Sysmex Corporation

Ayumu Yoshida

Shinichiro Oguni

Tomohiro Tsuji

Yuji Itose

Masaki Abe

Kinya Uchihashi

Aya Konishi

Yukiko Kataoka

Hideaki Matsumoto

Tatsuya Narikawa

Saori Suzuki

Toshihiro Mizukami

Jo Linssen

Keiko Moriyama

Shimeru Kamihira

Hiromitsu Iizuka

Jo Joachim Louisa Maria Linssen

Sinichiro Oguni

A blood analyzer comprising: a specimen preparation section for preparing a measurement specimen that is used to measure a white blood cell count among CBC measurement items; a measurement section for obtaining optical information from blood cells contained in the measurement specimen; and a controller carrying out operations comprising: classifying blood cells contained in the measurement specimen into at least white blood cells and blood cells suspected to be abnormal blood cells based on the optical information; obtaining distribution data of the white blood cells and distribution data of the blood cells suspected to be abnormal blood cells; counting the white blood cells based on the distribution data of the white blood cells; and determining presence or absence of the abnormal blood cells in the blood sample, based on the distribution data of the blood cells suspected to be abnormal blood cells. A blood analyzing method and a computer program product are also disclosed.

Blood analyzer, blood analyzing method, and computer program product

This blood analyzer includes a sample preparation portion preparing a first measurement sample containing a blood sample and a hemolytic agent and a second measurement sample containing the blood sample, the same hemolytic agent as the hemolytic agent and a staining agent and a control portion classifying white blood cells in the first measurement sample into at least four groups of monocytes, neutrophils, eosinophils and others on the basis of fluorescent information and two types of scattered light information generated by a light information generation portion and classifying blood cells in the second measurement sample into at least malaria-infected red blood cells and others on the basis of fluorescent information and scattered light information generated by the light information generation portion.

Blood analyzer, blood analysis method, hemolytic agent and staining agent

The present invention provides a reagent for analysis of immature leukocytes comprising: 

Reagent and reagent kit for analysis of immature leukocyte

A blood analyzer, a blood analysis method, and a computer program product that can distinguishably detect abnormal lymphocytes, blasts, and atypical lymphocytes are provided. A blood analyzer prepares a first measurement sample from a first reagent containing a hemolyzing agent, a second reagent containing a fluorescence staining dye, and the blood specimen, and prepares a second measurement sample from a third reagent containing a hemolyzing agent, a fourth reagent containing a fluorescence staining dye, and the blood specimen. The blood analyzer measures each of the measurement samples, and distinguishably detects abnormal lymphocytes, blasts, and atypical lymphocytes in a blood specimen based on the measurement data.

Blood analyzer, blood analysis method, and computer program product

The present invention provides a reagent kit for analyzing a sample comprising a first reagent containing a cationic surfactant, a nonionic surfactant and an aromatic carboxylic acid and a second reagent containing a fluorescent dye capable of staining nucleic acid, and a method for analyzing a sample using the kit.

Reagent kit for sample analysis and sample analysis method

The present invention provides a reagent for analysis of immature leukocytes comprising:

A measuring method and a measuring apparatus which can classify and count myeloblast more precisely without influence of other component in a sample including platelet aggregation in measurement of a blood sample with a flowcytometry, wherein damage is given to a cell membrane of erythrocyte and mature leukocyte contained in a hematological sample, a hemocyte in which a cell membrane is damaged is constricted, and this is dyeing-treated with a fluorescent dye which can stain a nucleic acid to obtain a sample, the sample is measured with a flowcytometer, and a cell contained in a first cell group containing myeloblast, which is specified based on forward scattered light information and side scattered light information, and contained in a second cell group containing myeloblast, which is specified based on forward scattered light information and fluorescent information, is counted as myeloblast.

Method and apparatus for measuring hematological sample

A reagent for analyzing immature leukocyte capable of analyzing accurately immature leukocyte such as myeloblast and immature granulocyte, and mature leukocyte, which reagent has broader allowable range of sample processing conditions than conventional ones, and a reagent kit are provided. The present invention relates to a reagent for analyzing immature leukocyte containing a surfactant for giving damage to cell membrane of red blood cell and mature leukocyte in the sample, a solubilizing agent for causing contraction to damaged blood cell, sugar, a dye for staining nucleic acid.

Reagent for immature leukocyte analysis and reagent kit

A B-lymphocyte classifying method includes the steps of (1) preparing a measurement sample by mixing a blood sample with a lysing reagent to lyse erythrocytes and to shrink the B-lymphocytes in the blood sample, (2) letting the measurement sample flow through a flow cell of a flow cytometer, (3) radiating a light beam onto a cell in the measurement sample that is flowing through the flow cell, (4) detecting at least two scattered light emitted from the irradiated cell, (5) specifying a region of a B-lymphocyte cluster in accordance with the detected scattered light, and (6) counting the number of B-lymphocytes in the specified region.

Method and apparatus for classifying B-lymphocytes

A reagent for partially lysing a cell membrane of a red blood cell infected with a malaria parasite, comprising: a first surfactant which has predetermined lysing ability for the red blood cell membrane; and a second surfactant which has weaker lysing ability than that of the first surfactant; wherein the reagent has pH of 5 to 7 and osmotic pressure of 200 to 300 mOsm/kg&#xb7;HO; and wherein the reagent partially lyses the malaria infected red blood cell membrane such that a malaria parasite is retained in the red blood cell and fluorescent dye passes through the cell membrane, is disclosed. A reagent for detecting malaria infected red blood cells, and a sample analyzing method for detecting malaria infected red blood cells, are also disclosed.

Reagent for partially lysing a cell membrane of a red blood cell, a reagent for detecting malaria infected red blood cells, and a sample analyzing method for detecting malaria infected red blood cells

Growing community of inventors

Kobe, Japan

Ayumu Yoshida