Particle analyzer classifying particles of various biological types using a correlation of measurements
First Claim
1. A particle analyzer comprising:
- a flow cell including first and second cells for containing electrolyte, the first and second cells being connected to each other by a pore to allow particles of various biological types to flow from the first cell to the second cell through the pore;
a first and second electrodes provided in the electrolyte in the first and second cells respectively;
first detecting means for detecting an electric resistance between the first and second electrodes which changes according as the particle passes through the pore to generate an electric resistance signal representative of the electric resistance;
a light source for emitting a beam of light to the flowing particle;
second detecting means for detecting scattered light from the particle receiving the beam of light to generate a scattered light signal representative of an intensity of the scattered light;
clock means for clocking a period of time during which the scattered light signal is generated; and
analysis means for classifying the particle as a particular type of the various biological types based on a correlation between the electric resistance signal and the clocked period of time.
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Accused Products
Abstract
A particle analyzer includes a flow cell including first and second cells for containing an electrolyte with various types of biological particles floating therein. The first and second cells are connected to each other by a pore to allow the particles to flow from the first cell to the second cell through the pore. A first and a second electrode are provided in the electrolyte in the first and second cells respectively. A first detector detects an electric resistance between the first and second electrodes which changes according as the particle passes through the pore to generate an electric resistance signal representative of the electric resistance. A light source emits a beam of light to the flowing particle and a second detector detects scattered light from the particle receiving the beam of light to generate a scattered light signal representative of an intensity of the scattered light. A clock device clocks a period of time during which the scattered light signal is generated. An analyzer classifies the particle as a particular type of biological particle based on a correlation between the electric resistance signal and the clocked period of time.
83 Citations
18 Claims
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1. A particle analyzer comprising:
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a flow cell including first and second cells for containing electrolyte, the first and second cells being connected to each other by a pore to allow particles of various biological types to flow from the first cell to the second cell through the pore; a first and second electrodes provided in the electrolyte in the first and second cells respectively; first detecting means for detecting an electric resistance between the first and second electrodes which changes according as the particle passes through the pore to generate an electric resistance signal representative of the electric resistance; a light source for emitting a beam of light to the flowing particle; second detecting means for detecting scattered light from the particle receiving the beam of light to generate a scattered light signal representative of an intensity of the scattered light; clock means for clocking a period of time during which the scattered light signal is generated; and analysis means for classifying the particle as a particular type of the various biological types based on a correlation between the electric resistance signal and the clocked period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A particle analyzer comprising:
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a flow cell including first and second cells for containing electrolyte, the first and second cells being connected to each other by a pore to allow particles of various biological types to flow from the first cell to the second cell through the pore; a light source for emitting a beam of light to the flowing particle; a detector for detecting scattered light from the particle receiving the beam of light to generate a scattered light signal representative of an intensity of the scattered light; comparison means for comparing the scattered light signal obtained by the detector with a first reference value as well as a second reference value larger than the first reference value; a clock for clocking a first period of time during which the scattered light signal is larger than the first reference value and a second period of time during which the scattered light signal is larger than the second reference value; and analysis means for classifying the particle based on a correlation between the first and second periods of time. - View Dependent Claims (9)
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10. A particle analyzer comprising:
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a flow cell including first and second cells for containing electrolyte, the first and second cells being connected to each other by a pore to allow particles of various biological types to flow from the first cell to the second cell through the pore; a light source for emitting a beam of light to the flowing particle; a first detector for detecting scattered light from the particle receiving the beam of light to generate a scattered light signal representative of an intensity of the scattered light; a clock for clocking a period of time during which the scattered light signal is generated; a second detector for detecting fluorescence from the particle receiving the beam of light to generate a fluorescence signal representative of an intensity of the fluorescence; a comparator for comparing the fluorescence signal means with a reference value; another clock for clocking another period of time during which the fluorescence signal is larger than the reference value; and analysis means for classifying the particle based on a correlation between the another clocked period of time and the scattered light signal generated period of time. - View Dependent Claims (11)
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12. A method for analyzing particles in an electrolyte comprising the steps of:
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connecting first and second cells for containing electrolyte to each other to allow particles of various types to flow from the first cell to the second cell; providing first and second electrodes in the electrolyte in the first and second cells respectively; detecting an electric resistance between the first and second electrodes which changes according as the particle passes through the pore to generate an electric resistance signal representative of the electric resistance; emitting a beam of light to the flowing particle; sensing scattered light from the particle receiving the beam of light to generate a scattered light signal representative of an intensity of the scattered light; clocking a period of time during which the scattered light signal is generated; and classifying the particle as a particular type of the various types based on a correlation between the electric resistance signal and the clocked period of time. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification