Dual-Pump Fluid Delivery With Recirculation for Precise Injection
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Solution Overview
Problem
Existing fluid delivery systems struggle to deliver two or more different fluids at high pressure and flow rates with precision and accuracy, especially when connected to implanted devices like PICC & PORT, and are affected by viscosity and temperature variations of contrast agents.
Innovation Solution
A fluid delivery system with two pump modules, each with a dedicated recirculation fluid circuit, alternately delivering and recirculating fluids to maintain precise delivery conditions, using pistons and actuators to manage fluid flow and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single pump module is used to deliver multiple fluids, then device complexity is reduced, but delivery precision and accuracy for each fluid deteriorates
Solution Approach 1:
The system divides the fluid delivery function into separate pump modules, with each pump module dedicated to delivering a specific fluid. This segmentation ensures that each fluid can be delivered with precise control independent of other fluids, resolving the contradiction between device simplicity and delivery precision.
2Productivity
If high pressure and flow rate are achieved, then injection efficiency is improved, but delivery accuracy deteriorates due to viscosity and temperature variations
Solution Approach 1:
The system incorporates feedback mechanisms that monitor delivery parameters and adjust pump operation in real-time. This feedback control maintains delivery accuracy despite variations in fluid viscosity and temperature, even when operating at high pressure and flow rates for improved injection efficiency.
Solution Approach 2:
The system dynamically adjusts operational parameters such as pump speed, pressure, and flow rate based on real-time conditions. By changing these parameters adaptively, the system maintains delivery accuracy while achieving high injection efficiency when needed.
3Adaptability or versatility
If implanted devices like PICC & PORT are connected, then patient access is improved, but delivery pressure and flow rate capability deteriorates
Solution Approach 1:
The system dynamically adapts its delivery characteristics based on the connected device type. When implanted devices like PICC or PORT are detected, the system adjusts pressure and flow rate parameters appropriately, maintaining adequate delivery power while ensuring compatibility with the implanted device constraints.
4Measurement precision
If recirculation fluid circuit is implemented, then delivery accuracy is improved, but device complexity and waste generation increase
Solution Approach 1:
The recirculation fluid circuit allows fluid that has passed through the delivery system to be recovered and reused. Instead of discarding this fluid, the system recirculates it back into the supply reservoir, thereby reducing fluid waste while maintaining delivery accuracy through the recirculation process.
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
Ensures accurate and precise delivery of multiple fluids at desired pressures and flow rates, overcoming the limitations of implanted devices and viscosity challenges, while reducing waste and improving efficiency.
Implementation Method 1
a piston (32) movable within said chamber (31) so as to alternately increase and decrease a volume of said first and second sub-chambers (35, 36)
Implementation Method 2
a first actuator (70) for managing a passage of said first fluid between said first and second variable-volume sub-chambers (35, 36) of said first chamber (31) according to a position of said piston (32)
Data Source
AI summary
A fluid delivery system is disclosed which comprises at least one first supply station for supplying a first fluid and at least one second supply station for supplying a second fluid different from the first fluid. The fluid delivery system further comprises a pressurizing unit for pressurizing the first and second fluids, said pressurizing unit comprising first and second pump modules, and each pump module comprising a chamber and a piston provided with a plunger to define first and second variable-volume sub-chambers. The fluid delivery system further comprises first and second inlet fluid circuits, first and second outlet fluid circuits, and a first recirculation fluid pathway fluidically connecting the first and second variable-volume sub-chambers of a pump module. Moreover, a first actuator is associated to said first recirculation fluid pathway for managing the fluid passage in both directions between said first and second variable-volume sub-chambers of said pump module. Methods of operating the fluid delivery system are disclosed too.