Basophil Analysis Using Fluorescent Dye and Light Scatter
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Solution Overview
Problem
Current methods for analyzing blood samples to identify and quantify basophils are inefficient due to low concentrations, similarity in optical scattering characteristics with lymphocytes, and high costs associated with manual review and flow cytometry, leading to inaccurate and costly basophil identification.
Innovation Solution
A method using a hematology analyzer with a cell membrane permeable fluorescent dye for staining, combined with light scatter and fluorescence measurements to distinguish basophils from other white blood cell sub-populations, employing Multiple Angle Polarized Scattering Separation technology and fluorescence triggering to separate nuclei-containing events, allowing for accurate and reliable identification and quantification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual review of microscope slides is used to identify and count basophils, then precision and accuracy can be improved, but the cost of labor and time consumption increase significantly
Solution Approach 1:
The patent replaces manual mechanical review of microscope slides with an automated optical system that uses light scatter signals and fluorescence emission to identify and count basophils. The hematology analyzer automatically processes blood samples, eliminating the need for manual slide review by medical technologists while maintaining identification accuracy through multi-parameter optical analysis.
Solution Approach 2:
The patent introduces fluorescent dyes as intermediary substances that bind to basophil-specific surface antigens. These dyes serve as mediators between the basophils and the detection system, enabling automated identification through fluorescence emission signals that are distinct from other white blood cell types, thus resolving the complexity of manual differentiation.
2Measurement precision
If flow cytometry analysis with antibodies is used to detect basophils, then sensitivity and specificity are improved, but the cost, sample preparation time, and requirement for certified technologists increase
Solution Approach 1:
The patent changes the detection parameter from complex antibody-antigen interactions requiring flow cytometry to simpler fluorescence emission measurements. By using cell membrane permeable fluorescent dyes that can be rapidly incorporated into basophils, the system achieves high sensitivity without the lengthy sample preparation and measurement protocols required by traditional flow cytometry methods.
Solution Approach 2:
The patent employs inexpensive fluorescent dyes as disposable staining reagents that can be rapidly applied and discarded, replacing expensive and complex antibody reagents. These short-lived fluorescent markers provide sufficient detection sensitivity for basophil identification without requiring the certified technologist expertise needed for flow cytometry antibody assays.
3Productivity
If automated hematology analyzers use traditional methods to estimate basophils, then the analysis speed is maintained under one minute, but the accuracy decreases due to misidentification with lymphocytes
Solution Approach 1:
The patent adds the fluorescence emission dimension to the traditional light scatter analysis. By measuring both light scatter signals and fluorescence emission from basophil-specific fluorescent markers, the system creates a multi-dimensional parameter space that clearly separates basophils from lymphocytes, eliminating misidentification while maintaining rapid automated analysis speed.
Solution Approach 2:
The patent applies fluorescent staining specifically to basophil surface antigens, creating a localized fluorescent signal that is unique to basophils. This local quality enhancement allows the automated analyzer to quickly distinguish basophils from other white blood cells based on their specific fluorescent characteristics without compromising analysis speed.
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 method enables accurate and efficient basophil identification and quantification in under a minute, reducing costs and improving precision by using a single reagent to differentiate basophils from other WBC sub-populations, with excellent correlation to reference flow cytometry results.
Implementation Method 1
a cell membrane permeable fluorescent dye for staining
Implementation Method 2
nucleic acid binding fluorescent dye
Implementation Method 3
light scatter and fluorescence measurements
Implementation Method 4
Multiple Angle Polarized Scattering Separation technology
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
Provided herein are systems and methods for analyzing blood samples, and more specifically for performing a basophil analysis. In one embodiment, the systems and methods include: (a) staining a blood sample with an exclusive cell membrane permeable fluorescent dye; and then (b) using measurements of light scatter and fluorescence emission to distinguish basophils from other WBC sub-populations. In one embodiment, the systems and methods include performing a basophil cluster analysis of the blood sample, based on the combination of light scatter and fluorescence measurements.