Point-of-Care Test Strip for Simultaneous G6PD and Hemoglobin Detection
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Solution Overview
Problem
Current diagnostic tools are inadequate for identifying individuals with glucose-6-phosphate dehydrogenase (G6PD) deficiency, which poses a risk during primaquine treatment for malaria, particularly in rural areas affected by Plasmodium vivax, leading to untreated infections and potential mortality.
Innovation Solution
A test strip and diagnostic kit that simultaneously determine G6PD and hemoglobin levels in a biological sample using a combination of membrane layers and reagents, allowing for colorimetric analysis and quantitative determination, enabling point-of-care monitoring with a fingerstick sample.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current diagnostic tools are used to identify G6PD deficiency, then screening accuracy may be maintained, but the complexity and cost of screening increases significantly, making it impractical for widespread use in rural areas
Solution Approach 1:
The patent combines G6PD enzyme activity testing and hemoglobin level measurement into a single test strip with multiple reaction zones. The test strip simultaneously performs both functions using different reagent layers, eliminating the need for separate tests and reducing overall screening complexity while maintaining diagnostic accuracy for both parameters.
Solution Approach 2:
The test strip is designed as a multi-functional diagnostic tool that can detect multiple conditions (G6PD deficiency and hemoglobin levels) from a single blood sample. This universal approach allows one device to replace multiple specialized tests, making screening more accessible in resource-limited settings.
2Measurement precision
If traditional laboratory-based G6PD testing is performed, then diagnostic accuracy is maintained, but the time required for results increases significantly
Solution Approach 1:
The test strip divides the diagnostic process into separate functional zones: a first reaction zone for G6PD enzyme activity detection and a second reaction zone for hemoglobin measurement. Each zone contains specific reagents that react with the blood sample independently, allowing parallel processing of multiple tests and rapid simultaneous results without requiring sequential laboratory procedures.
Solution Approach 2:
The test strip is designed as a self-contained diagnostic system that requires minimal external equipment or expertise to operate. The reagents are pre-loaded on the strip, and results are generated automatically through colorimetric changes that can be read visually or with simple equipment, eliminating the need for complex laboratory infrastructure and enabling rapid point-of-care testing.
3Ease of operation
If G6PD screening is not performed before primaquine treatment, then treatment access is improved, but the risk of severe hemolytic anemia increases in G6PD deficient patients
Solution Approach 1:
The test strip enables preliminary screening for G6PD deficiency and hemoglobin levels before primaquine treatment is administered. By performing quick point-of-care tests prior to treatment, clinicians can identify at-risk patients and adjust dosing or select alternative therapies, preventing severe hemolytic anemia while maintaining treatment accessibility for those who can safely receive primaquine.
4Productivity
If a point-of-care test strip is developed for G6PD testing, then testing speed and accessibility are improved, but the manufacturing precision requirements increase
Solution Approach 1:
The test strip incorporates different reagent layers with specific properties optimized for their respective functions. The first reaction zone contains enzymes and substrates tailored for G6PD detection, while the second zone contains reagents for hemoglobin measurement. Each zone is manufactured with precise local characteristics, but the overall design uses standardized production techniques that balance manufacturing precision requirements with rapid testing capabilities.
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 kit provides rapid, accurate, and easy-to-perform testing for G6PD and hemoglobin levels, enabling identification of individuals who can tolerate or cannot tolerate primaquine treatment, thereby facilitating appropriate malaria therapy and reducing transmission risks.
Implementation Method 1
quantitatively determined colorimetrically
Implementation Method 2
G6PDH, which is either absent, insufficiently present, or in excess
Implementation Method 3
using, for example, a reflectance-based reader
Data Source
AI summary
Devices, kits, and assays are provided for the testing and monitoring of hemoglobin, anemia, glucose-6-phoshate dehydrogenase, and glucose-6-phosphate dehydrogenase deficiency in an individual.