Microfluidic Cell Analyzer Using Converging Pressure Waves
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Solution Overview
Problem
Current methods lack the capability to accurately measure and analyze the mechanical deformability of cells at a single-cell level, which is crucial for understanding biological behavior, diagnostic purposes, and predicting cell migration and metastatic potential.
Innovation Solution
A compact, integrated microfluidic system with fluid actuation devices and sensors that generate pressure waves to deform cells and measure impedance, allowing for real-time deformation analysis and sorting based on mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current methods are used to measure cell mechanical properties, then general cell analysis can be performed, but single-cell level deformation measurement capability is lacking
Solution Approach 1:
The system segments the cell analysis process into individual single-cell events, using a microfluidic channel that allows cells to pass through one by one. This segmentation enables precise measurement of mechanical properties at the single-cell level while maintaining the ability to analyze multiple cells sequentially, resolving the contradiction between measurement precision and quantity of analysis.
2Measurement precision
If a compact integrated microfluidic system is used, then single-cell deformation measurement is enabled, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into a single integrated microfluidic device: cell transport, pressure wave generation, deformation measurement, and sorting are all combined in one compact system. This integration enables precise single-cell deformation measurement while consolidating components to manage device complexity, rather than using separate systems for each function.
3Measurement precision
If pressure waves are used to deform cells, then mechanical deformability can be measured, but real-time sorting capability is required
Solution Approach 1:
The system performs preliminary measurement of cell mechanical deformability as cells pass through the microfluidic channel, before they reach the sorting stage. This preliminary action allows the system to prepare sorting decisions in advance, enabling real-time sorting based on pre-measured mechanical properties without delaying the sorting 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
Enables precise measurement of cell deformation and visco-elastic properties, facilitating the prediction of cell migration and metastatic potential, and enabling real-time sorting of cells based on their mechanical characteristics.
Implementation Method 1
two fluid actuation devices on opposite sides of a sensing location to generate pressure waves within a fluid that deform a cell to be analyzed at the sensing location
Implementation Method 2
The impedance of the fluid at the sensing location is measured using a sensor and the deformation of the cell is determined based on the measured impedance
Data Source
AI summary
A system includes a microchannel analysis region, a first fluid actuation device, a second fluid actuation device, a sensor, and a controller. The first fluid actuation device is at a first end of the microchannel analysis region. The second fluid actuation device is at a second end of the microchannel analysis region opposite to the first end. The sensor is within the microchannel analysis region between the first fluid actuation device and the second fluid actuation device. The sensor measures an impedance of a fluid within the microchannel analysis region. The controller activates the first fluid actuation device to generate a first pressure wave in the fluid and activates the second fluid actuation device to generate a second pressure wave in the fluid. The first pressure wave and the second pressure wave converge at the sensor.