Rotary Embolectomy Device with Flexible Driveshaft and Cutting Bit
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Solution Overview
Problem
Current thrombectomy devices are ineffective against large clot burdens, cause distal embolization, and result in vascular damage, with existing suction embolectomy devices prone to clogging, vessel collapse, and increased operation time due to inefficiencies in clot removal and reinsertion processes.
Innovation Solution
A rotary embolectomy device with a flexible driveshaft coupled to a cutting bit and stabilizer, capable of fragmenting and disintegrating clots within the vessel without the need for device removal, featuring a cutting bit with multiple outlets for therapeutic agent delivery and a collecting basket to manage clot material, allowing for continuous clot removal without clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current thrombectomy devices are used to remove clots, then clot removal is achieved, but distal embolization and vascular damage occur
Solution Approach 1:
A filter is introduced as an intermediary component between the cutting mechanism and the suction lumen. The filter captures clot particles during fragmentation and removal, preventing distal embolization while allowing continuous operation. This mediator resolves the contradiction by enabling effective clot removal without the harmful side effect of particle dissemination.
Solution Approach 2:
The device employs a flexible catheter structure with a compliant cutting head that can adapt to vessel geometry. This flexibility reduces mechanical trauma to the vessel wall during navigation and operation, addressing the vascular damage issue while maintaining clot removal capability.
2Productivity
If suction embolectomy devices are used, then clot removal is achieved, but device clogging and vessel collapse occur
Solution Approach 1:
The suction system is segmented into multiple lumens or channels within the catheter. This segmentation allows continuous flow paths that reduce the likelihood of complete clogging, as clot material can be redirected through alternative pathways while maintaining suction effectiveness.
Solution Approach 2:
The device incorporates periodic flushing or irrigation cycles that prevent clot material from accumulating and clogging the suction lumen. This periodic action maintains reliable operation by clearing potential obstructions before they cause device failure or vessel collapse.
3Adaptability or versatility
If multiple device sizes are used for different lumen sizes, then adaptability is improved, but device complexity and operation time increase
Solution Approach 1:
The cutting head is designed with adjustable or interchangeable cutting elements that can be configured for different lumen sizes using a single catheter platform. This multi-functionality allows the device to adapt to various vessel diameters without requiring multiple specialized devices, reducing complexity while maintaining versatility.
Solution Approach 2:
The device incorporates expandable or adjustable components that can dynamically adapt to different lumen sizes during the procedure. This dynamic adjustment capability eliminates the need for multiple fixed-size devices, simplifying the device set while preserving adaptability across different anatomical configurations.
4Productivity
If mechanical thrombectomy is performed in cerebral arteries, then clot removal is achieved, but microvascular occlusion and vessel wall damage occur
Solution Approach 1:
A fine-mesh filter is positioned within the suction path to capture small clot particles that could otherwise cause microvascular occlusion. This intermediary filtering mechanism enables safe thrombectomy in cerebral arteries by preventing the harmful side effect of particle embolization to distal microvessels.
Solution Approach 2:
The catheter and cutting head are constructed with highly flexible, compliant materials that can navigate tortuous cerebral artery geometries without exerting excessive force on the delicate vessel walls. This flexibility minimizes mechanical trauma while maintaining the ability to reach and treat clots in complex cerebral vasculature.
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 device efficiently removes clots from various vessel sizes, reduces operation time, minimizes vascular trauma, and enhances clot dissolution with therapeutic agents, improving safety and efficacy in thrombectomy procedures.
Implementation Method 1
a rotary embolectomy device with a flexible driveshaft coupled to a cutting bit and stabilizer, capable of fragmenting and disintegrating clots within the vessel
Implementation Method 2
The device can further include a means for delivering a therapeutic agent, for instance to facilitate clot fragmentation
Implementation Method 3
which is then removed from the vessel by means of suction
Data Source
AI summary
Disclosed herein is a rotary embolectomy device. The device includes a rotatable bit which contacts a blood clot within a cannula, thereby disintegrating the clot. The clot can be removed by means of suction, complete disintegration, or a collecting basket.