Telescoping Clot Extraction Assembly for Wall-Adherent Clots
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Solution Overview
Problem
Existing clot extraction technologies struggle with efficiently removing high-volume, long-length blood clots, particularly those with a wall adherent component, in vascular systems, often causing trauma and inefficiency.
Innovation Solution
A clot extraction system featuring a telescoping 5-shaft assembly with a coring element and mesh support, allowing independent adjustment of the coring and collecting actions, including a cutting edge for separating clots from vessel walls and a mesh for collecting clots, with adjustable angles and lengths to adapt to varying vessel diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a stent retriever or aspiration catheter is used to remove blood clots, then clot removal capability is improved, but vascular trauma increases due to the need to physically extract or dissolve clots from adherent positions
Solution Approach 1:
The cutting blade is extracted as a separate, deployable element from the catheter system. It can be selectively deployed to cut clots adhering to vessel walls and then retracted, separating the cutting function from the clot extraction function to minimize trauma during the procedure
Solution Approach 2:
The cutting blade performs preliminary action by severing clots from the vessel wall before the main extraction process. This pre-cutting action reduces the force needed during subsequent clot removal, thereby minimizing vascular trauma while maintaining effective clot extraction
2Device complexity
If the clot extraction device uses a fixed structure, then device simplicity is improved, but adaptability to varying vessel diameters and clot configurations deteriorates
Solution Approach 1:
The device incorporates dynamic elements including the deployable/retractable cutting blade and the expandable/contractible mesh structure. These elements can be adjusted during the procedure to adapt to different vessel diameters and clot configurations, providing versatility without requiring multiple fixed-size devices
Solution Approach 2:
The cutting blade is nested within the catheter structure when not in use, and the mesh is nested within the delivery system. This nesting approach allows the device to maintain a compact profile for delivery while expanding to provide the necessary adaptability during the procedure, balancing simplicity with versatility
3Device complexity
If the coring element and mesh are coupled together, then device complexity is reduced, but independent control of coring and collecting actions is lost
Solution Approach 1:
The device is segmented into functionally independent components: the coring element with cutting blade and the mesh collection structure. Each can be independently deployed, positioned, and controlled through separate control mechanisms, allowing the operator to perform coring and collection actions independently as needed
Data Source
AI summary
A provided clot extraction system can be used for the removal of clot that may have a wall adherent component. The clot extraction system includes a cover sleeve and a telescoping 5-shaft assembly. A coring element having a blade used for physically breaking down clot is coupled to the shaft assembly. A mesh support element is coupled to the shaft assembly. An open end of a mesh is coupled to the mesh support element and a distal end of the mesh is coupled to the shaft assembly. The mesh is used to collect clot within the vessel, such as the clot that the blade of the coring element separates from the vessel wall. The shape of the coring element or the mesh support element may be altered via the shaft assembly.