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4227814 |
Optical density detector
The optical detector is particularly adapted for use with an apparatus for separating blood into its components and is of the type including a centrifuge for centrifuging whole blood to separate...
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4225783 |
Determination of microbial cells in aqueous samples
The present invention encompasses a method for enumerating microbial cells in an aqueous test sample comprising: fluorescently labeling the microbial cells in test sample intermixing a known amount...
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4225229 |
Apparatus for measuring cytological properties
A flow chamber includes a flow passage having a knee with a window through which cells in liquid suspension pass. An optical system establishes an observation plane through the passage at the...
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4219440 |
Multiple analysis hematology reference control reagent and method of making the same
A single diagnostic test reagent for use as a multiple-analysis hematology reference control for monitoring the precision and accuracy of measurements or determinations of red blood cell, white...
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4217107 |
Method of measuring blood clotting time
A blood clotting end point detector which includes means for monitoring an electrical signal representing the value A of one or more optical properties of a blood plasma sample to which a...
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4209256 |
Liquid flow viewing cell and method for analyzing liquid stream
The invention is for a method for analyzing a stream of liquid such as blood and apparatus for carrying out the method. While it is known to present a moving column of liquid in a viewing cell,...
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4204837 |
Method of rate immunonephelometric analysis
A method of determining the need for post-addition of antigen or antibody to an antigen-antibody reaction to ascertain whether the reaction is in an antigen excess or an antibody excess condition....
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4201470 |
Method and apparatus for measurement and registration of the aggregation rate of particles suspended in a liquid
A method for the measurement of the aggregation rate of particles suspended in a liquid, particularly of red blood corpuscles in the blood by measuring the intensity of a light beam impinging on...
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4202037 |
Computer microscope apparatus and method for superimposing an electronically-produced image from the computer memory upon the image in the microscope's field of view
A computer is coupled to a suitable light microscope in a closed-loop feedback system which facilitates total intervention by the operator. A graphics display electronically produces an image...
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4200110 |
Fiber optic pH probe
A fiber optic pH probe suitable to be implanted in tissue for physiological studies is disclosed. The probe includes an ion permeable membrane envelope which encloses the ends of a pair of optical...
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4200435 |
Determination of glycosylated hemoglobin in blood
A method for determining glycosylated hemoglobin in blood samples which involves liberating hemoglobins from red blood cells by chemical or physical means and reacting non-glycosylated hemoglobin...
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4199748 |
Automated method and apparatus for classification of cells with application to the diagnosis of anemia
A method and apparatus are disclosed for measuring characteristics of cells, such as red blood cells, and for analyzing parameters of the cell characteristics to define a patient's blood. These...
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4199686 |
Dark field illuminator and collector apparatus and method
There is disclosed an illuminator and collector apparatus and method for fluorescence analysis wherein illumination of a stream of particles produces fluorescent light. A reflector, having a...
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4197088 |
Method for qualitative and quantitative determination of immunological reactions
A method for qualitative and quantitative determination of agglutination in immunoreactive systems, and for determining the concentration of the immunoreactive components of such system, which...
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4191940 |
Method and apparatus for analyzing microscopic specimens and the like
To form a map of the characteristics of a microscopic specimen, the specimen is supported on a slide and a point on the specimen is subjected to either polychromatic radiation or a series of...
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4190328 |
Process for detection of blood-borne parasites
A process for detecting parasites which are found in the blood of a host. A sample of blood is drawn into a capillary tube which contains a generally cylindrical mass having a specific gravity such...
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4189401 |
Method of storing a biological reference control standard and biological reference control standard obtained thereby
An improved method of storing and shipping a blood serum reference composition comprising in its non-biological component from about 40 to about 85 weight percent water, from about 15 to about 60...
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4189236 |
Ellipsoid-conic radiation collector and method
Disclosed is a radiation collector apparatus and method primarily for counting and analyzing a flow of dilute particulate material, such as blood cells, sperm cells and the like, through the use of...
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4188542 |
Mirror image ellipsoid radiation collector and method
Disclosed is a radiation collector apparatus for analyzing particles by irradiating the particles to produce a source of detectable radiation, wherein the radiation collector apparatus comprises a...
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4188543 |
Ellipsoid radiation collector apparatus and method
Disclosed is a radiation collector apparatus and method primarily for counting and analyzing a flow of dilute particulate material, such as blood cells, sperm cells and the like, through the use of...
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4183360 |
Multifinger photocell plethysmography system
A photoplethysmographic instrument for simultaneous recordings of multifinger blood flow. The instrument consists of a plurality of suitably spaced and angled finger-receiving housings, each...
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4182161 |
Apparatus for timing and recording sedimentation rate of fluid samples
A device for automatically timing and recording the sedimentation rate of fluid samples contained in cylindrical, transparent test tubes includes a generally rectangular rack having flat vertical...
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4181610 |
Blood leak detector suitable for use with artificial kidneys
A high sensitive and stable blood leak detector suitable for use with artificial kidneys. The detector has an optical portion comprising a measurement cell through which dialysis solution under...
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4179398 |
Platelet control composition
A platelet reference control composition comprising goat blood cells shrunken to the size of human platelets.
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4178917 |
Method and system for non-invasive detection of zinc protoporphyrin in erythrocytes
A method and system for the non-invasive detection of zinc protoporphyrin (ZPP) in erythrocytes. Light at least partially within the fluorescence excitation spectrum of ZPP is directed onto the...
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4175860 |
Dual resolution method and apparatus for use in automated classification of pap smear and other samples
A method and apparatus is disclosed for use in performing automated classification of cells of a pap smear as well as other types of cells, such as red blood cells and blood cell neutrophiles. The...
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4175859 |
Apparatus for automated classification of white blood cells
An apparatus for automated classification of white blood cells comprising photo-electric converter means whereby the green and blue lights passing through the blood smear are converted into the...
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4174178 |
Blood serum bearing film with position indicating mark
A plurality of spaced blood serum samples are disposed on a serum-bearing film having a leading and trailing edge. The blood serum samples are disposed in an array and each blood serum sample has a...
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4171866 |
Disposable volumetric slide
A disposable low cost laboratory slide for measuring particle concentration has a base plate in the form of a standard microslide whose thickness is compatible with microscope optics. Tapes of...
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4169676 |
Method for determining the contents of metabolic products in the blood
A method and instrument for determining the amounts of metabolic products in blood using a laser beam guided through an ATR plate placed against a blood supplied biological tissue. The intensity of...
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4169125 |
Modular chemical analysis system
The modular chemical analysis system includes a first module or sample preparation apparatus for preparing sample solutions, a second module including a nephelometer apparatus comprising a...
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4167331 |
Multi-wavelength incremental absorbence oximeter
Light of two different wavelengths is passed through or reflected from a member of the body so as to be modulated by the pulsatile blood flow therein. The amplitudes of the alternating current...
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4166695 |
Method and apparatus for measuring retinal blood flow
Blood flow in retinal blood vessels is measured by directing laser radiation along an optical path into the eye and onto a blood vessel. Laser radiation reflected off moving blood corpuscles is...
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4166961 |
Method and apparatus for detecting a blood leak in a hemodialysis system
A blood leak in the dialyzer is detected by transmitting a pulsed beam of light into the dialysate flowstream at a predetermined angle of incidence between the central axis of the flowstream and...
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4163615 |
Reader for hematocrit value
A device permitting the rapid and direct determination of red cell percentages in centrifuged blood samples comprised of a scale optically variable in length in combination with an adjustable...
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4159895 |
Method and apparatus for the detection of beta thalassaemia minor
Method and automatic, electronic apparatus for detecting carriers of thalassaemia, especially beta thalassaemia minor, which involve measuring the mean corpuscular volume (MCV) and the mean...
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4156570 |
Apparatus and method for measuring white blood cell and platelet concentrations in blood
An apparatus and method for measuring the linear extent and hence the concentration of several constituent blood cell types which are contained in the buffy coat of a centrifuged sample of...
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4150360 |
Method and apparatus for classifying biological cells
A means of probing a biological cell sample with a optical source to determine the characteristics of the cell image by way of measuring parameters from its two dimensional Fourier transform. These...
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4149405 |
Process for measuring the viscosity of a fluid substance
The viscosity of a fluid material, e.g. a synthetic-resin composition, or the coagulation of blood or plasma monitored by placing a quantity of the fluid substance on a support, directing a beam of...
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4148607 |
Apparatus and analysis for agglutination reaction
Analysis of and apparatus for studying simple or complex agglutination reactions, such as for blood analysis and in particular blood groupings in which the specimen is mixed with at least one...
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4139303 |
Adaptive coherent optical processing method and apparatus for recognizing and counting objects
Recognizing and counting geometrically distant objects, such as objects of a particular morphological type (e.g., reticulated red blood cells), located in a field of objects of varying types is...
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4135819 |
Apparatus for measuring the aggregation rate of particles
Apparatus for measuring the aggregation rate of particles in liquids, comprising a transparent mixing chamber, a drive causing mixing, a photoelectric system for observing the mixed material in the...
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4135818 |
Platelet aggregation monitoring device
A difference amplifier continuously generates a signal representing the difference between the optical densities of a platelet rich and a platelet poor sample of blood plasma. If this signal lies...
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4134678 |
Automatic blood analysis apparatus and method
Method and apparatus for the simultaneous automatic analysis and sequential displaying in digital form of a plurality of parameters of whole or hemolyzed blood samples, such as total hemoglobin,...
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4129854 |
Cell classification method
A method wherein at least one standard leukocyte is selected from within a blood film in advance, the values of adjustments are calculated on the basis of the differences between a plurality of...
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4125327 |
Method and apparatus for simultaneously recording reaction times
An apparatus and method of determining the end point of a chemical reaction producing an optical change in a plurality of samples is disclosed. The invention is particularly suitable for the...
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4118974 |
Method and apparatus for measuring erythrocyte sedimentation rate
In a method of measuring erythrocyte sedimentation rate of the type wherein the upper level of a blood sample contained in a vertical test tube is detected by a photoelectric detection unit, the...
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4116564 |
Apparatus for the study of plasmas
The apparatus comprises a massive body accurately maintained at 37° and having a through horizontal bore in which are disposed in succession a bulb, a first concentrating lens, a test tube...
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RE29769 |
Method and apparatus for deriving oxygen association rate curves for blood samples
A method and apparatus for deriving an oxygen association rate curve for a blood sample wherein the sample is introduced into a transparent-walled cell and is deoxygenated by contact with a...
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4114144 |
Automatic air-in-line fluid detector
An automatic air-in-line detector for either a transparent or an opaque fluid including first detector means for detecting air-in-line in the transparent fluid and second detector means for...
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