Microfluidic Allergy Test via Direct Optical Granule Observation
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Solution Overview
Problem
Current allergy tests based on antibody detection of IgE have high rates of false positive and false negative results, and are indirect, making them unreliable and potentially risky, especially with challenge tests.
Innovation Solution
A process and device using a microscope to directly observe degranulation of immunocytes in a microfluidic chip, allowing for direct and optical observation of allergic reactions by visualizing granule movement, which serves as a more reliable method for determining allergies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If antibody-based detection of IgE is used to determine allergy, then the test can be performed indirectly through blood sample analysis, but the reliability of the test result deteriorates due to high rates of false positive and false negative interpretations
Solution Approach 1:
The patent replaces the biochemical/chemical detection system (antibody-based IgE detection) with a direct optical observation system using light microscopy. Instead of using enzyme-labeled antibodies and fluorescence development reactions, the invention directly visualizes degranulation events in immunocytes, substituting indirect chemical markers with direct optical detection of cellular responses.
Solution Approach 2:
The patent introduces an optical intermediary system comprising a light source, optical path, and microscope for visualizing degranulation. This intermediary optical system enables direct observation of granule release from immunocytes, serving as a mediator between the biological sample and the detection process, eliminating the need for antibody-based chemical intermediaries.
2Ease of operation
If indirect allergy indicators such as IgE antibodies or fluorescence are used, then the allergic reaction can be detected indirectly, but the measurement precision deteriorates leading to misinterpretation of test results
Solution Approach 1:
The patent replaces indirect biochemical detection systems with direct optical visualization. Instead of measuring IgE antibody levels through enzyme-linked immunosorbent assays or fluorescence-based methods, the invention directly observes degranulation events in real-time using light microscopy, substituting indirect chemical measurements with direct visual detection of cellular responses.
Solution Approach 2:
The patent creates an optical copy or visual representation of the degranulation process by capturing images or video of granule release from immunocytes. This optical copying allows direct visualization and documentation of the allergic response without requiring indirect biochemical markers, enabling precise measurement of the actual cellular response.
3Measurement precision
If challenge tests are performed to confirm allergy and identify false test results, then the accuracy of allergy determination can be improved, but the harmful factors increase due to the risk of life-threatening anaphylactic shock
Solution Approach 1:
The patent performs preliminary observation of degranulation responses in vitro using small blood samples before any potential in vivo challenge. By directly visualizing immunocyte degranulation in response to allergens in a controlled laboratory setting, the method provides preliminary confirmation of allergy status without exposing the patient to the risks of challenge tests, thereby preventing harmful outcomes while maintaining diagnostic accuracy.
Solution Approach 2:
The patent provides beforehand cushioning against the risks of challenge tests by offering a safe alternative method for allergy confirmation. The direct optical observation of degranulation in vitro serves as a protective measure that eliminates the need for risky in vivo challenge tests, cushioning patients from potential anaphylactic shock while still providing definitive allergy diagnosis.
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
This approach provides a more accurate, rapid, and cost-effective allergy test by directly observing degranulation, reducing the need for indirect markers and minimizing the risk of misinterpretation, while allowing for real-time determination of allergic sensitization.
Implementation Method 1
the position of granules is observed by means of the microscope, wherein the granules are observed in different planes or in different horizontal planes
Implementation Method 2
direct and/or optical observation of an allergic reaction or for the observation of the absence of an allergic reaction
Data Source
AI summary
A process for carrying out an allergy test is based on a blood sample being taken. The blood sample is contacted in vitro with at least one allergen. At least one allergic reaction or the absence of the at least one allergic reaction is observed via a microscope (11) directly and/or optically. To make it possible to carry out an allergy test with a higher validity and/or better accuracy, a position of granules is observed via the microscope (11). The granules are observed in different planes or horizontal planes.