295 results about "Bioelectric Impedance" patented technology

Apparatus and methods are provided for monitoring cardiac output using bioelectrical impedance techniques in which first and second electrodes are placed in the trachea and / or bronchus in the vicinity of the ascending aorta, while an excitation current is injected into the thorax via first and second current electrodes, so that bioelectrical impedance measurements based on the voltage drop sensed by the first and second electrodes reflect voltage changes induced primarily by blood flow dynamics, rather than respiratory or non-cardiac related physiological effects. Additional sense electrodes may be provided, either internally, or externally, for which bioelectrical impedance values may be obtained. Methods are provided for computing cardiac output from bioelectrical impedance values. Apparatus and methods are also provided so that the measured cardiac output may be used to control administration of intravenous fluids to an organism or to optimize a heart rate controlled by a pacemaker.

A device to measure tissue impedance comprises drive circuitry coupled to calibration circuitry, such that a calibration signal from the calibration circuitry corresponds to the current delivered through the tissue. Measurement circuitry can be coupled to measurement electrodes and the calibration circuitry, such that the tissue impedance can be determined in response to the measured calibration signal from the calibration circuitry and the measured tissue impedance signal from the measurement electrodes. Processor circuitry comprising a tangible medium can be configured to determine a complex tissue impedance in response to the calibration signal and the tissue impedance signal. The processor can be configured to select a frequency for the drive current, and the amount of drive current at increased frequencies may exceed a safety threshold for the drive current at lower frequencies.

Methods and apparatus (20 ) process noninvasively measured electrical bio-impedence values and perform a technique that indicates whether there exists a change from a homeostatic fluid condition, preferably with respect to blood loss, in mammalian tissue. Analyses can be performed to determine a presence or a change in volume of fluid in an anatomical space of a mammal. A preferred implementation of such technique is embodied in an instrument that carries out a method that may predict an onset of a hemorrhagic shock condition.

There is provided an apparatus capable of carrying out an accurate bioelectrical impedance measurement by determining whether contact of a living body with electrodes used at the time of the bioelectrical impedance measurement is normal or not more accurately. The apparatus uses a parameter associated with a phase difference in determining the contact condition of the living body with the electrodes. As the parameter associated with a phase difference, the apparatus uses a value represented by X / R wherein R is a resistance component in a bioelectrical impedance to be measured and X is a reactance component in the bioelectrical impedance and determines that contact of the living body with the electrodes is not normal when the value of X / R is out of a determination range such as a<X / R<b (a and b are real numbers).

A dehydration condition judging apparatus is disclosed. The apparatus comprises a bioelectric impedance measuring device; a dehydration condition judging unit; an judgement result displaying unit; an inform time determining unit; and an informing device. The bioelectric impedance measuring device supplies an alternating current to a body of a subject and measures a bioelectric impedance value. The dehydration condition judging unit judges a dehydration condition of the subject based on the measured bioelectric impedance value. The judgment result displaying unit displays the judged dehydration condition. The inform time determining unit determines an inform time. The informing device informs the subject at the determined inform time that it is time to measure the total amount of body water.

Disclosed is an improvement in a living body variable measuring device comprising a weight scale-like body having electrodes and a weight sensor equipped therewith, and a box-like display device. The electrodes are used in measuring the bioelectrical impedance appearing between both feet. The weight scale-like body has a storage section so sized and shaped as to accommodate the box-like display device.

Disclosed is a body weight managing apparatus comprising: a body weight measuring unit; a bioelectric impedance measuring unit; a body water content evaluation unit; and a health condition evaluation unit. According to the present invention, said body weight measuring unit measures a body weight of a person to be measured, said bioelectric impedance measuring unit applies an alternating current to a body of the person and measures a bioelectric impedance value, said body water content evaluation unit evaluates a body water content based on the bioelectric impedance value measured by said bioelectric impedance measuring unit, and said health condition evaluation unit evaluates a health condition of the person based on the measured body weight and the evaluation result from said body water content evaluation unit.

The present invention aims to measure easily and accurately information about the panniculus (such as fatty layer, muscular layer, osseous layer) in the depth direction below the surface of a living body. To achieve this object, in an embodiment of the invention, a pair of current-carrying electrodes 1a, 1b and a pair of measuring electrodes 2a, 2b are rectilinearly arranged on the surface of the living body so that the measuring electrode 2a within a small area is placed very close to the current-carrying electrode 1a with small area. While constant current from a radio frequency current source 3 flows between the current-carrying electrodes 1a, 1b, the voltage between the measuring electrodes 2a, 2b is measured by the detector 4. The potential of the measuring electrode 2a is almost equal to the potential at the contact position P3 of the current-carrying electrode 1a, and the potential of the measuring electrode 2b is almost equal to the potential at the deepest position P1 of the vertical part 5c inside the living body 5. Therefore, the potential difference between the upper and lower ends of the vertical part 5c. The bioelectical impedance Zv of the vertical part 5c is calculated from the potential difference and the current i.

New systems and methods for remotely monitoring the activity, security, and health of an individual are provided. The monitoring system can be used to monitor both residence security and typical residential activity that is linked to the well being and health of an individual and can alert a third party when there is a digression from a predetermined set parameters. The monitoring system can incorporate a number of sensing elements including door opening and closing detection elements, passive infrared sensors, energy sensors for detecting the turning on and off of general household appliances, weighing scales, systolic blood pressure or pulse pressure measurement apparatus, bioelectrical impedance analysis measurement apparatus, breath analysis, and blood-based biological marker detection and quantification.

Bioelectric impedances are measured by use of a plurality of electrodes which are brought into contact with body parts of a living body, muscle volumes and maximum voluntary contractions in body parts such as both hands and feet of the subject are calculated from the measured bioelectric impedances, a mechanomyogram when several degrees of loads are imposed on a muscle is also measured, the mechanomyogram data is frequency analyzed so as to determine average frequency and amplitude data, the amounts of actions (frequency of emission) of muscle fibers are calculated from inflection points thereof, and the type of the muscle (muscle fibers) and muscle fatigue of the subject are determined, so as to easily measure a maximum voluntary contraction which has heretofore been difficult to measure and make evaluations associated with muscles more accurately.

Disclosed is an apparatus for continuously and automatically measuring a pulse wave by a non-invasive method to know the state of a cardiovascular system. The apparatus includes an integrated measurement module, a communication power module, and a bio-measurement pad. The integrated measurement module includes an electrocardiogram measurement portion for measuring the electrocardiogram of a subject, a bioelectrical impedance measurement portion for measuring the bioelectrical impedance of the subject by a potential difference, a heart sound measurement portion for measuring the heart sound of the subject, and a controller for measuring and controlling the state of the cardiovascular system of the subject on the basis of a pulse transit time calculated by the electrocardiogram signal measured at the electrocardiogram measurement portion, the bioelectrical impedance signal measured at the bioelectrical impedance measurement portion, and the heart sound signal measured at the heart sound measurement portion.

Disclosed is an improved bioelectrical impedance gauge which is so designed that the high-frequency current flowing between two selected points in a living body may be detected in the vicinity of either selected point, and that the voltage appearing between two points selected in the current passage in which the high-frequency current flows may be applied to a high-impedance buffer circuit proximate to the two points selected in the current passage.

Disclosed is an improved bioelectrical impedance gauge which is so designed that the high-frequency current flowing between two selected points in a living body may be detected in the vicinity of either selected point, and that the voltage appearing between two points selected in the current passage in which the high-frequency current flows may be applied to a high-impedance buffer circuit proximate to the two points selected in the current passage.

A body water amount condition judging apparatus which is capable of judging body water amount condition, such as edema or dehydration, in detail exactly is disclosed. In the apparatus, at least two values selected from intra-cellular water resistance, extra-cellular water resistance, combined resistance of the intra-cellular and extra-cellular water resistance, and a ratio of intra-cellular and extra-cellular water are judging parameters for body water amount condition, The apparatus comprises a multi-frequency bioelectric impedance measuring means for measuring bioelectric impedance using AC currents having different frequencies, a calculating means for calculating each value of a judging parameter based on the measured bioelectric impedance value, a body water amount condition judging means for judging body water amount condition based on the calculated each value of the judging parameter, and a display means for displaying the judging result of the body water amount condition so judged.

To permit a person to take a power-striding most effective to be healthy the quantity of exercising is managed by using, in combination, bioelectrical impedance measuring means 110; personal data inputting means 120; body fat rate calculating means 130 for determining the body fat rate on the basis of the personal data and the value of bioelectrical impedance; target body fat rate setting means 140; target calorie consumption calculator means 150 for calculating the calorie consumption required to attain the target body fat rate; management period setting means 160 for setting a length of period required to attain the target body fat rate; healthful calorie consumption calculator means 170 for calculating the calorie consumption per day within the management period; walking calorie per minute calculating means 180 for calculating caloric quantity consumed by walking per minute in consideration of the individual basal metastasis; healthful exercise quantity calculating means 190 for calculating the healthful exercise quantity per day required to consume the healthful calorie per day; exercise quantity measuring means 200; calorie consumption per day calculating means 210 for determining the calorie consumption on the basis of the so measured exercise quantity; and healthful exercise quantity correcting means 220 for comparing the calorie consumption per day of the previous day with the target value of the present day and for converting any difference therebetween in terms of exercise quantity, thereby renewing the healthful exercise quantity of the present day.

Non-invasive ventilation therapy systems and methods are disclosed. The system comprises a ventilation device, a computing device coupled to the ventilation device, and a plurality of sensors for acquiring a physiological bioelectrical impedance signal from a patient, wherein the sensors are functionally connected to the computing device. The computing device receives the physiological bioelectrical impedance signal from the sensors, analyzes the physiological bioelectrical impedance signal, and, based on the analyzed physiological bioelectrical impedance signal, transmits a signal to the ventilation device to adjust therapy levels.

A CPU (134) of a body composition measuring apparatus (100) drives a navel position indicator (118) so that it emits light. The height of a frame (114) is adjusted so that a beam of light from navel position indicator (118) irradiates the navel of a human subject. Plural sensors (106) are mounted on the frame (114), and each sensor measures a distance from the sensor to a position to be measured, whereby the abdominal width (X) of the human subject is determined. Subsequently, CPU (134) obtains measured values of weight (W) and bioelectrical impedance (Z). CPU (134) then reads an equation for calculating the visceral fat area and estimates the visceral fat area (Y) based on the measured abdominal width (X), weight (W), bioelectrical impedance (Z), and the equation.

A body composition data acquiring apparatus has a main unit comprising: bioelectrical impedance measuring means, body weight measuring means, leg length measuring means, and body composition data calculating means wherein the bioelectrical impedance measuring means measures a bioelectrical impedance between both feet by use of a group of electrodes which make contact with the bottoms of the feet of a subject, the bodyweight measuring means measures the body weight of the subject, the leg length measuring means measures the leg length of the subject, and the body composition data calculating means calculates the body composition data of the subject based on at least the bioelectrical impedance, body weight and leg length measured by these measuring means.

Disclosed is a impedance measuring apparatus which is easy to use, and which is guaranteed to be free of incorrect measurement caused by some joints appearing in the current flowing passage intervening between two selected body parts and by the indefinite length between two selected body parts. The measuring apparatus of the present invention limits the place of the body under measurement to "one body region", i.e. a selected joint-to-joint body portion or joint-free body portion such as the forearm extending from the wrist to the elbow or the portion extending from the ankle to the knee, and comprises a housing having a contact surface to be applied to one selected body region; a first pair of measurement current supplying electrodes so placed on the contact surface that the one selected body region may be put in contact with the current electrodes; and a first pair of voltage measuring electrodes so placed on the contact surface between the pair of current electrodes that the one selected body region may be put in contact with the voltage electrodes.

A method and system to determine palatability (tenderness, juiciness, and flavor) of Eve foodstuffs (meat, fish, fowl, ft and vegetables) including the steps of, utilizing bioelectrical impedance analysis in a biological subject model for measurement and composition analysis; and a system of using the results of the utilizing step procedure to illustrate an objective scale of palatability; a ‘Palatability Index’.

A dehydration condition judging apparatus is disclosed. The apparatus comprises a bioelectric impedance measuring device; a dehydration condition judging unit; an judgement result displaying unit; an inform time determining unit; and an informing device. The bioelectric impedance measuring device supplies an alternating current to a body of a subject and measures a bioelectric impedance value. The dehydration condition judging unit judges a dehydration condition of the subject based on the measured bioelectric impedance value. The judgment result displaying unit displays the judged dehydration condition. The inform time determining unit determines an inform time. The informing device informs the subject at the determined inform time that it is time to measure the total amount of body water.

There are provided a shielded cable comprising a core wire for carrying an electrical signal, and a shield provided around the circumference of the core wire and connected to the core wire via a drive circuit, wherein the drive circuit has a band limiting circuit which decreases an output voltage in a predetermined frequency band; and an apparatus which acquires a bioelectrical impedance value or biological composition data by using the shield cable.

Measurements by use of a conventional caliper process require skills and experiences. Further, since different pregnant women gain and keep fats in their bodies in different ways, results of measurements of their body fats vary. To overcome the inconvenience, there is provided a system for measuring a percent body fat or a total body fat by a bioelectrical impedance method, which comprises first input means, second input means and computation means, wherein personal data of a patient such as a height and a body weight is input into the first input means, a weight of a fetal part is input into the second input means, and the computation means computes a percent body fat or a total body fat by subtracting the body weight input into the second input means from the body weight input into the first input means. Further, to overcome the inconvenience, there is provided a system for measuring a percent body fat by a bioelectrical impedance method which comprises first input means, second input means and computation means, wherein personal data of a patient such as a height and a body weight is input into the first input means, a weight of a fetal part is input into the second input means, and the computation means computes a percent body fat by subtracting the body weight input into the second input means from the body weight input into the first input means.

The invention discloses a product recommendation method and system based on skin detection. The product recommendation method comprises the following steps that (A) bioelectrical impedance data of the skin of a user are obtained through detection by means of a skin detector, and the bioelectrical impedance data are processed through conversion to obtain skin physiological data; (B) a mobile terminal acquires the obtained skin physiological data, compares the skin physiological data with a preset product corresponding table, and finds skincare product information corresponding to the skin physiological data; (C) the found skincare product information is displayed y the mobile terminal. According to the product recommendation method and system based on skin detection, the skin detector is arranged to obtain the current skin conditions of the user, the corresponding skincare product information is displayed to the user by the mobile terminal according to the current skin conditions, as a result, the user can timely and visually understand the current skin conditions of the user and select products suitable for the current skin conditions of the user according to the provided skincare product information, and consumers are prevented from making wrong choices due to wrong guidance of shopping guides.