Abstract:
PROBLEM TO BE SOLVED: To reduce influence of mechanical and thermal effects on the skin of the subject due to contact between a measurement probe and the skin. SOLUTION: A non-invasive measurement apparatus for measuring glucose in a subject optically and non-invasively via the measurement probe 11 comprises a light source and a light detector 18 connected to the measurement probe, an applicator having a shape similar to that of the measurement probe, and a computer section 21 which controls the light source and the light detector. The computer section also controls the applicator to make the applicator contact the skin of the subject at a pressure higher than a pressure per unit area applied on the skin by the measurement probe during non-invasive measurement so as to stretch the skin of the subject before the non-invasive measurement. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To solve the problems that a part to be measured in a subject and a measurement condition are changed whenever measurement is performed or dependence is performed on the position of the part to be measured due to a difference in the tissue of the subject, etc., so as to differ a measurement result or that the component of light to be the main cause of inhibition in performing the quantitative analysis or qualitative analysis of tissue property in the subject is mixed when a desired optical signal is detected, which related to the tissue property of the subject. SOLUTION: In the noninvasive inspecting apparatus, the subject is irradiated with monochromatic light with at least one wavelengths or the desired light from an optical part 9, thereby detecting the light diffused, transmitted and/or reflected concerning the subject by the optical part 9 and noninvasively acquires information concerning the tissue property of the subject. The apparatus includes a mobile mechanism 5 arranged to move the optical part 9 so as to change the part to be irradiated and/or the part to be measured in the subject. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a non-invasive estimation method of glucose and a non-invasive estimation device of glucose which enable the track of temperature-induced sugar decomposition in non-invasive estimation of glucose.SOLUTION: Owing to glucose metabolic change induction, glucose metabolism, and hemoglobin variant concentration change in a skin nutritional capillary, a localized reflectance optical probe which is adjusted at temperature different from skin temperature makes contact with skin. A time window for data collection which can minimize the impact of tissue-probe adaptability for a signal is selected. The change of a localized reflected light signal for various distances between a light source and a detector, various wavelengths, various degrees of contact time is measured from the skin contact of a probe for a given length of time. A function change in relation to the influence of heat stimulation for light absorption change by hemoglobin is calculated as a result of the influence of temperature for glucose metabolism. The function change in relation to the effect of heat stimulation for light attenuation change is calculated as a result of light scattering and blood flow change. The calibration relation between the combination of a function which is drawn from the signal of localized reflectance and glucose concentration is drawn. In order to predict a glucose concentration in a subject in subsequent time, measurement and the established calibration relation are used.
Abstract:
PROBLEM TO BE SOLVED: To precisely measure a very weak acoustic signal induced by energy absorption of irradiation light. SOLUTION: This non-invasive biological information measuring instrument includes a light source 8, an irradiation part 10 for emitting light including a specified wavelength component generated in the light source, and an acoustic signal detecting part 11 having the transmissivity for the specified wavelength component, and arranged between a specimen and the irradiation part to detect the acoustic signal generated by the light energy absorption of a specified substance existing in the specimen, and the light emitted from the irradiation part irradiates the specimen via the acoustic signal detecting part. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method and an instrument for noninvasive measurement of biological information capable of precisely measuring a very feeble acoustic signal induced by energy absorption of irradiating light. SOLUTION: The instrument is provided with: a light source part 8; an irradiation part 10 for irradiating a patient with light including specific wavelength components generated by the light source part; a piezoelectric element 30 formed from a piezoelectric single crystal containing lead titanate; and an acoustic signal detection part 11 for detecting the acoustic signal generated by absorbing the energy of the irradiating light by a specific substance existing in the patient. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To improve calibration accuracy to seasonal and psychological variation of tissue property.SOLUTION: A noninvasive measurement instrument has a measurement probe 1 supposed to get into touch with a trial subject, a light source 6 and a photodetector 7 to be connected to the measurement probe, and a computer section 5 for controlling the light source and photodetector to optically and noninvasively measure information relating to glucose in the trial subject and predict the value of glucose by a calibration model from an output of the photodetector. The computer section updates the calibration model by executing regression estimation based on the acquired data by noninvasive measurement on a different day and the corresponding reference measurement value and predicts glucose density from the acquired data by noninvasive measurement by using the updated calibration model.
Abstract:
PROBLEM TO BE SOLVED: To compensate an influence of a bulk tissue characteristic to noninvasive measurement of an analysis object concentration in an object tissue, relative to an ultrasonic pulse generated in the object tissue in a specimen and propagated. SOLUTION: This analysis method has a step a for irradiating a specimen portion with a near infrared laser pulse from laser sources 15-18, and generating the ultrasonic pulse in the object tissue; a step b for detecting the ultrasonic pulse by a detector 32, and generating the first signal; a step c for generating the ultrasonic pulse in the object tissue by using a laser pulse having the same wavelength and energy as in the step b during an arrangement period of a light absorbing material between the laser sources and the specimen portion so that the ultrasonic pulse is generated in the light absorbing material, propagated through the tissue, and detected by the detector; a step d for detecting the ultrasonic pulse generated in the light absorbing material, and generating the second signal; a step e for calculating the intensity ratio between the first and second signals relative to each wavelength; a step f for calculating an absorption coefficient of the analysis object from the intensity ratio and an optical characteristic of the light absorbing material; and a step g for calculating the concentration of the analysis object from the calculated absorption coefficient, and calculating a molar absorption coefficient of the analysis object. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve the accuracy in calibration for the seasonal and physiological variation of tissue characteristics. SOLUTION: The non-invasive measuring device comprises a measuring probe 1, a light source 6, a photodetector, and a computer part 5 which controls the light source and photodetector to measure the information on the glucose in a subject and which estimates the glucose value based on a calibration model output from the photodetector. The computer part 5 determines the calibrated regression parameter of the calibration model, determines the estimated regression parameter of the calibration model by executing the regression operation for a reference measurement value based on the calibration model from an estimated data set, checks the accuracy in the non-invasive measurement from the difference between the glucose concentration estimated using the calibration model based on the result of the non-invasive measurement and the reference glucose concentration, and updates the calibration model. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To pursue temperature-induced glycolysis in the noninvasive measurement of glucose. SOLUTION: The change of glucose metabolism inside a skin nutrition capillary tube is induced, the change of localized reflectance optical signals in a plurality of distances between a light source and a detector and a plurality of wavelengths is measured as the function of the time of bringing a probe into contact with the skin, a time window capable of minimizing the influence of tissue and probe adaptation on signals is selected, and also the signals measured within the time window are used for the following calculation. One set of functions is calculated from a plurality of localized reflectance values in the plurality of distances between the light source and the detector and the plurality of wavelengths at a plurality of time intervals in at least two wavelengths within the time window, calibration relation between the combination of calculation functions and the glucose concentration of a living body is derived, and the calibration relation is used in order to predict the glucose concentration in body liquid in the following measurement. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
The instant invention provides immunoassay methods whereby the presence or amount of multiple analytes that may be present in a test sample can be detected. According to one embodiment, the method comprises the steps of: (a) contacting a test sample with a common capture reagent for a time and under conditions sufficient to form capture reagent/analyte complexes wherein the common capture reagent includes one or more specific binding members that immobilize at least two analytes that may be present in said test sample; (b) contacting the capture reagent/analyte complexes with at least two indicator reagents for a time and under conditions sufficient to form capture reagent/analyte/indicator reagent complexes; and (c) detecting at least two measurable signals as a measure of the presence or amount of the analytes in the test sample. Indicator reagents which are employed in the above embodiment can comprise detectable moieties from at least two distinct detectable moiety classes. The invention also applies to detecting multiple nucleic acid sequences which may be present in a test sample.