Rotating Basket Catheter for Deep Vein Thrombosis Clot Removal
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Solution Overview
Problem
Current methods for removing clots in deep vein thrombosis are limited by lack of control over mobile clots, systemic risks from pharmacological agents, and potential damage to vascular structures during mechanical removal.
Innovation Solution
A catheter-based device with a rotating basket structure and aspiration means, featuring expandable and independently controlled diameter, rotational speed, and occlusive isolation elements to safely and effectively remove clots while preventing embolization and vascular damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mechanical removal devices are used to remove clots, then clot removal capability is improved, but risk of vein or arterial damage increases
Solution Approach 1:
The device divides the clot removal function into multiple components: a rotatable basket for maceration, aspiration catheters for removal, and occlusion balloons for isolation. This segmentation allows each component to perform its specific function with optimized design, reducing overall damage to vascular structures while maintaining effective clot removal capability
Solution Approach 2:
The device introduces occlusion balloons as intermediary elements that isolate the clot from the vascular system during removal. These balloons act as a protective barrier, preventing direct contact between mechanical removal devices and the vascular wall, thereby reducing the risk of arterial or venous damage while enabling effective clot maceration and aspiration
2Productivity
If pharmacological lytic agents are used to dissolve clots, then clot removal is achieved, but systemic risks increase
Solution Approach 1:
The device extracts and removes the clot mechanically through aspiration and maceration, eliminating the need for pharmacological lytic agents. This extraction approach achieves clot removal without introducing systemic risks associated with drugs like urokinase, while maintaining effective treatment of deep vein thrombosis
Solution Approach 2:
The invention replaces pharmacological chemical action with mechanical action. Instead of using lytic agents to chemically dissolve clots, the device employs mechanical maceration through rotation and aspiration to physically remove clots, thereby achieving clot removal without systemic pharmacological risks
3Productivity
If mobile clots are removed without control, then clot removal speed is improved, but risk of embolization increases
Solution Approach 1:
The device performs preliminary isolation of the clot using occlusion balloons before mechanical removal. This preliminary action secures the clot in place and creates a controlled environment for subsequent maceration and aspiration, enabling fast removal while preventing embolization by ensuring the clot remains contained during the entire removal process
Solution Approach 2:
The occlusion balloons serve as intermediary elements that control and contain mobile clots during removal. These balloons prevent uncontrolled movement of clot fragments, allowing rapid mechanical removal while maintaining embolization protection through continuous isolation of the clot from the vascular system
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 enables controlled and safe removal of clots with reduced risk of embolization and vascular damage, improving the efficacy of clot removal in deep vein thrombosis.
Implementation Method 1
The basket structure can be made of strut material that provides enough stiffness to macerate and emulsify clots
Implementation Method 2
The vacuum is provided proximally in the handle mechanism via a vacuum syringe or vacuum pump
Implementation Method 3
The occlusion elements provide isolation of the clot during maceration and infusion/aspiration so as to inhibit particle embolization
Data Source
AI summary
The invention being disclosed describes a medical device for removal of a thrombus or clot in a vascular setting by using a rotational, expandable basket structure in combination with drug infusion, blood/particle aspiration and clot isolation by distal and proximal occlusion.