Abstract:
PROBLEM TO BE SOLVED: To remarkably reduce a dependency with respect to a wavelength of fluorescent excitation light, and to change the fluorescent excitation maximum of a fluorescence emission group. SOLUTION: A detecting medium containing the fluorescence emission group or a precursor of the fluorescence emission group is mixed with an absorber having an absorption spectrum overlapped with a fluorescent excitation range of the fluorescence emission group. A system generated in the detecting medium and comprising the fluorescence emission group and the absorber has a changed effective fluorescent excitation range accompanied with the changed fluorescent excitation maximum. Irradiation by the fluorescent excitation light is executed within the range of the changed excitation maximum. A measured signal obtained from fluorescence emission measurement indicates only the low dependency with respect to the wavelength of the excitation light. Further, an inexpensive light source such as UV LEDs may be usable because of the changed wave length of the excitation light. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
The invention refers to a Medical test device for the optical determination of a medically important analyte in an aqueous fluid sample, particularly in blood, said test device comprising: a light source (5) for irradiating a sample with primary light (4), a signal lightdetector (10) which provides an analogue measurement signal characterizing the intensity of detected light and which is arranged for detection of secondary light (6) resulting from interaction of primary light (4) with the sample, a base lightdetector (13) which provides an analogue base signal characterizing the intensity of detected light and which is arranged for detection of ambient light (9) , which may contain primary light (4) , analyzing means (15) for analyzing the signals created by the signal lightdetector (10) and the base lightdetector (13) in order to determine the presence and/or concentration of the analyte in the sample. In order to compensate for the part of the measurement signal caused by ambient light (9) , which is detected by the signal lightdetector (10) in addition to secondary light (6) , the signal lightdetector (10) and the base lightdetector (13) are connected to a common line (14) , which leads to the analyzing means (15) , in such a way that the analogue signals created by the lightdetectors (10,13) are subtracted from each other resulting in a compensated analogue signal provided to the analyzing means (15).
Abstract:
Sistema de análisis de elemento de prueba (110) para un examen analítico de una muestra (118), en particular de un líquido corporal, que comprende - un dispositivo de evaluación (112) con un soporte de elemento de prueba (114) para posicionar un elemento de prueba (116) que contiene la muestra (118) y un dispositivo de medición (134) para medir un cambio en una zona de medición (122) del elemento de prueba (116), siendo el cambio característico para un analito, en el que el soporte de elemento de prueba (114) contiene elementos de contacto (132) con superficies de contacto (133) que permiten un contacto eléctrico entre las superficies de contacto (117) del elemento de prueba (116) y las superficies de contacto (133) del soporte de elemento de prueba (114), - en el que las superficies de contacto (133) de los elementos de contacto (132) del soporte de elemento de prueba (114) están provistas de una superficie eléctricamente conductora (145) que contiene rutenio metálico (146), caracterizado por que el soporte de elemento de prueba (114) comprende al menos una parte metálica (148) que contiene los elementos de contacto (132) con las superficies de contacto (133), en el que la parte metálica (148) está fabricada de al menos un material conductor (150) distinto de rutenio, en el que el material conductor (150), en la región de los elementos de contacto (132), está total o parcialmente revestido con rutenio de modo que al menos las superficies de contacto (133) están revestidas con rutenio.
Abstract:
Procedure for the detection of an analyte in a sample by fluorescence measurement, comprises providing a detection medium containing the sample, optionally at least an analyte detecting reagent, a fluorophore or its preliminary component, an absorber that absorbs light over a part of the excitation range of the fluorophore; irradiating the medium with light for the excitation of the fluorophore within the range of the second wavelength; and determining the fluorescence emission of the fluorophore in one or more measuring wavelengths. Procedure for the detection of an analyte in a sample by fluorescence measurement, comprises providing a detection medium containing at least a part of the sample, in which the analyte has to be detected, optionally at least a reagent for the detection of the analyte, a fluorophore that possesses an excitation range with at least an excitation maximum with a first wavelength, or a fluorophore preliminary component, from which the fluorophore is formed in the presence of the sample and optionally the reagent, an absorber that absorbs light over a part of the excitation range of the fluorophore; irradiating the medium with light for the excitation of the fluorophore within the range of the second wavelength; and determining the fluorescence emission of the fluorophore in one or more measuring wavelengths to determine the quantity or activity of the analyte in the sample. Independent claims are included for: (1) a test element, for the detection of an analyte, comprising the fluorophore, absorber and optionally at least a reagent for the detection of an analyte, where the fluorophore and/or fluorophore preliminary component and absorber are located on the test element in such a manner that the irradiated light for the excitation of the fluorophore comes in contact at first with the absorber and then with the fluorophore or meets both the absorber and the fluorophore simultaneously, and the system from fluorophore and absorber results in an effectively changed excitation maximum with a second wavelength that is different from the first; and (2) use of a test element in a procedure, for the detection of an analyte in a sample, comprising contacting the test element with the sample, irradiating the sample with a light for the excitation of the fluorophore within the range of the second wavelength, and determining the fluorescence emission of the fluorophore.
Abstract:
Un sistema de análisis del elemento de prueba (130) para el examen analítico de una muestra, en particular de un líquido corporal, que comprende: - al menos un dispositivo de evaluación (158) con al menos un soporte del elemento de prueba (142) adaptado para colocar un elemento de prueba (110) que contiene la muestra y al menos un dispositivo de medición (160) adaptado para medir un cambio en una zona de medición (118) del elemento de prueba (110), siendo el cambio característico del analito; - al menos un elemento de calentamiento eléctrico (132) configurado para calentar eléctricamente el elemento de prueba (110); - al menos una fuente de alimentación eléctrica (148) adaptada para suministrar energía eléctrica al elemento de calentamiento eléctrico (132); - al menos un sensor de temperatura (140) conectado al soporte del elemento de prueba (142) adaptado para detectar una temperatura del soporte del elemento de prueba (142); - al menos un dispositivo de detección de huecos (150) configurado para monitorizar la energía eléctrica Espez suministrada por la fuente de alimentación eléctrica (148) al elemento de calentamiento eléctrico (132) para alcanzar una temperatura objetivo predeterminada medida por el sensor de temperatura (140); caracterizado por que el dispositivo de detección de huecos (150) está configurado para evaluar la energía eléctrica Espez suministrada por la fuente de alimentación eléctrica (148) al elemento de calentamiento eléctrico (132) para alcanzar la temperatura objetivo predeterminada y derivar al menos un elemento de información sobre un contacto térmico entre el elemento de calentamiento eléctrico (132) y el elemento de prueba (110) basado en la evaluación de la energía eléctrica Espez.