remove intra-vascular materials or obstructions or follow a central lumen of another device or over a wire in a longitudinal direction. Flush and vacuum tissue transport mechanisms may be incorporated. A single tube or an inner sheath and an outer sheath which may be co-axially disposed relative to a work element may be configured to actuate a beak or beaks or scoopulas and provisions for simultaneous beak or scoopula closing under rotation may be incorporated.