Deployable Stent Basket for Vessel-Safe Fluidjet Thrombus Removal
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Solution Overview
Problem
Existing thrombectomy devices struggle to effectively remove chronic thrombus formations without causing vessel damage, particularly in sensitive areas like the spine, often requiring multiple procedures and the use of lytics, which can lead to complications such as blood loss and hemolysis.
Innovation Solution
A dynamic stent device with a deployable basket and a fluidjet mechanism that protects vessel walls while using high-pressure fluid to cut and remove thrombus, featuring a mesh structure and a jet tube for precise thrombus removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-pressure fluidjet is used to cut chronic thrombus, then thrombus removal effectiveness is improved, but vessel wall damage risk increases
Solution Approach 1:
A deployable basket acts as an intermediary structure between the high-pressure fluidjet and the vessel wall. The basket is positioned to intercept the fluidjet's path, allowing the jet to cut thrombus effectively while the basket absorbs and redirects the force, preventing direct contact with the vessel wall and eliminating the need for protective sheaths.
Solution Approach 2:
The basket transitions from a compressed delivery state to an expanded deployed state at the treatment site. This dynamic transformation allows the basket to adapt to the vessel geometry and provide optimal protection during fluidjet operation, enabling aggressive thrombus removal without compromising vessel integrity.
2Reliability
If traditional stent is used to maintain vessel patency, then vessel patency is maintained, but thrombus removal capability is lost
Solution Approach 1:
The basket is designed to perform multiple functions: it provides vessel patency maintenance similar to a traditional stent, while simultaneously serving as a protective structure enabling aggressive fluidjet thrombus removal. This multi-functionality eliminates the need to choose between patency maintenance and thrombus removal capability.
Solution Approach 2:
The patent combines the vessel support function of a stent with the protective function needed for fluidjet operation into a single basket structure. This merged design integrates both thrombus removal enablement and vessel patency maintenance in one device.
3Productivity
If multiple procedures are performed to remove chronic thrombus, then complete thrombus removal is achieved, but patient risk and cost increase
Solution Approach 1:
The basket is deployed and positioned before fluidjet thrombus removal begins. This preliminary action establishes the protective structure in advance, enabling the operator to use maximum fluidjet power from the start without concern for vessel damage, thereby achieving complete thrombus removal in a single procedure rather than requiring multiple gradual attempts.
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 efficient removal of chronic thrombus with minimal vessel damage, reducing the need for multiple procedures and lytic use, thus lowering patient risk and cost.
Implementation Method 1
high-pressure fluid to cut and remove thrombus
Implementation Method 2
dynamic stent device with a deployable basket
Data Source
AI summary
Provided is a medical device comprising a handle comprising a distal hub, a proximal hub, and a middle hub disposed between the distal hub and the proximal hub. The medical device may comprise an outer sheath coupled with the distal hub, a basket configurable in a deployed state and an undeployed state, and a jet tube shaft coupled with the proximal hub, the jet tube shaft coaxial to the outer sheath. The jet tube shaft may comprise a jet tube comprising an aperture configured to expel a fluid, a jet tube lumen sized to accept the jet tube, and an evacuation lumen.