Abstract:
A system for analyzing a biological fluid or the like for a constituent of interest comprises structure defining a sample inlet port, structure defining an analysis region, a measuring system connected in sensing relation to the analysis region, and structure defining a reaction chamber that has an immobilized enzyme capable of modifying the constituent of interest. Control means operates liquid flow means in a unidirectional sample flow mode to initially flow a sample of material to be analyzed from the sample inlet port to the reaction chamber and to the analysis region for a measurement of unmodified sample material, and then operates the liquid flow means in a bidirectional sample flow mode to oscillate the sample material in the reaction chamber and facilitate modification by the immobilized enzyme of the constituent of material in the sample. Modified sample material is then introduced into the analysis region and the measuring system is operated to obtain a measurement of modified sample material, the measurements of modified and unmodified sample material then being used to provide an indication of the amount of the constituent of interest in the sample material.
Abstract:
A system for analyzing a biological fluid or the like for a constituent of interest comprises structure defining a sample inlet port, structure defining an analysis region, a measuring system connected in sensing relation to the analysis region, and structure defining a reaction chamber that has an immobilized enzyme capable of modifying the constituent of interest. Control means operates liquid flow means in a unidirectional sample flow mode to initially flow a sample of material to be analyzed from the sample inlet port to the reaction chamber and to the analysis region for a measurement of unmodified sample material, and then operates the liquid flow means in a bidirectional sample flow mode to oscillate the sample material in the reaction chamber and facilitate modification by the immobilized enzyme of the constituent of material in the sample. Modified sample material is then introduced into the analysis region and the measuring system is operated to obtain a measurement of modified sample material, the measurements of modified and unmodified sample material then being used to provide an indication of the amount of the constituent of interest in the sample material.
Abstract:
An analysis system includes sample insertion module structure with structure defining a reduced pressure reservoir, structure defining a sample region, and structure defining a reagent circuit that includes metering chamber structure in series with the reagent circuit. First transfer valve structure is arranged to couple the sample region to the reagent circuit on one side of the metering chamber structure, and second transfer valve structure is arranged to couple the reagent circuit to the reduced pressure reservoir structure on the side of the metering chamber structure remote from the first transfer valve structure for inserting an intact metered quantity of sample liquid into a reagent stream.
Abstract:
An instrument for measuring coagulation parameters is provided in which plasma and at least one reagent are mixed by spinning in a cuvette with transparent windows and in which measurement is then made of scatter by the mixture of the energy of a light beam sent into the mixture. Upon spin, the plasma components and reagent are displaced into the chamber,thus determining the initiation of the presence of the mixture in which the clot forms, and a photodetecting unit senses the change in the energy of the scattered light, caused by clot formation.