Microfluidic Device Neck Portion Capillary Flow Control
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Solution Overview
Problem
Current methods for medical pathological inspections require significant manual effort, are time-consuming, and often result in errors, necessitating the development of automated and efficient systems for sample analysis.
Innovation Solution
A microfluidic device with a sample chamber design that includes an introduction portion, accommodation portion, and neck portion to control sample flow, along with an analysis unit for centrifugal separation and reaction, allowing for accurate and quick analysis of samples using centrifugal force and photodetection for sample loading verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual operations are used for sample loading and analysis, then flexibility and adaptability are maintained, but time consumption increases and error rates rise
Solution Approach 1:
The microfluidic device performs sample loading, separation, and analysis automatically through integrated centrifugal force-driven fluid transport and on-chip reaction chambers, eliminating manual operations and enabling self-service functionality that reduces both time consumption and human error
Solution Approach 2:
The device merges multiple functions (sample loading, centrifugal separation, reagent mixing, and analysis) into a single integrated microfluidic platform, allowing simultaneous performance of multiple inspection tasks that improves both productivity and reliability
2Measurement precision
If large automation equipment is used for medical pathological inspections, then analysis accuracy is improved, but device size and cost increase
Solution Approach 1:
The patent replaces large mechanical automation equipment with a miniaturized microfluidic system that uses centrifugal force and capillary action to achieve precise sample handling and analysis, maintaining measurement precision while dramatically reducing device size and complexity
Solution Approach 2:
The analysis system is segmented into discrete microfluidic components (sample chamber, separation chamber, reaction chambers) that can be integrated into a compact format, enabling high-precision analysis without requiring large-scale equipment
3Loss of time
If manual sample loading is performed, then adaptability to different samples is maintained, but time consumption and labor requirements increase
Solution Approach 1:
The microfluidic device automatically performs sample loading through its integrated architecture, where centrifugal force drives fluid movement from the sample chamber through separation and into reaction chambers without requiring manual intervention, significantly reducing both turnaround time and manual effort
Solution Approach 2:
Reagents are pre-loaded into reaction chambers before sample analysis, and the device is designed with pre-configured fluid pathways that enable automatic sample processing upon activation, eliminating the need for manual sample loading and reducing operational complexity
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 microfluidic device enables rapid, accurate, and automated analysis of samples, reducing manual errors and time, and providing quick inspection results, suitable for emergency diagnostics.
Implementation Method 1
a neck portion forming a boundary between the introduction portion and the accommodation portion and forming a capillary pressure for controlling flow of the sample between the introduction portion and the accommodation portion
Implementation Method 2
when blood is loaded into a disc-shaped microfluidic device and the microfluidic device is rotated, serum separation occurs due to a centrifugal force
Data Source
AI summary
Provided is a microfluidic device. The microfluidic device includes a sample chamber in which a sample is accommodated. The sample chamber includes: an introduction portion including a loading hole through which the sample is loaded; an accommodation portion including a discharge hole; and a neck portion forming a boundary between the introduction portion and the accommodation portion. The neck portion provides a capillary pressure for controlling flow of the sample between the introduction portion and the accommodation portion.