Modular Pump Module Recirculation for Homogeneous Fluid Delivery
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Solution Overview
Problem
Existing fluid delivery systems face challenges in maintaining fluid homogeneity, achieving high pressures and flow rates, managing complex structural solutions, and delivering multiple fluids with precision, especially when connected to implanted devices or requiring specific delivery conditions.
Innovation Solution
A modular fluid delivery system with recirculation fluid circuits and adjustable pump modules ensures fluid homogeneity and pressure equalization, allowing high-pressure and high-flow rate delivery, and accommodates multiple fluids with precise control, using disposable components for versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a power injector is used to deliver liquid composition with microparticle suspension, then injection rate and delivery control are improved, but particle segregation and loss of homogeneity occur due to gravity and buoyancy
Solution Approach 1:
The pump module introduces a vibration or oscillation component to the piston movement, creating dynamic fluid motion that prevents microparticle settlement and maintains suspension homogeneity during high-rate injection. The vibratory motion counteracts gravity and buoyancy forces that would otherwise cause particle segregation.
Solution Approach 2:
The system transitions from static piston positioning to dynamic oscillating piston movement. The piston alternates between forward injection strokes and backward recirculation strokes, creating continuous fluid circulation that keeps microparticles uniformly distributed throughout the injection process.
2Stability of the object's composition
If recirculation fluid circuit is added to maintain homogeneity, then particle distribution is improved, but device complexity increases
Solution Approach 1:
The recirculation fluid circuit is integrated into the existing pump module structure, combining the injection function and recirculation function within a single modular unit. The inlet and outlet fluid circuits are merged with the recirculation circuit, allowing fluid to flow through multiple pathways without requiring separate independent systems.
Solution Approach 2:
The pump module serves multiple functions simultaneously: it acts as both an injection pump and a recirculation pump, and the fluid circuits serve dual purposes of delivering fluid to the patient and recirculating fluid to maintain homogeneity. This multi-functionality reduces the need for separate dedicated systems.
3Productivity
If high pressure and high flow rate delivery is achieved, then injection efficiency is improved, but pressure pulsations and delivery accuracy deteriorate
Solution Approach 1:
The system employs periodic reciprocating piston movement with alternating injection and recirculation phases. This periodic action creates controlled pressure fluctuations that are smoothed through the recirculation pathway, allowing high peak flow rates during injection while maintaining overall delivery accuracy through the balancing effect of recirculation.
Solution Approach 2:
The recirculation circuit ensures continuous fluid motion and mixing even during the injection phase, preventing interruptions in the useful action. The continuous circulation maintains pressure stability and homogeneity throughout the delivery process, ensuring accurate dosing despite high flow rates.
4Adaptability or versatility
If modular design with disposable components is used, then versatility and ease of operation are improved, but manufacturing cost increases
Solution Approach 1:
The fluid delivery system is divided into distinct modular components: a reusable base unit containing the control system and power supply, and disposable pump modules that can be independently manufactured and replaced. This segmentation allows each module to be optimized for its specific function and manufactured using appropriate processes for that component type.
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 achieves efficient, reliable, and accurate fluid delivery with reduced latency and pressure pulsations, adaptable to various applications, and compatible with implanted devices, ensuring consistent fluid properties and delivery conditions.
Implementation Method 1
which allows recirculation of the fluid within the pump module, thereby contributing to a pressure equalization within the pump module
Data Source
AI summary
A modular fluid delivery system is disclosed which comprises at least one supply station for supplying at least one fluid, and a pressurizing unit for pressurizing the at least one fluid, the pressurizing unit comprising at least one driving unit and at least one disposable pump module assembly. The disposable pump module assembly comprises at least one disposable pump module and a fluid circuit tubing. The disposable pump module comprises a supporting element which defines at least one chamber, at least one inlet fluid circuit pathway, at least one outlet fluid circuit pathway and at least one recirculation fluid circuit pathway. The fluid circuit tubing comprises at least one inlet fluid circuit tubing, at least one outlet fluid circuit tubing and at least one recirculation fluid circuit tubing.