Biodetection Cassette Deformable Connector Fluid Actuation
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Solution Overview
Problem
Existing microfluidic devices for pathogen detection are limited by their complexity, requiring specialized training for operation, and are not suitable for rugged field environments, as they lack the capability for intricate fluid actuation schemes necessary for detecting certain pathogens.
Innovation Solution
The development of analysis cassettes with a substrate, removable sealing layers, and deformable connector layers, along with an actuator capable of moving relative to the fluidic element, allows for complex fluidic communication and processing, enabling robust and user-friendly pathogen detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If existing detection systems use linear arrangement of components, then device complexity is reduced, but the capability to perform intricate fluid actuation schemes is limited
Solution Approach 1:
The patent transitions from a linear one-dimensional arrangement of fluidic components to a two-dimensional planar configuration where reservoirs, conduits, and mixing chambers are arranged on a substrate. This dimensional change enables complex fluid actuation schemes including repeated transport between components, multiple mixing operations, and intricate flow paths without proportionally increasing device complexity
Solution Approach 2:
The patent implements nested functionality by integrating multiple fluidic operations within a compact planar structure. The deformable connector layer is positioned between the actuator and the substrate, creating a nested arrangement where the connector mediates between mechanical actuation and fluidic operations. This nesting enables complex fluid schemes to be performed within a compact footprint
2Ease of operation
If detection devices are designed for rugged field environment, then portability and ease of operation are improved, but the capability to perform multiple mixing, washing, and reacting steps is reduced
Solution Approach 1:
The patent implements self-service through the deformable connector layer that automatically responds to actuator movement by deforming and sealing/conducting fluid flow as needed. The connector's deformability allows it to passively execute complex fluid actuation schemes without requiring complex control systems or trained operators, thereby maintaining ease of operation while enabling multiple mixing, washing, and reacting steps
Solution Approach 2:
The patent employs dynamic elements including the deformable connector layer that changes its sealing properties in response to actuator movement, and the planar arrangement that enables flexible fluid routing. These dynamic features allow the device to perform intricate multi-step detection protocols while maintaining a simple, portable form factor suitable for field use
3Adaptability or versatility
If complex fluid actuation schemes are implemented, then detection of certain pathogens is enabled, but device complexity and operator training requirements increase
Solution Approach 1:
The deformable connector layer serves as an intermediary between the simple actuator and the complex fluidic network on the substrate. This intermediary translates simple actuator movements into complex fluid actuation schemes by deforming to seal or open specific fluid paths as needed, thereby enabling sophisticated detection capabilities without requiring the entire system to be complex
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
This solution enables efficient and automated pathogen detection in a rugged environment, reducing the need for specialized training and allowing for intricate fluid transport schemes, enhancing the utility of the devices for field use.
Implementation Method 1
a deformable connector layer, the deformable connector layer being capable of sealing at least a portion of the substrate, and the deformable connector layer being capable of placing the at least one reservoir in fluidic communication with at least the first conduit, with at least the second conduit, or both
Implementation Method 2
an actuator comprising an actuating plate capable of motion relative to the fluidic element, the plate comprising at least one projection, the actuator further comprising at least one moveable body contained within a housing, the moveable body positioned between the plate and the cassette such that motion of the at least one projection gives rise to the moveable body actuating the deformable sealing layer
Data Source
AI summary
Provided are analysis cassettes that include removable sealing layers and deformable connector layers that place various channels, chambers, and reservoirs on the cassettes into fluid communication with one another. The cassettes are suitable for use in self-contained, immunoassay devices that may be operated in an automated fashion. Also disclosed are methods for analyzing samples by use of the disclosed cassettes.