摘要:
A disposable diagnostic device and method of its use are provided. The device comprises a housing containing first and second flow paths orthogonal to each other. The first flow path commences at a sample addition port and continues through a transport channel which feeds sample to an incubation area by means of capillary flow. The incubation area comprises a signal producing system and is underneath an optically-clear window. The first flow path terminates in a top waste reservoir which receives sample and wash fluid. The second flow path begins on one side of the incubation area at an inlet port over a side reagent reservoir. Liquid flows along the second flow path from the side reagent reservoir across the incubation area into the side waste reservoir. The incubation area may comprise agitation means for homogenous dispersion of reagent into liquid. Various reagents of a signal producing system may be contained within the device and the necessary liquids added automatically by appropriate instrumentation, so as to have the assay carried out automatically, without technician involvement, providing an accurate and sensitive determination.
摘要:
Methods and compositions are provided for the detection of analytes. The method employs a fluorescence production layer which comprises a fluorescent polymerized polyunsaturated lipid layer in association with a ligand which is a member of a specific binding pair, where the ligand is competitive with the analyte for the complementary binding member or is a complementary binding member. By providing for a fluorescence modulation reagent which binds to the fluorescence production layer in proportion to the amount of analyte in the sample, by measuring the resulting fluorescence after carrying out the assay methodology, the amount of analyte can be determined quantitatively.
摘要:
Methods and compositions are provided for the detection of analytes. The method employs a fluorescence production layer which comprises a fluorescent polymerized polyunsaturated lipid layer in association with a ligand which is a member of a specific binding pair, where the ligand is competitive with the analyte for the complementary binding member or is a complementary binding member. By providing for a fluorescence modulation reagent which binds to the fluorescence production layer in proportion to the amount of analyte in the sample, by measuring the resulting fluorescence after carrying out the assay methodology, the amount of analyte can be determined quantitatively.
摘要:
Methods and systems for lowering elevated intracranial pressure utilizing a fluid drainage controller which regulates the drainage of cerebral spinal fluid based on a cardiac or other transient component of the patient's intracranial pressure. The cardiac component of the intracranial pressure increases as the accumulation of cerebral spinal fluid in the patient's subarachnoid space increases, but is not directly a function of the absolute mean or baseline intracranial pressure. Thus, control based on the cardiac component is relatively independent of patient position and the risk of over or under draining the cerebral spinal fluid is lessened.
摘要:
A disposable diagnostic device and method of its use are provided. The device comprises a housing containing first and second flow paths orthogonal to each other. The first flow path commences at a sample addition port and continues through a transport channel which feeds sample to an incubation area by means of capillary flow. The incubation area comprises a signal producing system and is underneath an optically-clear window. The first flow path terminates in a top waste reservoir which receives sample and wash fluid. The second flow path begins on one side of the incubation area at an inlet port over a side reagent reservoir. Liquid flows along the second flow path from the side reagent reservoir across the incubation area into the side waste reservoir. The incubation area may comprise agitation means for homogenous dispersion of reagent into liquid. Various reagents of a signal producing system may be contained within the device and the necessary liquids added automatically by appropriate instrumentation, so as to have the assay carried out automatically, without technician involvement, providing an accurate and sensitive determination.
摘要:
A device and method for its use in diagnostic assays are provided. The device comprises at least one assay path, where an assay path includes a main flow path and at least one side reagent channel. The main flow path begins at a sample addition port, continues through a main reagent area into an incubation area and ends in a waste area. In fluid communication with the main flow path is at least one side reagent channel that begins at a liquid addition port, continues through a side reagent area and ends in said main channel at a region between the main reagent and waste areas, usually upstream from the incubation area. Agitation means may be included in at least one of the main and side reagent areas and/or the incubation area. At least one fluid interruption means located at various positions along the main and side reagent channels upstream from the incubation area provide for control over reagent interaction and fluid flow through the device. Applications in which the device finds use include diagnostic assays employing signal producing systems based on the interactions of specific binding pair members, where an optical signal is related to the presence of analyte.
摘要:
A disposable diagnostic assay device and method for its use are provided. The device comprises a sample addition port in fluid communication with at least one main channel. The main channel comprises, in the direction of fluid flow, a main reagent area in fluid communication with an incubation area and a waste area. In fluid communication with the main channel is at least one side reagent channel. The side reagent channels comprise, in the direction of fluid flow, a liquid addition port and a side reagent area in fluid communication with the main channel at a region of the main channel upstream from the incubation area. Agitation means may be included in the at least one of the main and side reagent areas and/or the incubation area. Capillary valves may be located at various positions along the main and side reagent channels upstream from the incubation area, providing for control over fluid flow through the device. Applications in which the device finds use include diagnostic assays employing signal producing systems based on the interactions of specific binding pair members, where optical signals are related to the presence of analyte.