摘要:
The present invention describes semi- and fully-automated methods and reagents therefor for the assay and analysis of body fluid samples, particularly non-blood samples. The methods and reagents are especially useful for the assay and analysis of cerebrospinal fluid (CSF) samples. The reagent compositions sphere and fix all cells in the sample in suspension. Reported results can include red blood cell (RBC) and white blood cell (WBC) counts, WBC differential values, cell-by-cell volumes and dry-mass concentrations.
摘要:
Methods for characterizing and distinguishing reticulocytes and mature red blood cells use reagent compositions which include organic cationic dyes for staining the reticulocytes in the blood sample and buffer solutions for maintaining a pH of about 6 to about 9. The dyes may be the blue absorption dyes Oxazine 750 or New Methylene Blue. When a zwitterionic surfactant is included in the reagent composition for isovolumetric sphering of the reticulocytes and erythrocytes, and the reagent composition and whole blood sample mixture is passed through the sensing region of a flow cytometer, the light scattered and absorbed by each cell is measured, the erythrocytes can be distinguished from reticulocytes and the volume, hemoglobin concentration and the hemoglobin content of each reticulocyte or erythrocyte, and the mean cell volume, mean corpuscular hemoglobin concentration, and mean cell hemoglobin of the reticulocytes or erythrocytes are calculated from the measured cell-by-cell volume and hemoglobin concentration. One method also includes adjusting the measured absorption signals for pseudo-absorption.
摘要:
Methods for blood sample preparation using reagent compositions which include a zwitterionic surfactant for sphering of cells to eliminate orientational noise. When the reagent composition including a for staining a subset of cells is reacted with an anticoagulated blood sample, and the reaction mixture is passed through the sensing region of a flow cytometer, the light scattered and absorbed by each cell is measured, the stained cells can be distinguished from the unstained cells, and when the cells are reticulocytes and mature erythrocytes, respectively, the volume and hemoglobin concentration of each reticulocyte or erythrocyte, and the hemoglobin content, mean cell volume, mean corpuscular hemoglobin concentration, and mean cell hemoglobin of the reticulocytes or erythrocytes are calculated from the measured cell-by-cell volume and hemoglobin concentration.
摘要:
A reagent composition which includes organic cationic dyes for staining the reticulocytes in a blood sample and buffer solutions for maintaining a pH of about 6 to about 9 is provided. The dyes may be the blue absorption dyes Oxazine 750 or New Methylene Blue. A zwitterionic surfactant is included in the reagent composition for isovolumetric sphering of the reticulocytes and erythrocytes. The reagent composition and whole blood sample mixture are passed through the sensing region of a flow cytometer. The light scattered and absorbed by each cell is measured; the erythrocytes can be distinguished from reticulocytes and the volume, hemoglobin concentration and the hemoglobin content of each reticulocyte or erythrocyte, and the mean cell volume, mean corpuscular hemoglobin concentration, and mean cell hemoglobin of the reticulocytes or erythrocytes are calculated from the measured cell-by-cell volume and hemoglobin concentration.
摘要:
Methods for characterizing and distinguishing reticulocytes and mature red blood cells use reagent compositions which include an organic cationic dye for staining the reticulocytes in the blood sample and a buffer solution for maintaining a pH of about 6 to about 9. The dyes may be the red excitable fluorescent dye Oxazine 750, or the blue excitable fluorescent dyes Acridine Orange or derivatives of Acridine Orange. When a zwitterionic surfactant is included in the reagent composition for isovolumetric sphering of the reticulocytes and erythrocytes, and the reagent composition and whole blood sample mixture is passed through the sensing region of a flow cytometer, the light scattered through at least one angular interval and that fluoresced by each cell is measured, the erythrocytes can be distinguished from reticulocytes and the volume, hemoglobin concentration and the hemoglobin content of each reticulocyte or erythrocyte, and the mean cell volume, mean corpuscular hemoglobin concentration, and mean cell hemoglobin of the reticulocytes and/or erythrocytes are calculated from the measured cell-by-cell volume and hemoglobin concentration.
摘要:
Methods for blood sample preparation using reagent compositions which include a zwitterionic surfactant for sphering of cells to eliminate orientational noise. When the reagent composition including a dye for staining a subset of cells is reacted with a blood sample, and the reaction mixture is passed through the sensing region of a flow cytometer, the light scattered and absorbed by each cell is measured, the stained cells can be distinguished from the unstained cells, and when the cells are reticulocytes and mature erythrocytes, respectively, the volume and hemoglobin concentration of each reticulocyte or erythrocyte, and the hemoglobin content, mean cell volume, mean corpuscular hemoglobin concentration, and mean cell hemoglobin of the reticulocytes or erythrocytes are calculated from the measured cell-by-cell volume and hemoglobin concentration.
摘要:
A reagent composition which include an organic cationic dye for staining the reticulocytes in the blood sample and a buffer solution for maintaining a pH of about 6 to about 9 is provided. The dyes may be the red excitable fluorescent dye Oxazine 750, or the blue excitable fluorescent dyes Acridine Orange or derivatives of Acridine Orange. A zwitterionic surfactant is included in the reagent composition for isovolumetric sphering of the reticulocytes and erythrocytes. The reagent composition and whole blood sample mixture is passed through the sensing region of a flow cytometer, the light scattered through at least one angular interval and that fluoresced by each cell is measured, the erythrocytes can be distinguished from reticulocytes and the volume, hemoglobin concentration and the hemoglobin content of each reticulocyte or erythrocyte, and the mean cell volume, mean corpuscular hemoglobin concentration, and mean cell hemoglobin of the reticulocytes and/or erythrocytes are calculated from the measured cell-by-cell volume and hemoglobin concentration.
摘要:
The invention provides a bicarbonate-containing, crosslinker-free reagent composition which reverses and/or reduces sample handling effects, such as aeration-induced shrinkage and storage-induced swelling of cells in a whole blood sample, particularly for a blood sample requiring repeated sampling and/or subjected to long-term storage. The reagent composition serves as a diluent medium for a blood sample, or an aliquot or portion thereof. The pH of the reagent is in the range of about 7.2 to about 7.5, preferably 7.3. The stability of the pH 7.2-7.5 bicarbonate-containing reagent over time is maintained by storing the reagent in a flexible collapsible container which is impermeable to carbon dioxide and is comprised of a multilayered flexible material, preferably plastic, and attachable to a hematology analyzer.
摘要:
A flow cytometry method for reproducibly detecting and counting a lymphocyte population of interest in a leukocyte suspension or whole blood sample in which the red cells are subsequently lysed. The suspension (or sample) is combined with a reagent comprising a primary antibody, either native, carrying an attached enzyme or biotin or other label, and a fixative reagent, in either order. Where the enzyme is not attached, an enzyme is coupled specifically to the primary antibody. The fixed suspension is reacted with a color-producing enzyme-cytochemical reagent. The suspension, now including stained and unstained fixed cells, is passed through a flow cytometer and the cells are characterized and counted on the basis of their light-scattering and light-absorbing properties.
摘要:
A method is disclosed of blood serum sample preparation for improved, more accurate and precise, electro-optical method for measuring erythrocyte volumes, individually and as an average.