Abstract: High blood pressure measurement accuracy can be achieved with a blood pressure monitor employing a double cuff structure. A blood pressure monitor of the present invention includes a pressing member that includes a pressure cuff having a bag shape capable of containing fluid and generates a pressing force toward a measurement site of a subject when the pressing member is wound around the measurement site and the pressure cuff is inflated, and a controller that controls an operation of the adjuster such that the fluid is contained in the sensing cuff in an amount corresponding to biometric information about the subject and the pressure cuff is inflated or inflated and deflated in this state when performing a blood pressure measurement, and calculates a blood pressure value of the subject based on an output from the pressure sensor.

Abstract: A method is directed to continuously, non-invasively, and directly measuring blood pressure, and includes providing a calibrated measurement device having a blood-flow control balloon and a sensor array. The method further includes placing the sensor array in a non-invasive manner over the surface of a patch of skin connected to an artery by adjoining soft tissues and inflating the blood-flow control balloon with a controlled amount of pressure. In response to the inflating of the blood-flow control balloon, changes in the artery geometry and forces are detected, via the sensor array, during a heartbeat cycle. The changes correspond to spatio-temporal signals from the artery or in the adjoining soft tissues. The spatio-temporal signals are measured and processed, via a controller, to determine blood-pressure parameters.

Abstract: Soft capacitive pressure sensors for continuous wearable health monitoring applications are described herein. Wrinkled gold thin films on elastomeric substrates are used as robust parallel plate electrodes to create a robust integration with the polymer, allowing repeated normal force to deform the thin film without failure. By incorporating micro-ridged structures that support the counter electrodes to create air cavities within the elastomeric dielectric layer, pressure sensitivity is further increased. The pressure sensors are configured to measure human physiological signals such as pressure exerted from a radial pulse on a skin's surface. The radial pulse pressure detected by the sensor can be correlated to an arterial blood pressure. Calibration of said pressure sensors using a neural network allows for determination of absolute blood pressure.

Abstract: A non-invasive system and method for measuring blood pressure variability includes a cuff (20) pneumatically connected to a pump (14) to inflate the cuff to be wrapped around a limb (21) of a subject. A pressure sensor (18) is associated with the cuff for measuring cuff pressure (52). A photoplethysmogram sensor (26) attached to a fingertip in the same limb (21) of the subject and placed distal to the cuff for monitoring blood flow and recording a pulse plethysmograph signal. A control unit (12) connected to the pressure sensor (18) and the photoplethysmogram sensor (26) for simultaneously recording the cuff pressure and the plethysmograph signal such that an empirical relationship is derived between the cuff pressure and an amplitude measure of the plethysmograph signal (54) to measure short-term variation in systolic and diastolic blood pressures at a frequency corresponding to respiratory cycle.

Abstract: A sphygmomanometer includes: a first fluid bag that is to be worn around a measurement site; first and second pulse wave sensors that are mounted on first fluid bag, and detect pulse waves of respective opposing areas of an artery running along measurement site; pressing parts that locally presses areas corresponding to first and second pulse wave sensors from an outer circumference side, opposite of an inner circumference side of first fluid bag where first and second pulse wave sensors are mounted. Blood pressure is calculated based on pulse transit time obtained from outputs from first and second pulse wave sensors, with first fluid bag in an unpressurized state and first and second pulse wave sensors being pressed by a pressing force of the pressing part. Blood pressure is calculated, for oscillometric blood pressure measurement, based on pressure within first fluid bag with first fluid bag in a pressurized state.

Abstract: Disclosed herein are embodiments of systems, methods, and products comprises an analytic server, which determines user health attributes by tracking the user’s behaviors and activities within a predetermined space. The analytic server receives tracking data from a set of sensors installed in the predetermined space. The sensors track a beacon worn by the user. The analytic server determines micro-locations and user behaviors based on the tracking data. The analytic server determines the coordinates of the sensors based on the sensor identifiers and maps the coordinates to regions by referring to a floor plan map. The analytic server determines the user behaviors and activities by aggregating the micro-locations and regions the user visited at different time. The analytic server determines the user’s health score based on the micro-locations and user behaviors by executing an artificial intelligence model. The analytic server determines a recommendation of premium based on the health score.

Abstract: Provided are an apparatus and method for measuring bio-information. The apparatus for measuring bio-information includes: a pulse wave sensor configured to emit light of multiple wavelengths onto an object, and detect the light to obtain multi-wavelength pulse wave signals when the light is reflected or scattered from the object; and a processor configured to: obtain a conversion signal that indicates a contact pressure between the object and the pulse wave sensor, based on the multi-wavelength pulse wave signals, obtain an oscillometric envelope based on the multi-wavelength pulse wave signals and the conversion signal, and obtain bio-information based on the oscillometric envelope.

Abstract: The present invention relates to an apparatus and method for determining blood pressure of a subject. To automatically trigger calibration the apparatus comprises a sensor signal input configured to obtain an arterial pulse wave sensor signal of the subject, a feature extraction unit configured to extract multiple features from the obtained arterial pulse wave sensor signal, an estimation unit configured to determine multiple blood pressure estimation values for individual extracted features and/or groups of extracted features and to determine the subject's blood pressure from said multiple blood pressure estimation values, a calibration unit configured to calibrate the estimation unit based on blood pressure reference measurements, and a calibration trigger unit configured to trigger calibration by the calibration unit if the multiple blood pressure estimation values diverge more than a divergence limit.

Abstract: Systems and methods for a storage unit are disclosed. A storage unit includes a container defining an interior storage space and an opening configured to provide access to the interior storage space, a door configured to open and close the opening, a heating/cooling mechanism configured to adjust a temperature in the interior storage space, a temperature sensor configured to monitor the temperature in the interior storage space. A control unit is configured to receive the temperature in the interior storage space, receive a required temperature of an item in the storage unit, receive a signal indicative of a distance of a delivery vehicle, and activate the heating/cooling mechanism based on the temperature, the required temperature, and the distance of the delivery vehicle. The heating/cooling mechanism is activated at a time configured to achieve the required temperature within the interior storage space when the delivery vehicle arrives at the storage unit.

Abstract: There is disclosed a vital sign measuring device (VSMD) for obtaining an indication of a person's blood pressure via the person's finger by means of a finger cuff having an inflatable bladder. Blood pressure may be determined without the use of any electromagnetic radiation, such as miniature dynamic light sensing (mDLS). Apparatuses and methods for obtaining an indication of other vital signs, including hematocrit and total protein, are also disclosed.

Abstract: In some examples, a method includes receiving a signal indicative of a blood pressure of a patient and identifying at least one first portion of the signal comprising a first characteristic of the signal exceeding a first threshold. The method also includes identifying at least one first portion of the signal comprising a second characteristic of the signal exceeding a second threshold, the first characteristic being different than the second characteristic. The method further includes determining a filtered signal indicative of the blood pressure of the patient by excluding the at least one first portion and the at least one second portion from the signal. The method includes determining a set of mean arterial pressure values based on the filtered signal and determining an autoregulation status of the patient based on the set of mean arterial pressure values.

Abstract: A forged-physiological-characteristic filtering device includes: a physiological characteristic scanning circuit for conducting a plurality of times of physiological characteristic scanning operations; a control circuit for acquiring a plurality of unverified-user physiological characteristics and generating a plurality of corresponding unverified-user action records, and for calculating time interval between two consecutive unverified-user physiological characteristics to generate corresponding unverified-user time interval records; and a secure circuit for respectively comparing the plurality of unverified-user physiological characteristics with a plurality of valid-user physiological characteristics, for respectively comparing the plurality of unverified-user action records with a plurality of valid-user action records, and for comparing the unverified-user time interval record with a valid-user time interval record.

Abstract: A forged-physiological-characteristic filtering device includes: a physiological characteristic scanning circuit for conducting a plurality of times of physiological characteristic scanning operations; a control circuit for acquiring a plurality of unverified-user physiological characteristics and generating a plurality of corresponding unverified-user action records, and for calculating time interval between two consecutive unverified-user physiological characteristics to generate corresponding unverified-user time interval records; and a secure circuit for respectively comparing the plurality of unverified-user physiological characteristics with a plurality of valid-user physiological characteristics, for respectively comparing the plurality of unverified-user action records with a plurality of valid-user action records, and for comparing the unverified-user time interval record with a valid-user time interval record.

Abstract: A forged-physiological-characteristic filtering device includes: a physiological characteristic scanning circuit for conducting a plurality of times of physiological characteristic scanning operations; a control circuit for acquiring a plurality of unverified-user physiological characteristics and generating a plurality of corresponding unverified-user action records, and for calculating time interval between two consecutive unverified-user physiological characteristics to generate corresponding unverified-user time interval records; and a secure circuit for respectively comparing the plurality of unverified-user physiological characteristics with a plurality of valid-user physiological characteristics, for respectively comparing the plurality of unverified-user action records with a plurality of valid-user action records, and for comparing the unverified-user time interval record with a valid-user time interval record.

Abstract: Blood pressure information measurement device includes cuff including first and second fluid bag accommodated in first fluid bag, pressure increase/reduction mechanism configured to increase and decrease pressure in first fluid bag internal space and pressure in an internal space of second fluid bag, control unit configured to control operation of pressure increase/reduction mechanism, pressure detection device configured to detect first fluid bag internal pressure, and calculation unit configured to calculate blood pressure information.

Abstract: A wearable blood pressure measuring device includes a strap structure, a micro gas pump and a pressure sensor. The strap structure is adapted to be worn by a user and has an outer surface and an inner surface. The micro gas pump is disposed on the strap structure. The pressure sensor is combined with the micro gas pump through an elastic medium, disposed on the inner surface of the strap structure and in contact with skin of the user for monitoring blood pressure. The micro gas pump is operated to drive gas, wherein the gas is transported into the elastic medium to inflate the elastic medium with the gas. The expanded elastic medium pushes the pressure sensor to press against the skin of the user for facilitating measurement of a blood pressure of a target artery by a flattening and scanning operation.

Abstract: An apparatus for estimating cardiovascular information includes: a main body; and a strap connected to the main body and formed to be flexible to be wrapped around an object, wherein the main body may include: a pulse wave measurer configured to measure, from the subject, a first pulse wave signal by using a first light of a first wavelength, and a second pulse wave signal by using a second light of a second wavelength, the first wavelength being different from the second wavelength; a contact pressure measurer configured to measure a contact pressure between the object and the pulse wave measurer; and a processor configured to extract a cardiovascular characteristic value based on the first pulse wave signal, the second pulse wave signal, and change in the contact pressure, and estimate cardiovascular information based on the extracted cardiovascular characteristic value.

Abstract: Indirect, oscillometric, digital blood pressure monitoring systems and methods enabling self-calibration to obtain absolute blood pressure values using algorithmic analysis of arterial pressure pulses to establish an oscillometric profile and compensate for intervening effects on digital arterial pressure. Proper algorithmic analysis is dependent upon proper positioning and maintained engagement of a digital cuff on the digit of a user and subsequent hydraulic coupling of the cuff to the arteries within the digit.

Abstract: A blood pressure measurement device including a measurement wave detection unit that detects a measurement wave that passed through a measurement region of a subject and generates a detection signal, a blood pressure analysis unit that repeatedly identifies a blood pressure of the subject by analyzing the detection signal, a state determination unit that determines whether or not the subject is in a sleep state, a change determination unit that determines whether or not a time change rate of the blood pressure exceeds a threshold value, and a measurement control unit that shortens a time interval where the blood pressure analysis unit identifies the blood pressure in a case where the state determination unit determines that the subject is in the sleep state and the change determination unit determines that the time change rate exceeds the threshold value.

Abstract: A sensor assembly of the present invention includes a fluid chamber. A pressure transmitting fluid disposed facing an artery passing portion of a part to be measured via a film which forms a part of an outer wall of the fluid chamber is accommodated in the fluid chamber. A pressure sensor is provided for detecting pressure of the pressure transmitting fluid as pressure applied to the artery passing portion of the part to be measured. Plate members each having a flat shape along a longitudinal direction of a wrist as the part to be measured are disposed on a side opposite to the part to be measured along the film.

Abstract: A fluid pressure detection device capable of accurately detecting a pressure change of a fluid flowing inside a tube includes a substrate, and piezoelectric elements on the top surface of the substrate. The substrate is substantially rectangular in shape. The piezoelectric elements are arranged along the longitudinal direction of the substrate with long sides of each of the piezoelectric elements substantially perpendicular to the long side of the substrate. The substrate has slits on both sides of each of the piezoelectric elements in the longitudinal direction of the substrate. When detecting the pressure, the tube is deformed with a bottom surface of the substrate.

Abstract: An ultrasonic medical monitoring device may include: at least one ultrasonic probe that scans a test subject to acquire an echo signal; a blood pressure measuring device that measures a blood pressure parameter of a peripheral artery of the test subject; a processor configured to receive the echo signal and process the echo signal to obtain a blood flow parameter, and to calculate a myocardial mechanic parameter that represents a synchronous coupling of a circulatory system of left ventricle-aorta-peripheral arteries circulation according to the blood flow parameter and the blood pressure parameter; and a display device that is coupled to the processor and displays the myocardial mechanic parameter.

Abstract: A non-invasive blood pressure measuring apparatus includes a host provided with a microprocessor coupled with an air pressure sensor. A pressurized cuff is an inflatable cuff with a gas tube connected with the air pressure sensor, and fastened to a body portion where user's artery blood flow can be blocked completely after air inflation. A pulse wave detector is fixed at a downstream position of the pressurized cuff according to the artery blood flow direction.

Abstract: A building monitoring system includes a sensor configured to sense a condition and collect sensor data related to the sensed condition. The building monitoring system also includes a server configured to receive the sensor data. The server is configured to analyze the sensor data to detect an undesirable condition and a threat from the undesirable condition within a structure and automatically issue a notification upon detection of the undesirable condition and the threat.

Abstract: The present invention relates to an apparatus (18) for providing a control signal for a blood pressure measurement device, comprising: an input interface (24) for obtaining a health state parameter being indicative of a health state of a patient (12); a processing unit (28) for determining one or more operation settings of a blood pressure measurement device (14) based on the health state parameter, said one or more operation settings including a parameter that can be adjusted at the blood pressure measurement device (14) when conducting a blood pressure measurement with the device and that affects a precision of said blood pressure measurement and a patient comfort resulting from said blood pressure measurement; and a control interface (30) for providing a control signal for a blood pressure measurement device (14) to perform a blood pressure measurement based on said one or more operation settings. The present invention further relates to a corresponding method.

Abstract: An example of a digital artery blood pressure monitor may include a tactile sensor array disposed on an inner surface of a cuff, the tactile sensor array including a plurality of capacitive sensors to detect pressure changes within a digital artery of a finger due to blood flow, where the pressure changes cause changes to capacitance values of one or more capacitive sensors of the tactile sensor array, and control circuitry coupled to the tactile sensor array to receive the capacitance values from the tactile sensor array, and determine a blood pressure based on the capacitance values.

Abstract: The present invention relates to a device and a method for detecting a peak of an intracranial pressure (ICP) waveform using a morphological feature of an arterial blood pressure waveform.

Abstract: A venous pressure measurement apparatus includes a pressure controller configured to change a pressure applied from a cuff to a portion of a body where a vein and an artery exist and to which the cuff is attached, a pulse wave detector configured to detect pulse waves from a pressure the cuff receives from the portion of the body, and a venous pressure calculating section configured to calculate a venous pressure based on the applied pressure and the pulse waves detected by the pulse wave detector during a period in which the applied pressure is changed. The pressure controller is configured to execute a plurality of measurement steps, the applied pressure being increased or reduced from an initial value in each of the measurement steps.

Abstract: An appliance includes a belt that is worn by being wound around a wrist. The appliance includes: at least a first display region that is positioned in an area of the belt that corresponds to a volar-side surface or a radius-side surface of the wrist; and a second display region that is positioned in an area of the belt that corresponds to a back-side surface of the wrist. During a blood pressure measurement period, first control for displaying ongoing blood pressure measurement information only on the first display region is performed, and during a period other than the blood pressure measurement period, second control for displaying information that needs to be displayed on the first or second display region is performed.

Abstract: An ultrasonic medical monitoring device may include: at least one ultrasonic probe attached to a body surface of a subject to scan the body surface and acquire an echo signal; a blood pressure measuring module to measure a blood pressure parameter of the subject; a processing module to receive the echo signal and process the echo signal into a blood flow parameter, the processing module being further configured to calculate a myocardial mechanic parameter according to the blood flow parameter and the blood pressure parameter; and a display module coupled to the processing module to display the blood pressure parameter, the blood flow parameter, and the myocardial mechanic parameter. The present device and method acquire the blood pressure parameter and the blood flow parameter using ultrasound and a blood pressure synchronous detection technique, and the myocardial mechanics parameters such as the systolic maximum elastance are calculated by a computer.

Abstract: Methods, computer systems, and computer readable media are provided for promoting positive activity patterns for users and facilitate long-term adherence to the activity patterns, such as by providing alerts or electronic reminders to ambulate in a fashion that is responsive to an individual's actual activity patterns and behaviors and compatible with routine activities in the workplace and home. In particular, embodiments of the present invention are directed to (1) measuring physical activity patterns during the waking hours of a human, and in some embodiments continuously measuring these activity patterns; (2) automatically ascertaining whether the patterns exhibit sufficient frequency and variability of activity such as confers certain health benefits; and (3) if the patterns do not manifest such features, to adaptively provide sensible reminders at irregular within-day intervals such as are likely to establish healthy patterns of ambulation and other light activity.

Abstract: A method for identifying cardiac dysrhythmia behavior may include acquiring pulse volume wave data from a sensor associated with a patient, and calculating metrics associated with peaks detected therein. The metrics may include differences in amplitudes of successive pulse volume peaks and differences in the times of occurrence of successive pulse volume peaks. A dispersion analysis of the time differences, obtained during a defined time window, may result in one or more time difference dispersion metrics. Amplitude differences may be compared to an amplitude baseline, and time differences may be compared to a time baseline. Cardiac dysrhythmia behavior may be identified by a combination of an amplitude difference outside of the amplitude baseline, a corresponding time difference outside of the time baseline, and the values of one or more time difference dispersion metrics.

Abstract: With the blood pressure meter of the present invention, a pump unit is connected via a first fluid path to a fluid bladder. The first fluid path extends straight in the Z direction between the pump unit and the fluid bladder, sends air supplied from the pump unit to the fluid bladder or sends air inside of the fluid bladder to a valve.

Abstract: The invention refers to a method of determining an indicator that is representative for a patient's volume responsiveness, comprising the following steps: (i) measuring a sequence of pulse signals of a patient; (ii) determining an envelope(signal)-curve based on the sequence of measured pulse signals; (iii) determining a fit(envelope(signal))-function based on the previously determined envelope(signal)-curve, the fit(envelope(signal))-function representing an idealized curve progression of the envelope(signal)-curve without comprising pulse variations caused by ventilation or respiration induced heart-lung interaction; (iv) determining respiratory pulse variation signals corresponding to the pulse variations caused by ventilation or respiration induced heart-lung interaction; (v) determining an envelope(respiration)-curve based on the previously determined respiratory pulse variation signals; (vi) determining a fit(envelope(respiration))-function based on the previously determined envelope(respiration)-curve,

Abstract: Disclosed are systems and methods for timing measurements in a non-invasive blood pressure measurement system. The systems and methods are capable of providing measurement results according to patient-specific time intervals. The disclosed systems may include a pump unit, signal acquisition circuit, user interface, clock, memory, microprocessor, power unit and communications module. The disclosed invention also contains a method for calculating an expected measurement duration. Additionally systems and methods for providing blood pressure results according to patient-specific time intervals using an expected measurement duration are discussed. Related apparatus, systems, methods and or/articles are described.

Abstract: A bodily information measurement apparatus includes a band-shaped belt to be wrapped around a measurement site; a main body that is connected to a base end portion in the lengthwise direction of the belt and on which a pressure detection unit and a fluid supply unit are mounted; and a fastening unit for fastening the base end portion and the leading end portion of the belt. The belt is formed by stacking an outer circumferential layer and a fluid bladder for compressing the measurement site. The bodily information measurement apparatus is attached to the measurement site due to the base end portion and the leading end portion being fastened by the fastening portion in a state in which the fluid bladder and the leading end portion of the belt overlap.

Abstract: A method of measuring blood pressure, including: sensing an atmospheric pressure, an applied pressure, and a blood pressure of a blood vessel delivered to a skin and outputting an electrical signal indicating a result of sensing the pressures; dividing the electrical signal into a divided electrical signal which includes a direct current (DC) signal and an alternating current (AC) signal; processing the divided electrical signal; calculating the applied pressure using the processed electrical signal; and calculating a blood pressure average using the calculated applied pressure and a swing value of the processed electrical signal.

Abstract: A monitoring device includes a sensor band configured to be secured around an appendage of a subject, and a sensing element movably secured to the sensor band via a biasing element. The sensor band has a first mass, and the sensing element has a second mass that is less than the first mass. The biasing element is configured to urge the sensing element into contact with a portion of the appendage, and the biasing element decouples motion of the band from the sensing element. A monitoring device includes a band that is configured to be secured around an appendage of a subject. One or more biasing elements extend outwardly from the band inner surface and are configured to contact the appendage. A sensing element is secured to the band inner surface. The one or more biasing elements decouples motion of the band from the sensing element.

Abstract: An apparatus configured to quantify and display a time buffer for at least one patient during a blood treatment session is described. A blood treatment apparatus which includes such an apparatus or is in signal communication therewith, and a method for quantifying and presenting the time buffer for at least one patient at a blood treatment session are also described, as well as a computer program, a computer program product and a digital storage medium.

Abstract: A blood pressure information measurement device cuff includes a fluid bladder, an outer cover, a first loop-shaped ring, and a second loop-shaped ring. The first loop-shaped ring is provided closer to one end portion of the outer cover than the position where the fluid bladder is located, and has an insertion hole for passing through and bending back another end portion of the outer cover. The second loop-shaped ring is provided on a front surface of the outer cover, and has an insertion hole for passing through the other end portion of the outer cover that has been passed through the first loop-shaped ring. According to the blood pressure information measurement device cuff, it is possible to repeatedly recreate the same fitted state with ease when the cuff is fitted to a measurement area.

Abstract: Provided are a blood pressure estimation device, and the like, the device being capable of accurately estimating blood pressure. The blood pressure estimation device includes a blood pressure estimation unit which estimates a blood pressure on the basis of a pressure in a specific time period and differences between a plurality of pulse wave signals measured in the specific time period due to the pressure.

Abstract: Provided is a blood pressure measuring apparatus including: a pressurizing unit applying pressure to a blood vessel according to a first condition or a second condition; a pressure sensor sensing a sphygmus wave and a pressure of the blood vessel from the blood vessel under the first condition or the second condition; a standard blood pressure calculating unit for calculating a systolic standard blood pressure and a diastolic standard blood pressure; a continuous blood pressure calculating unit for calculating continuous blood pressure; and a repressurizing determining unit for determining whether pressure is applied to the blood vessel under the second condition during measuring of continuous blood pressure.

Abstract: A blood pressure measuring apparatus which measures a blood pressure in a step of gradually changing a cuff pressure adapted to press an artery, includes: a pulse wave detecting unit; a pulse wave interval measuring unit; a waveform information storing unit; a change trend calculating unit; a waveform information comparing unit; and a determining unit which, when first two of the pulse waves, which are successively detected at different cuff pressures, satisfy a predetermined condition: that a magnitude relationship between the amplitudes of the first two of the pulse waves is consistent with the change trend of the first two of the pulse waves; that the pulse wave interval between the first two of the pulse waves is within a predetermined range; and that the waveform information of the first two of the pulse waves approximately coincide with each other, determines that the amplitude of latter one of the first two of the pulse waves is to be used for calculating the blood pressure value.

Abstract: To provide a training apparatus for effective and safe performance of KAATSU training. A training apparatus is made up of a tight fitting band 100, a main device 200, a measuring segment 300, and a control segment 400. The tight fitting band 100 is wrapped around a predetermined region of a limb. The tight fitting band 100 has an air-tight inflatable bag. The compression force applied to the limb can be varied by supplying the air to and removing the air from the inflatable bag. The main device 200 controls the supply and removal of the air into and from the inflatable bag. The measuring segment 300 is attached to the limb around which the tight fitting band 100 is wrapped to measure the magnitude of a pulse wave.

Abstract: A method is provided for determining a threshold (81, 82) for spike (12) detection in an electrophysiological signal (11). The method comprises a step of determining an estimated envelope (31) of the electrophysiological signal (11), a step of, based on the estimated envelope (31), determining an estimated Gaussian noise, a step of determining a distribution (51) of instantaneous amplitudes of the estimated Gaussian noise, a step of determining a mode (61) of the distribution (51) of instantaneous amplitudes, and determining the threshold (81, 82) based on the mode (61) of the distribution (51) of instantaneous amplitudes.

Abstract: A power supply unit of an electronic sphygmomanometer includes a dry cell as a primary battery, a rechargeable battery as a secondary battery, and a power supply control circuit. A voltage detector detects a voltage (characteristic value) of the rechargeable battery, and a voltage detector detects the voltage of the dry cell. A switching control unit performs switching control of the dry cell and the rechargeable battery based on a detection result by the voltage detectors.

Abstract: A blood pressure measurement apparatus includes a derivation control unit that performs derivation control to derive a blood pressure of a measured person. The derivation control unit includes an envelope extracting unit to extract an envelope of a volume pulse wave based on an arterial volume signal, a differential processing unit to differentiate the envelope with respect to a cuff pressure, a maximum value extracting unit to extract a maximum value of a differential value of the envelope, and a blood pressure decision unit that decides the cuff pressure used for the differential of the maximum value as a blood pressure.

Abstract: A blood pressure measuring apparatus which measures a blood pressure in a step of gradually changing a cuff pressure adapted to press an artery, includes: a pulse wave detecting unit; a pulse wave interval measuring unit; a waveform information storing unit; a change trend calculating unit; a waveform information comparing unit; and a determining unit which, when first two of the pulse waves, which are successively detected at different cuff pressures, satisfy a predetermined condition: that a magnitude relationship between the amplitudes of the first two of the pulse waves is consistent with the change trend of the first two of the pulse waves; that the pulse wave interval between the first two of the pulse waves is within a predetermined range; and that the waveform information of the first two of the pulse waves approximately coincide with each other, determines that the amplitude of latter one of the first two of the pulse waves is to be used for calculating the blood pressure value.

Abstract: Measured blood pressure data is stored in a memory in association with information related to a measurement time. In response to manipulation of a manipulation portion (memory recall switch), blood pressure data associated with the measurement time within a prescribed time period (for example, 10 minutes) from the measurement time of reference blood pressure data, among the blood pressure data stored in the memory, is retrieved as specific data. Then, an average value is calculated based on the specific data, and the calculated average value is displayed as an evaluation index.

Abstract: Systems and methods are provided for patient monitors which apply phase detection operations to analog signals to identify differential pulse transit time (DPTT). Photoplethysmograph (PPG) signals measured at two sensor sites may be processed by a phase detection system to identify phase information that allows the calculation of a DPTT. The phase detection system may process analog PPG signals in the analog domain to determine phase information. In some embodiments, the phase detection system may process optical oximetry sensor signals to determine phase information using, for example, interferometric methods.