Dual-Channel Blood Cell Analysis for Lymphocyte Count Correction
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Solution Overview
Problem
Existing white blood cell differential methods, particularly using the DIFF channel, suffer from inaccurate lymphocyte and neutrophil differentiation due to unclear boundaries, leading to erroneous clinical diagnoses.
Innovation Solution
A sample analysis apparatus and method utilizing two channels, DIFF and WNB, employing laser light scattering and fluorescence to generate scattergrams, allowing for accurate lymphocyte differentiation by correcting the lymphocyte result in the DIFF channel based on the WNB channel's results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single DIFF channel is used for white blood cell differential, then the device complexity is reduced, but the measurement precision of lymphocyte differentiation deteriorates due to unclear boundaries
Solution Approach 1:
The invention divides the white blood cell analysis into two separate channels: DIFF channel for initial four-part differential and WNB channel for nucleated red blood cell detection and lymphocyte verification. This segmentation allows each channel to specialize in specific cell type detection, resolving the boundary confusion between lymphocytes and neutrophils that occurs in a single-channel system.
Solution Approach 2:
The WNB channel acts as an intermediary verification system for lymphocyte detection. When lymphocyte boundaries are unclear in the DIFF channel, the WNB channel provides additional light signal data (forward-scattered light, side-scattered light, and fluorescence) to confirm lymphocyte identity, particularly for nucleated red blood cells that may be misidentified.
2Measurement precision
If the WNB channel is used to correct lymphocyte results, then the measurement precision improves, but the device complexity increases due to dual-channel requirement
Solution Approach 1:
The WNB channel is designed with multi-functionality: it detects nucleated red blood cells, provides verification for lymphocyte identification, and contributes to the overall white blood cell differential. This universal design justifies the additional channel by making it serve multiple purposes rather than a single correction function, thereby reducing the perceived complexity burden.
Solution Approach 2:
The system implements feedback by using WNB channel results to correct and verify DIFF channel lymphocyte measurements. The processor compares light signals from both channels and adjusts the final lymphocyte count based on WNB verification, creating a self-correcting measurement system that improves precision despite added complexity.
3Measurement precision
If light signal parameters are increased for better cell differentiation, then the measurement precision improves, but the use of energy increases
Solution Approach 1:
The system applies partial action by selectively using three types of light signals (forward-scattered light, side-scattered light, and fluorescence) only when needed for difficult differentiations. Not all cell types require full spectral analysis, allowing energy conservation while maintaining precision where it matters most - at cell boundary ambiguities.
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
Improves the accuracy of white blood cell differential analysis by clearly differentiating lymphocytes from neutrophils, ensuring precise clinical diagnosis.
Implementation Method 1
obtain a light signal generated after the first test sample is irradiated with light; obtain a light signal generated after the second test sample is irradiated with light
Implementation Method 2
obtain a light signal generated after the first test sample is irradiated with light; obtain a light signal generated after the second test sample is irradiated with light
Data Source
AI summary
Disclosed are a sample analysis apparatus and method which include: obtaining a first light signal by irradiating a first test sample from blood and a first-channel reagent to differentiate neutrophils, eosinophils, lymphocytes, and monocytes; obtaining a second light signal from a second test sample from the blood and a second-channel reagent; counting the nucleated red blood cells and lymphocytes based on the second light signal; determining accuracy of the lymphocyte result from the first test sample; and if inaccurate, correcting the lymphocyte result based on the lymphocyte result of the second test sample.