Hoechst 34580 Stain Concentration for Malaria Detection
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Solution Overview
Problem
Existing methods for detecting malaria-infected red blood cells face challenges in distinguishing between infected and non-infected cells, particularly in specimens with high reticulocyte values or low malaria infection rates, due to overlapping fluorescence signals and reduced separation capacity.
Innovation Solution
The use of Hoechst 34580 as a fluorescent dye at a low concentration (between 0.15 μM and 1.0 μM) in a blood analyzing method and stain solution, combined with a diluent, to improve the separation capacity between malaria-infected and non-infected red blood cells by optimizing fluorescence intensity and signal discrimination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high concentration of fluorescent dye (Hoechst 34580) is used, then fluorescence intensity is enhanced, but separation capacity between malaria-infected and non-infected red blood cells deteriorates
Solution Approach 1:
The patent applies parameter changes by optimizing the concentration of the fluorescent dye Hoechst 34580 to a specific range (0.15-1.0 μM) rather than using high concentrations. This parameter optimization resolves the contradiction by finding the optimal balance point where sufficient fluorescence intensity is achieved while maintaining good separation capacity between infected and non-infected red blood cells, as demonstrated in the Examples section
2Reliability
If conventional fluorescent dye concentration is used, then detection is possible, but discrimination between malaria-infected and non-infected cells is difficult in low infection rate specimens
Solution Approach 1:
The patent changes the concentration parameter of the fluorescent dye to a low concentration range (0.15-1.0 μM), which improves the discrimination accuracy in low infection rate specimens. This parameter change enhances the reliability of detection while maintaining high discrimination accuracy, as confirmed by the experimental results in the Examples section showing improved separation capacity
3Adaptability or versatility
If high reticulocyte value specimens are analyzed, then blood analysis is performed, but overlap between malaria-infected cells and other particles occurs
Solution Approach 1:
The patent applies parameter changes by using a low concentration of fluorescent dye (0.15-1.0 μM) that specifically enhances the separation capacity in challenging specimens with high reticulocyte values. This optimized parameter setting allows the system to maintain high analysis capability while achieving precise separation between malaria-infected cells and other particles, as demonstrated in the Examples
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 enhances the detection accuracy of malaria-infected red blood cells by improving the separation capacity between infected and non-infected cells, even in challenging specimen conditions, allowing for more precise classification on scattergrams.
Implementation Method 1
acquiring fluorescence information obtained by irradiating the measurement sample with light
Data Source
AI summary
Disclosed is a blood analyzing method including: a step of preparing a measurement sample from blood, a fluorescent dye represented by the following formula 1, and a diluent, a concentration of the fluorescent dye in the measurement sample being greater than or equal to 0.15 μM and smaller than or equal to 1.0 μM; a step of acquiring fluorescence information obtained by irradiating the measurement sample with light; and a step of detecting a red blood cell infected with a malaria parasite in the blood based on the fluorescence information.