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CHAPTER 11
Technical Information
11-12
Sysmex XE-5000 Instructions for Use
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Flow cytometry method using semiconductor laser
Cytometry is used to analyze physiological and chemical
characteristics of cells and other biological particles. Flow
cytometry is used to analyze those cells and particles as they
are passed through extremely small and sensitive detecting
zones. Fluorescence Flow Cytometry uses light emission
from stained proteins (RNA&DNA) in order to separate cell
populations through scattergram analysis programs.
A blood sample is aspirated and measured, diluted to the
specified ratio and stained. The sample is then fed into the
flow cell.
This Hydro Dynamic Focusing mechanism improves cell
count accuracy, reproducibility and linearity. And since the
blood cell particles pass in a line through the center of the
flow cell, the generation of artificial blood pulses is prevented
and flow cell contamination is reduced.
A semiconductor laser beam is emitted to the blood cells
passing through the flow cell. The forward scattered light is
received by the photodiode, and the lateral scattered light and
lateral fluorescent light are received by the photomultiplier
tubes. This light is converted into electrical pulses, making it
possible to perform detailed scattergram analysis.
(1) Forward scattered light and lateral scattered light
When blood cells pass the light-beam, the light scatters from
each cell in various directions. This phenomenon is called
light scattering. By detecting the scattered light, it is possible
to obtain information on cell size and cell surface structure.
The intensity of the scattered light depends on factors such as
the particle diameter and viewing angle. This instrument
detects forward scattered light, which provides information on
blood cell size and lateral scattered light, which provides
information on the cell complexity.
Blood cell
Sheath
reagent
Flow cell
Sample nozzle
Microprocessor
Photodiode
Pinhole
Lateral fluorescent
light lens
Dichroic
mirror
Beam stopper
Pinhole
Optical filter
Photomultiplier tube
Sheath flow cell
Sample
nozzle
Lateral fluorescent
light data
Forward scattered
light condensing lens
Lateral scattered
light data
Condenser
lens
Semiconductor
laser beam
Forward scattered
light data
Photomultiplier
tube
Photomultiplier
tube
Summary of Contents for XE-5000
Page 2: ......
Page 54: ...CHAPTER 5 Before Using 5 4 Sysmex XE 5000 Instructions for Use Revised April 2007 Blank page ...
Page 96: ...CHAPTER 6 Operation 6 42 Sysmex XE 5000 Instructions for Use Revised April 2007 Blank page ...
Page 128: ...CHAPTER 8 Calibration 8 10 Sysmex XE 5000 Instructions for Use Revised April 2007 Blank page ...
Page 258: ...CHAPTER 12 Warranty 12 2 Sysmex XE 5000 Instructions for Use Revised April 2007 Blank page ...
Page 262: ...CHAPTER 13 Index Revised April 2007 13 4 Sysmex XE 5000 Instructions for Use Blank page ...