Microfluidic Wedge Chamber for Field Mastitis Detection
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Solution Overview
Problem
Current methods for diagnosing subclinical mastitis in cows, such as the Somatic Cell Count (SCC), are impractical for field use due to high costs and variability, and existing wedge chamber designs for leukocyte differential assays are cumbersome and prone to leaks or improper liquid placement.
Innovation Solution
A novel microfluidic wedge chamber assembly with an adhesive-backed film securing the wedge top to the base, forming a stable wedge-shaped chamber for easy liquid addition and minimizing movement, allowing for accurate and quick leukocyte differential assays using small milk volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional SCC methods are used for diagnosing subclinical mastitis, then diagnostic accuracy is maintained, but field usability deteriorates due to high costs and variability
Solution Approach 1:
The patent employs a disposable microfluidic chamber assembly that can be discarded after a single use. This eliminates the need for expensive, complex laboratory equipment while maintaining diagnostic accuracy. The disposable nature ensures consistency across different field users without requiring extensive training or calibration, directly addressing the contradiction between maintaining measurement precision and improving ease of operation in field settings.
2Adaptability or versatility
If existing wedge chamber designs are used for leukocyte differential assays, then assay capability is provided, but reliability deteriorates due to leaks and improper liquid placement
Solution Approach 1:
The patent utilizes a thin film adhesive layer to seal the wedge-shaped chamber, creating a flexible yet reliable barrier that prevents leaks. This thin film approach maintains the wedge chamber's assay capability while significantly improving reliability by eliminating the leakage and improper liquid placement issues associated with rigid, traditional chamber designs. The flexible seal adapts to the chamber geometry, ensuring consistent performance.
3Measurement precision
If manual leukocyte differential methods are used, then diagnostic accuracy is maintained, but productivity deteriorates due to time consumption and training requirements
Solution Approach 1:
The microfluidic chamber assembly is designed to guide liquid addition and distribution automatically through its wedge geometry and capillary action, eliminating the need for manual manipulation and extensive technician training. The chamber self-regulates liquid flow and positioning, maintaining diagnostic accuracy while dramatically improving productivity by enabling rapid testing without requiring highly trained personnel or time-consuming manual procedures.
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 wedge chamber enables rapid, accurate, and quantitative leukocyte differential analysis, making it suitable for field use by farmers, with results comparable to manual methods and reducing the need for extensive training or expensive equipment.
Implementation Method 1
an adhesive-backed film securing the wedge top to the base
Data Source
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AI summary
The present invention relates to a device and method for the detection of mastitis or other disease from a body fluid of a mammal for example from cow's milk. The device and method relates to a wedge microfluidic chamber for using a minimal amount of fluid and being able to use the device to observe leukocytes in a mono-layer for the purpose of disease detection, cell counts or the like.