Microfluidic Plunger Actuator for Biosensor Fluid Control
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Solution Overview
Problem
Current analytical methods in bioassays, particularly for rapid point-of-care medical diagnostics, lack accuracy and efficiency in fluid handling and actuation within biosensor cartridges.
Innovation Solution
A microfluidic device with a microfluidic circuit including a reservoir and an active flow component, where a plunger is moved within a barrel by an actuator to initiate an active flow process, allowing unidirectional fluid flow based on predetermined flow properties, enhancing fluid actuation and handling within biosensor cartridges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current analytical methods are used in bioassays, then the device complexity is reduced, but the measurement precision and productivity deteriorate
Solution Approach 1:
The microfluidic device is divided into distinct functional modules including a reservoir, an active flow component with barrel and plunger, and a microfluidic circuit. This segmentation allows each component to perform its specific function with high precision while maintaining overall system manageability and reducing the complexity of fluid actuation through modular design.
2Productivity
If manual fluid handling methods are used, then the device complexity is low, but the productivity and measurement precision deteriorate
Solution Approach 1:
The active flow component is designed to automatically control fluid flow through the microfluidic circuit based on predetermined flow properties. The plunger moves within the barrel to generate flow without requiring continuous manual intervention, enabling the system to serve itself and significantly improving productivity and efficiency of fluid handling operations.
3Manufacturing precision
If passive fluid flow is used, then the device complexity is reduced, but the measurement precision and control over fluid flow deteriorate
Solution Approach 1:
The invention replaces passive mechanical fluid handling with an active flow component that uses a controlled plunger mechanism within a barrel to precisely regulate fluid flow. This substitution of passive systems with active mechanical control enables predetermined flow properties to be achieved with high manufacturing precision while maintaining manageable device complexity through integrated design.
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
Improves the accuracy and efficiency of fluid handling in biosensor cartridges, enabling precise control over fluid flow for enhanced diagnostic performance and multi-step assays.
Implementation Method 1
moving the plunger within the barrel from the first position to a second position based on predetermined flow properties, and flow the at least a fluid unidirectionally as a function of the active flow process
Data Source
AI summary
An apparatus for actuating of fluids in a biosensor cartridge, the apparatus includes a microfluidic device, the microfluidic device includes a microfluidic circuit comprising at least a reservoir configured to contain at least a fluid and an active flow component in fluidic communication with the at least a reservoir, wherein the active flow component comprises a barrel and a plunger at a first position within the barrel, and an actuator configured to initiate an active flow process, wherein initiating the active flow process comprises accepting the plunger using a mechanical interface mechanically communicated to the actuator and moving the plunger within the barrel from the first position to a second position based on predetermined flow properties, and flow the at least a fluid unidirectionally as a function of the active flow process.