Direct Stream Hydrodynamic Catheter Thrombectomy Control
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Solution Overview
Problem
Prior art thrombectomy devices lack control over fluid jet streams, leading to inadequate thrombectomy due to insufficient or excessive fluid jet strength, potentially causing damage to blood vessel walls.
Innovation Solution
A direct stream hydrodynamic catheter system with radially directed fluid jet streams controlled by a high-pressure fluid pump and exhaust regulator, allowing for precise delivery and aspiration of thrombus or lesion particles, and optional use of balloons for centering and inflation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fluid jet stream strength is increased to improve thrombectomy effectiveness, then thrombus removal capability is improved, but damage to blood vessel walls occurs
Solution Approach 1:
The catheter system employs multiple jet orifices positioned at different locations and angles along the catheter body, creating localized fluid jet streams that target specific portions of the thrombus. This allows concentrated force to be applied where needed while distributing the overall impact to prevent damage to any single area of the blood vessel wall.
Solution Approach 2:
The system enables dynamic control of fluid jet stream characteristics through adjustable flow rates and multiple orifice configurations. The fluid jet streams can be modulated in intensity and direction during the procedure, allowing the operator to adapt the thrombectomy force to match the thrombus characteristics and vessel tolerance in real-time.
2Object-affected harmful factors
If fluid jet stream strength is decreased to prevent damage to blood vessel walls, then safety is improved, but thrombectomy effectiveness becomes insufficient
Solution Approach 1:
The catheter system divides the fluid jet delivery into multiple separate jet orifices positioned at different locations. Each orifice delivers a controlled stream of fluid at a moderate intensity, and the combined effect of multiple jets achieves powerful thrombectomy while keeping individual jet intensities safe for vessel walls.
Solution Approach 2:
The system combines multiple fluid jet streams from different orifices positioned at various angles and locations. The merging of these individual jets creates a cumulative thrombectomy effect that is greater than any single jet could achieve alone, while maintaining safe pressure levels on the vessel wall.
3Productivity
If multiple jet orifices are added to improve thrombectomy capability, then thrombus removal effectiveness is improved, but device complexity increases
Solution Approach 1:
The catheter system integrates multiple jet orifices into a single multi-functional device that can deliver fluid jets from multiple locations and angles. This unified structure performs the complex task of targeting different portions of thrombus without requiring multiple separate catheters or complex positioning mechanisms.
Solution Approach 2:
The multiple jet orifices are integrated within the catheter body structure in a nested arrangement, where the orifices are embedded in the catheter wall or positioned along its length. This nesting approach allows multiple functional elements to be contained within a single catheter structure, reducing overall system complexity.
4Productivity
If fluid jet streams are made more aggressive for robust thrombectomy, then thrombus removal speed is improved, but risk of hemolysis increases
Solution Approach 1:
The system applies aggressive fluid jet streams locally at specific jet orifices targeted at thrombus portions, while other areas experience gentler flow. This localized aggression allows rapid thrombus disruption without subjecting the entire blood vessel environment to high-velocity flows that would cause hemolysis.
Solution Approach 2:
The system dynamically adjusts fluid jet characteristics through controlled flow rates and timing. Aggressive jets are applied transiently to disrupt thrombus, followed by periods of reduced flow that allow blood cells to recover and prevent cumulative damage leading to hemolysis.
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 system enables robust and aggressive thrombectomy with controlled fluid jet streams that effectively remove thrombi without causing hemolysis, while also allowing for drug infusion and cell sampling, improving treatment efficacy and safety.
Implementation Method 1
radially directed fluid jet streams emanating from an emanator at the distal end of a direct stream hydrodynamic catheter tube
Implementation Method 2
provide for a hydrodynamic action in the direct impingement of deposits in the vascular conduit
Implementation Method 3
exhaust regulator...which is used to provide for the evacuation and control of the evacuation rate, i.e., aspiration of the catheter tube
Data Source
AI summary
A direct stream hydrodynamic catheter system is provided for the removal of thrombus, lesions and the like including provisions for the infusion of drugs, lysing fluids and the like into a blood vessel. Physician controlled powered direct fluid jet streams emanate from a fluid jet emanatory in the form of robust radially directed fluid jet streams to impinge upon and ablate difficult and strong thrombus and lesions within a blood vessel. Effluent aspiration is controlled by an exhaust regulator in the form of a roller pump, but effluent removal can be assistingly influenced by the fluid pressure associated with the radially directed fluid jet streams.