Inline Outflow Valve Clamp for Thrombectomy Fluid Balance
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Solution Overview
Problem
Existing thrombectomy systems face challenges in achieving fluid balance between inflow and outflow, leading to issues such as hemolysis and distal embolization due to insufficient outflow rates of effluent waste.
Innovation Solution
A thrombectomy system with a linearly displaceable tube clamp in the outflow pump that can compress or expand the effluent waste tube to control fluid flow, ensuring the outflow rate matches or exceeds the inflow rate, using a linear actuator to adjust the tube clamp position based on inflow and outflow conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional outflow pump is used in thrombectomy systems, then the system structure is simple, but the outflow rate is insufficient leading to hemolysis and distal embolization
Solution Approach 1:
The tube clamp is made linearly displaceable along the tube axis, allowing dynamic adjustment of compression force. The linear actuator enables real-time modification of the clamp position and compression level, transforming a static clamping mechanism into a dynamic one that can adapt to varying flow requirements and prevent hemolysis while maintaining adequate outflow rate
Solution Approach 2:
The system changes the compression parameter of the tube clamp dynamically. By adjusting the linear displacement of the clamp along the tube axis, the internal cross-sectional area of the tube is modified, thereby changing the flow rate parameter. This allows precise control of outflow rate to match or exceed inflow rate, preventing hemolysis and distal embolization
2Object-affected harmful factors
If the tube clamp compresses the effluent waste tube to block flow, then hemolysis is prevented, but fluid flow is obstructed
Solution Approach 1:
The linearly displaceable tube clamp enables dynamic switching between compression states. During inflow phases, the clamp can be positioned to compress the tube and block flow, preventing hemolysis. During outflow phases, the clamp is displaced to expand the tube cross-section and allow unobstructed flow, thus dynamically balancing hemolysis prevention with adequate fluid flow
Solution Approach 2:
The tube clamp operates periodically in sync with the pump cycle. It blocks flow during inflow periods to prevent hemolysis and allows flow during outflow periods to maintain adequate effluent removal. This periodic action resolves the contradiction by applying compression only when necessary, rather than continuously
3Quantity of substance
If the outflow pump is positioned to allow unobstructed flow, then fluid flow is maximized, but fluid balance cannot be controlled
Solution Approach 1:
The linear actuator controlling the tube clamp position operates based on feedback from flow sensors and pump control system. The system continuously monitors inflow and outflow rates, and adjusts the clamp displacement accordingly to maintain fluid balance. This feedback mechanism enables precise control of outflow rate to match or exceed inflow rate, preventing hemolysis while ensuring adequate effluent removal
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 effectively manages fluid balance, preventing hemolysis and distal embolization by ensuring the outflow rate matches or exceeds the inflow rate, thereby enhancing the safety and efficacy of thrombectomy procedures.
Implementation Method 1
The linearly displaceable tube clamp may be actuatable to selectively compress the effluent waste tube
Data Source
AI summary
Thrombectomy systems including a flow control outflow pump that allows for a free flow of fluid therethrough. An illustrative thrombectomy system may comprise a console, a fluid inflow pump driven by the console, a thrombectomy catheter, the fluid inflow pump configured to provide fluid inflow through the thrombectomy catheter, an effluent waste tube in fluid communication with the thrombectomy catheter, and an outflow pump comprising a stationary portion and a linearly displaceable tube clamp. The outflow pump may be configured to receive the effluent waste tube between the stationary portion and the linearly displaceable tube clamp. The linearly displaceable tube clamp of the outflow pump may be actuatable to selectively compress the effluent waste tube.