摘要:
An apparatus for and method of analyzing hematologic samples deposited within a capillary tube is provided. The method includes the steps of: a) imaging a region of sample centrifuged within a capillary tube using a first analysis device, which region is defined by substantially all of the radial width and axial length of the sample residing within the internal cavity of the tube where the float resides after centrifugation, and producing signals representative of the image; b) communicating the signals representative of the image to a second analysis device independent of, and remotely located from, the first analysis device; c) processing the signals representative of the image using the second analysis device and producing analysis data based on the signals; and d) displaying the image of the region of the sample using the second analysis device.
摘要:
Detection and characterization of immunologically detected substances are performed electronically on human and animal biological fluids such as whole blood, serum, plasma, urine, milk, pleural and peritoneal fluids, and semen, which fluids are contained in a thin chamber forming a quiescent fluid sample, which chamber has at least two parallel planar walls, at least one of which is transparent.
摘要:
A method for enumerating platelets within a blood sample is provided. The method includes the steps of: 1) depositing the sample into an analysis chamber adapted to quiescently hold the sample for analysis, the chamber defined by a first panel and a second panel, both of which panels are transparent; 2) admixing a colorant with the sample, which colorant is operative to cause the platelets to fluoresce upon exposure to one or more predetermined first wavelengths of light; 3) illuminating at least a portion of the sample containing the platelets at the first wavelengths; 4) imaging the sample, including producing image signals indicative of fluorescent emissions from the platelets, which fluorescent emissions have an intensity; 5) identifying the platelets by their fluorescent emissions, using the image signals; 6) determining an average fluorescent emission intensity value for the individual platelets identified within the sample; 7) identifying clumps of platelets within the sample using one or more of their fluorescent emissions, area, shape, and granularity; and 8) enumerating platelets within each platelet clump using the average fluorescent emission intensity value determined for the individual platelets within the sample.
摘要:
Embodiments of the present invention are directed to harvesting a target material from a suspension using a tube and float system. A suspension suspected of containing a target material is combined with a solution having one or more labels that distinguish the target material from other materials in the suspension. The tube, float, and suspension are centrifuged to separate various materials in the suspension according to associated specific gravities. The float expands the axial length of the target material layer and displaces the target material to a narrow space between the float and the inner wall of the tube. The space is illuminated with light that causes the labels to emit light identifying the location of the target material within the tube. One or more openings can then be formed in the tube at or near the point where the target material is located and the target material harvested.
摘要:
A method and apparatus for measuring antibody titers in a thin film sample in an automated system which does not require multiple dilutions. The system provides a simple method for creating an in-situ dilution within a sample analysis chamber without the use of any precision fluid-handling components, and further, to use the same principles to provide a wide range of sample dilutions within the chamber so as to obviate the need for additional dilution steps when dealing with samples possibly containing wide ranges of analyte concentrations.
摘要:
A method for determining the hematocrit of a blood sample is provided that includes the steps of: 1) depositing the sample into an analysis chamber adapted to quiescently hold the sample for analysis, the chamber defined by the interior surfaces of first and second panels and a height extending there between, wherein both panels are transparent, and the height is such that at least some of the red blood cells within the sample contact both interior surfaces of the panels and one or more lacunae within the quiescent sample extend between the interior surfaces; 2) imaging at least a portion of the quiescent sample, which sample portion contains the red blood cells and one or more lacunae to determine an optical density of the imaged portion of the sample on a per image unit basis; 3) selecting and averaging the optical density values of the image units aligned with the red blood cells contacting the interior surfaces, and assigning an upper boundary value of 100% to the average optical density value of those image units; 4) selecting the optical density values of the image units aligned with the one or more lacunae, and assigning a lower boundary value of 0% to the optical density values of those image units; and 5) determining the hematocrit of the sample by assigning relative values to the optical density value of each image of the imaged sample portion as a function of the upper and lower boundary values, and averaging the relative values.
摘要:
A method for analyzing blood enables one to isolate, detect, enumerate and confirm under magnification the presence of target cells which have expressed surface epitopes that indicate intracellular infection by various viruses or other infectious agents, and also cells which have expressed surface epitopes that indicate the presence of non-infectious medical conditions. The analysis involves the examination of cells in the blood sample for the presence or absence of particular surface epitopes while the blood sample is disposed in a centrifuged blood sampling container. The epitopic analysis for the presence or absence of infected cells, or cells which indicate the presence of non-infectious medical conditions relies on the detection of known target expressed epitopes. The target epitopes on the target cell types are epitopes which are also known to be absent on normal circulating cells in the blood. Fluorophores or other labels with distinct wavelength emissions are coupled with specific binding agents such as lectins, antibodies, aptamers, or the like, which are directed against the target expressed epitopes. The epitopic analyses may be performed in or near the expanded buffy coat layer in the centrifuged blood sample. The epitopic analysis may be performed under magnification either visually and/or photometrically. The blood sampling container is sized to hold between about 1 and about 20 ml, preferably about 10 ml of blood, and contains an insert that occupies about 90–98% of the volume of the container bore in the area of the container where the target cells will, if present, be detected. The insert forces the target cells in question to reside in an annular space in the container which is adjacent to the circumference of the container bore. The entire analysis can be performed in a relatively short period of time which is typically a matter of minutes to single digit hours.
摘要:
A method for analyzing blood enables one to isolate, detect, enumerate and confirm under magnification the presence of target cells which have expressed surface epitopes that indicate intracellular infection by various viruses or other infectious agents, and also cells which have expressed surface epitopes that indicate the presence of non-infectious medical conditions. The analysis involves the examination of cells in the blood sample for the presence or absence of particular surface epitopes while the blood sample is disposed in a centrifuged blood sampling container. The epitopic analysis for the presence or absence of infected cells, or cells which indicate the presence of non-infectious medical conditions relies on the detection of known target expressed epitopes. The target epitopes on the target cell types are epitopes which are also known to be absent on normal circulating cells in the blood. Fluorophores or other labels with distinct wavelength emissions are coupled with specific binding agents such as lectins, antibodies, aptamers, or the like, which are directed against the target expressed epitopes. The epitopic analyses may be performed in or near the expanded buffy coat layer in the centrifuged blood sample. The epitopic analysis may be performed under magnification either visually and/or photometrically. The blood sampling container is sized to hold between about 1 and about 20 ml, preferably about 10 ml of blood, and contains an insert that occupies about 90-98% of the volume of the container bore in the area of the container where the target cells will, if present, be detected. The insert forces the target cells in question to reside in an annular space in the container which is adjacent to the circumference of the container bore. The entire analysis can be performed in a relatively short period of time which is typically a matter of minutes to single digit hours.
摘要:
This method for analyzing blood enables one to isolate, detect, enumerate and confirm under magnification the presence or absence of fragments of target analyte cancer cells which are circulating in blood. The analysis is performed in a sample of centrifuged anticoagulated whole blood. The analysis of the presence or absence of fragments of cancer cells relies on the detection of external or internal binding sites which are known to be present only in or on tumorous cancer cells. Fluorophors with distinct wavelength emissions are coupled with antibodies, or other binding moieties such as complementary nucleotide sequences, which antibodies are directed against the epithelial cell fragment membrane binding sites, such as internal or external surface epitopes on the cell fragments, or internal binding sites on cell organelles; and which nucleotide sequences are complementary to portions of cell fragment RNA and/or DNA. The labled binding agents are humoric or soluble in the blood sample. The labeled fluorometric binding site-specific materials may be coupled to small plastic beads which have a density or specific gravity that is preferably greater than the specific gravity or density of the red blood cells. The target cell fragments are less dense than the red cells, and typically have the same density or specific gravity as the platelets or white blood cells in the blood sample. Any of the labeled beads which couple with target cell analyte fragments will have a density or specific gravity that is less than the red cells in the blood sample. Thus cell fragment/labeled bead couples will gravitate into an area in the centrifuged blood sample which area is somewhere above the centrifuged red cell layer. The detection of the labeled target analyte/particle couples can be performed in situ in the centrifuged blood sample either visually or photometrically.
摘要:
A method for analyzing blood enables one to isolate, detect, enumerate and confirm under magnification the presence or absence of target cancer cells and/or hematologic progenitor cells, or other rare events which are known to circulate in blood. The analysis is performed in a sample of centrifuged anticoagulated whole blood. The analysis involves both morphometric and epitopic examination of the blood sample while the blood sample is disposed in a centrifuged blood sampling container. The epitopic analysis of the presence or absence of cancer cells relies on the detection of epitopes which are known to be present on cancer cells and not on normal circulating blood cells; and the epitopic analysis of the presence or absence of hematologic progenitor cells relies on the detection of epitopes which are known to be present on hematologic progenitor cells and not on normal circulating blood cells. The targeted epitopes on the target cell types are epitopes which are also known to be absent on normal circulating blood cells; and the target cancer cell epitopes are epitopes which are known to be absent on target hematologic progenitor cells. Fluorophors with distinct emissions are coupled with antibodies which are directed against the targeted epitopes. The morphometric analysis is performed by staining the cells in the blood sample with an intracellular stain, such as acridine orange, which highlights the intracellular cell structure. Both the morphometric and epitopic analyses are preferably performed in the expanded buffy coat layer in the centrifuged blood sample. The morphometric analysis and/or the epitopic analysis may be performed under magnification both visually and/or photometrically.