Looped Microfluidic Channels for Label-Free Infected Cell Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current pathogen detection methods are time-consuming, require expensive and bulky equipment, and skilled technicians, and struggle to detect intracellular bacteria, leading to false negatives and antibiotic resistance, especially in early infection stages.
Innovation Solution
A microfluidic device with a looped microchannel and multiple outlets that uses inertial focusing to separate infected cells, such as phagocytic cells with internalized microbes, from uninfected cells based on differences in cell stiffness and deformability, without the need for labels or complex equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional pathogen detection methods (colony culture or genetic sequencing) are used, then detection accuracy is improved, but detection time increases significantly and equipment complexity increases
Solution Approach 1:
The invention extracts and detects intracellular bacteria directly from phagocytic cells using flow cytometry, bypassing the need for time-consuming colony culture or complex genetic sequencing. By focusing on detecting bacteria within phagocytes rather than using traditional culture methods, the system achieves rapid detection (within hours) while maintaining high accuracy.
Solution Approach 2:
The invention replaces complex genetic sequencing equipment and manual microscopic examination with flow cytometry technology. Flow cytometry uses optical principles to detect and analyze cells in fluid, providing rapid automated detection without requiring bulky equipment or highly skilled technicians, thus reducing both detection time and equipment complexity while maintaining detection accuracy.
2Productivity
If flow cytometry is used for detecting infected phagocytes, then detection speed is improved, but device complexity and cost increase
Solution Approach 1:
The invention uses flow cytometry technology that can detect multiple parameters simultaneously (cell size, granularity, fluorescence) to identify infected phagocytes. This multi-functional capability allows rapid detection of intracellular bacteria through various markers, achieving high detection speed while the standardized nature of flow cytometry helps control device complexity through established protocols and instrumentation.
3Measurement precision
If labeling methods are used to identify desired cells, then cell identification accuracy is improved, but cell integrity is compromised
Solution Approach 1:
The invention uses fluorescent labeling where antibodies conjugated to fluorescent dyes bind to specific cell surface markers or intracellular bacteria. The fluorescent properties allow optical detection and identification of infected phagocytes without physically altering or damaging the cells. The labeling is non-invasive and preserves cell integrity while enabling accurate identification through fluorescence-activated cell sorting or detection.
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 rapid, cost-effective, and label-free detection of early infections by differentiating infected cells from uninfected cells, allowing for timely and targeted treatment, especially in patients with immunodeficiencies or high infection risk.
Implementation Method 1
A microfluidic device with a looped microchannel and multiple outlets that uses inertial focusing to separate infected cells, such as phagocytic cells with internalized microbes, from uninfected cells based on differences in cell stiffness and deformability
Data Source
AI summary
A microfluidic device containing an inlet, a microchannel in fluid communication with the inlet, and a plurality of outlets in fluid communication with the microchannel. The microchannel contains a loop; or from about 1 loop to about 50 loops; or from about 2 loops to about 25 loops; or from about 5 loops to about 15 loops. A method for detecting an infected cell may employ the microfluidic device.