Microfluidic Chip Parallel Microconstrictions High-Throughput Cell Deformability
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Solution Overview
Problem
Current methods for measuring cell deformability, such as atomic force microscopy and microfluidic deformability cytometry, face challenges including low throughput, high costs, and complexity, limiting their application in clinical and industrial settings.
Innovation Solution
A microfluidic chip with parallelized microconstrictions and a computational framework using machine learning algorithms for high-speed image processing and cell tracking, enabling simultaneous deformation measurement of multiple cells and reducing operational costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods (atomic force microscopy, micro-aspiration, optical stretching) are used for deformability measurement, then measurement precision is maintained, but throughput is low
Solution Approach 1:
The system segments the measurement process by placing multiple microconstrictions (at least 10, preferably 20-50) in parallel within a single field of view, allowing simultaneous deformation measurement of multiple cells. This segmentation enables high-throughput measurement while maintaining precision through parallel independent measurement channels.
Solution Approach 2:
The invention transitions from sequential single-cell measurement to parallel multi-cell measurement by adding the spatial dimension of multiple microconstrictions arranged in parallel. This dimensional change allows simultaneous measurement of multiple cells without compromising individual measurement precision.
2Productivity
If microfluidic deformability cytometry (xDC, sDC) is used to achieve high throughput, then productivity increases, but device complexity and cost increase due to expensive imaging equipment and sophisticated flow control
Solution Approach 1:
The invention extracts and eliminates the need for expensive high-speed cameras and complex flow control systems by using a simpler microconstriction-based design where cells are deformed as they pass through constricted channels, with deformation captured by standard imaging equipment at lower frame rates.
Solution Approach 2:
The system uses inexpensive microfluidic chips with integrated microconstrictions that can be easily fabricated and potentially disposed of, replacing expensive reusable imaging equipment and complex flow controllers. The microconstrictions themselves serve as single-use measurement elements.
3Device complexity
If constriction-based deformability cytometry (cDC) is used, then device complexity is reduced, but throughput is low
Solution Approach 1:
The system segments the single measurement path into multiple parallel microconstriction channels, allowing simultaneous measurement of multiple cells. This segmentation maintains the simplicity of constriction-based design while dramatically increasing throughput through parallel processing.
Solution Approach 2:
The invention merges multiple microconstriction channels into a single integrated microfluidic device with a unified field of view, combining the simplicity of cDC with the throughput capability of parallel processing. All microconstrictions are observed simultaneously by a single camera system.
4Productivity
If xDC and sDC are used for high-throughput measurement, then productivity increases, but ease of operation deteriorates due to requirement of very high frame rates (>2000 fps) and expensive high-speed cameras
Solution Approach 1:
The invention changes the critical parameter from frame rate (>2000 fps required for xDC/sDC) to a lower frame rate suitable for standard cameras, by using microconstrictions that create sufficient deformation at slower imaging speeds. This parameter change makes the system easier to operate with commercially available equipment.
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 high-throughput cell deformability measurement, improving efficiency and accuracy, and is suitable for clinical applications with reduced costs and simplified operation, capable of processing up to 25,000 cells per minute.
Implementation Method 1
a plurality of main channels disposed between the inlet and the outlet and provided with microconstrictions that are parallelized such that images of the cells are captured within a single field of view (FOV) when the cells pass through the microconstrictions and are deformed therein
Implementation Method 2
one or more bypass channels disposed between the inlet and the outlet and independent from the plurality of main channels, thereby stabilizing pressure drop between the inlet and the outlet
Data Source
AI summary
One embodiment includes a microfluidic chip for implementing cell deformability. The microfluidic chip comprises an inlet configured to receive cells, an outlet configured to output the cells, a plurality of main channels, and one or more bypass channels. The main channels are disposed between the inlet and the outlet and are provided with microconstrictions that are parallelized such that images of the cells are captured within a single field of view (FOV) when the cells pass through the microconstrictions and are deformed therein. The one or more bypass channels are independent from the main channels, thereby stabilizing pressure drop between the inlet and the outlet.