Integrated Aspiration Valve Control for One-Handed Thrombectomy
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Solution Overview
Problem
Existing intravascular treatment systems lack the ability to easily control aspiration flow rates during procedures like thrombectomy, requiring simultaneous manipulation of syringes or pumps, thrombectomy devices, and catheter stabilization, which is difficult with traditional systems.
Innovation Solution
An aspiration control device with a controllable valve and interface, integrated into or connected to a hemostasis valve, allowing a physician to adjust aspiration flow rates with a single hand while stabilizing the catheter, featuring mechanisms like sliders, push buttons, or triggers for intuitive control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional syringe or vacuum pump is used for aspiration, then maximum vacuum can be applied to achieve high reverse flow rate, but simultaneous manipulation of the syringe/pump, thrombectomy device, and catheter stabilization becomes extremely difficult
Solution Approach 1:
The patent combines the aspiration control valve with the hemostasis valve into a single integrated assembly. This merging allows the operator to control aspiration flow rate and stabilize the catheter through a unified device structure, eliminating the need to separately manipulate multiple components while maintaining high aspiration efficiency
Solution Approach 2:
The hemostasis valve assembly is designed to perform multiple functions: it provides hemostatic sealing, controls aspiration flow rate through an integrated valve, and stabilizes the catheter. This multi-functionality allows a single device to replace what would traditionally require separate instruments, improving ease of operation while maintaining productivity
2Productivity
If full vacuum is applied continuously during thrombectomy, then maximum reverse flow rate is achieved, but vessel collapse due to negative pressure becomes a risk
Solution Approach 1:
The patent incorporates a control valve that allows dynamic adjustment of the aspiration flow rate during the procedure. The valve can be opened or closed to varying degrees, enabling the operator to modulate the vacuum effect in real-time. This dynamic control prevents excessive negative pressure that could cause vessel collapse while maintaining sufficient reverse flow rate for effective thrombectomy
Solution Approach 2:
The control valve mechanism changes the flow rate parameter of the aspiration system. By adjusting the valve opening, the operator can vary the aspiration flow rate from maximum to reduced levels, allowing optimization of the negative pressure effect to prevent vessel collapse while maintaining clot retrieval efficiency
3Quantity of substance
If a syringe is used for aspiration, then fixed volume can be effectively utilized, but the aspiration rate cannot be easily modified during the procedure
Solution Approach 1:
The control valve transforms the static aspiration system into a dynamic one. The valve can be adjusted during the procedure to change the aspiration rate, allowing the operator to adapt to different clinical situations while still utilizing the fixed volume capacity of the syringe or vacuum pump 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
Enables precise control of aspiration flow rates during thrombectomy, reducing the risk of vessel collapse and improving the efficiency of clot retrieval by allowing simultaneous manipulation of the thrombectomy device and catheter stabilization.
Implementation Method 1
The control valve can have an opening resizable from a first dimension to a second dimension, the first dimension sized to limit flow of aspirated blood from the catheter at a first flow rate, and the second dimension sized to limit flow of aspirated blood from the catheter at a second flow rate
Implementation Method 2
a vacuum source. The flow path can extend from a lumen of the catheter to a side port of the hemostasis valve
Data Source
AI summary
An aspiration control device can have an aspiration control valve and a switch, button, slider, trigger, grip, lever, rotating wheel, rotating valve, handle or other interface for resizing the aspiration control valve. The aspiration control interface can be conveniently positioned and configured to be manipulated while simultaneously stabilizing a catheter and/or retracting an elongated member. The aspiration control device can be integrated with a hemostasis valve, integrated with a wire gripping device, and/or attached to an inlet, outlet, hose, pump, or syringe in series with an aspiration flow path.