Abstract: Methods and systems for determining blood pressure from a pressure signal are disclosed. A patient's blood pressure may be determined by analyzing features of a wavelet transformation of a pressure signal obtained during an occlusion procedure. Ridges in a scalogram of the transformed signal may be identified and used to determine an envelope of a pressure oscillation signal, to which oscillometric blood pressure determination techniques may be applied.

Abstract: An electronic sphygmomanometer, which measures blood pressure in accordance with the volume compensation method, detects a cuff pressure inside a cuff attached to a measurement site of the blood pressure. An arterial volume detection circuit detects an arterial volume signal of the measurement site. A drive control unit, after setting the cuff pressure to an initial cuff pressure, servo-controls a cuff pressure adjustment unit so that a volume of an artery becomes constant, based on the detected arterial volume signal. While the servo control is being performed, an arterial volume change amount is detected based on the detected arterial volume signal.

Abstract: An improved method and apparatus for non-invasively assessing one or more hemodynamic parameters associated with the circulatory system of a living organism. In one aspect, the invention comprises a method of measuring a hemodynamic parameter (e.g., arterial blood pressure) by applanating or compressing portions of tissue proximate to the blood vessel of concern until a desired condition is achieved, and then measuring the hemodynamic parameter. Such applanation effectively mitigates transfer and other losses created by the tissue proximate to the blood vessel, thereby facilitating accurate and robust tonometric measurement. An algorithm adapted to maintain optimal levels of applanation is also described. Methods and apparatus for scaling such hemodynamic parameter measurements based on subject physiology, and providing treatment to the subject based on the measured parameters, are also disclosed.

Abstract: A blood pressure measurement cuff comprising an inflatable bladder, a source of fluidic pressure in fluidic communication with the inflatable bladder, a manometer in fluidic communication with the inflatable bladder, a cover at least partially covering the inflatable bladder and comprising an antimicrobial substance, and means to place the inflatable bladder sufficiently close to a limb of a living being to allow the measurement of the blood pressure of the living being. The source of fluidic pressure can be a pump that transforms human force into fluid pressure, such as a squeezable ball pump, or a canister of compressed fluid. The manometer can include a dial display or a digital display. The cuff can further comprise a tube providing fluidic communication between the manometer and the inflatable bladder, and the tube can be 1 foot or longer. The cover can be made of a fabric coated with an antimicrobial substance.

Abstract: A high-accuracy blood pressure value deriving method that is hardly influenced by individual differences of a person to be measured is provided. A blood pressure measuring apparatus includes a cuff member comprising a compression air bladder, a sub air bladder, and a pulse wave detection air bladder, pressure control means for pressurizing or depressurizing each air bladder, a pressure sensor which senses the internal pressure of each air bladder, pulse wave signal extracting means for extracting time-series data of a pulse wave signal superposed on a cuff internal pressure, in the process during which the pressure control means pressurizes or depressurizes each air bladder, and blood pressure value deriving means for deriving a systolic blood pressure value and/or a diastolic blood pressure value based on a change in feature amount of the pulse wave signal and a cuff internal pressure at a point of time of the change.

Abstract: Single- or dual-bladder devices for remote ischemic preconditioning and blood pressure monitoring are disclosed along with various oscillometry-based and other methods for detecting systolic and diastolic blood pressure while the ischemic preconditioning treatment is in progress. The devices and methods of the invention provide for delivery of ischemic preconditioning at the lowest effective cuff pressure while closely monitoring patient's hemodynamics. Advantageously, the device of the invention allows both ischemic preconditioning and blood pressure monitoring to be done on the same limb. Disposable battery-powered version of the device of the present invention is especially useful for emergency use with patients suffering from acute myocardial infarction, acute stroke, or acute trauma. Additional device configurations are described for use in a percutaneous intervention and vascular sealing settings.

Abstract: A blood pressure monitoring apparatus including a pressing unit which presses a measurement body part of a subject, a sensing unit which senses a sphygmus wave at the measurement body part while the measurement body part is being pressed, a control unit controlling a point of time of stopping the pressing based on an amplitude of the sensed sphygmus wave, and an estimation unit which estimates a blood pressure of the subject based on the sphygmus wave sensed before the pressing performed by the pressing unit is stopped.

Abstract: A blood pressure measuring apparatus includes a sensing unit including a plurality of sensors sensing sphygmus waves at a measurement site, a selection unit selecting one sensor of the plurality of sensors based on the sphygmus waves sensed by the plurality of sensors, and a blood pressure estimation unit estimating blood pressure of the measurement site based on a sphygmus wave sensed by the selected sensor.

Abstract: A method for estimating blood pressure includes: sensing a value of a first sphygmus wave in a region of a user's body while pressurizing the region with a first pressure; sensing a value of a second sphygmus wave in the region while pressurizing the region a second pressure; and estimating blood pressure of the region based on the sensed values of the first sphygmus wave and the second sphygmus wave. The first pressure and the second pressure are each either a variable pressure or a constant pressure. A height of the region, relative to the user's body, is different for the sensing the value of the first sphygmus wave than for the sensing the value of the second sphygmus wave.

Abstract: A sphygmomanometer cuff includes a fluid bag, a curved elastic member, a cushion material, and an outer package body. The fluid bag is arranged around an arm of a subject and compresses the arm. The curved elastic member is arranged to overlap an outer side of the fluid bag with respect to the arm, formed in a substantially tubular shape extending in a predetermined axial direction, and elastically deformable in a radial direction thereof. The cushion material is arranged at a position projecting from an end of the curved elastic member in the axial direction and more easily compression deformed than the curved elastic member. The outer package body accommodates the fluid bag, the curved elastic member, and the cushion material.

Abstract: An apparatus for assessing cardiovascular status of a mammal comprises a system for locally applying a pressure to an artery capable of restricting blood flow through said artery, a wideband external pulse transducer having an output and situated to measure suprasystolic signals proximate to said artery, and a computing device receiving said output for calculating vascular compliance values. The method described is particularly useful for determining cardiac output, assessing whether a pregnant female has preeclampsia or a patient has cardiac insufficiency, or assessing cardiac arrhythmias.

Abstract: This invention provides a user with information by which the reliability of a measured blood pressure value can be determined. A blood pressure measurement device includes a cuff which presses a blood pressure measurement portion, a pressure control means for pressurizing or depressurizing the interior of the cuff, a pressure sensor which senses the internal pressure of the cuff, a pulse wave signal extracting means for extracting time-series data of a pulse wave signal superposed on the cuff internal pressure sensed by the pressure sensor, in the process in which the pressure control means pressurizes or depressurizes the cuff, and a display means for displaying a pulse waveform corresponding to a pulse wave signal of at least one period, together with the value of a cuff internal pressure corresponding to the pulse wave signal, based on the extracted pulse wave signal time-series data.

Abstract: A method for estimating an intra-arterial blood pressure waveform, from pressure waveforms obtained from a blood pressure cuff, comprises the steps of: a. inflating a blood pressure cuff on a brachial artery of an arm to a pressure at least as great as the diastolic pressure; b. holding the molar amount of fluid in the blood pressure cuff constant; c. sensing a sequence of cuff pressure waveforms associated with the brachial artery that result from at least one cardiac ejection cycle; and cc.

Abstract: A sphygmomanometer cuff is used by being wrapped around an upper arm, and includes an air bladder, a cover body, and a cushion material. The air bladder is inflated/contracted by in/out of fluid, and includes a compression acting surface positioned on the upper arm side when the sphygmomanometer cuff is wrapped around the upper arm. The cover body internally includes the air bladder, and includes an inner peripheral side sheet portion positioned on the upper arm side when the sphygmomanometer cuff is wrapped around the upper arm. The cushion material is positioned on the inner peripheral side sheet portion side than the compression acting surface, and is compressible in a direction parallel to a thickness direction of the inner peripheral side sheet portion. According to such a configuration, the internal bleeding at the measuring site that may occur when measuring the blood pressure is reliably prevented.

Abstract: An apparatus for assessing cardiovascular status of a mammal comprises a system for locally applying a pressure to an artery capable of restricting blood flow through said artery, a wideband external pulse transducer having an output and situated to measure suprasystolic signals proximate to said artery, and a computing device receiving said output for calculating vascular compliance values. The method described is particularly useful for determining cardiac output, assessing whether a pregnant female has preeclampsia or a patient has cardiac insufficiency, or assessing cardiac arrhythmia.

Abstract: It is an object to provide a blood pressure monitor, wherein the noise caused by the friction of overlapping parts of a cuff can be inhibited during automatic elevation in the cuff pressure, and reliability in the automatic elevation of cuff pressure can be significantly enhanced. A cuff (1) is used in a blood pressure monitor to measure a blood pressure in a rolled condition where one end of the cuff (1) is wound within the other end thereof, wherein a cushion member (6) made of a raised fabric (61) is provided in at least one of surfaces at one end and the other end of the cuff (1) which rub against each other.

Abstract: Provided are a pressurizing module and a blood pressure measuring device including the pressurizing module. The pressurizing module includes a driving block optionally discharging compressed air; and a bellows-type airbag formed to overlap with the driving block, and comprising an inner space accommodating the compressed air discharged from the driving block, a plurality of wrinkles flattened so as to expand the inner space, and a pressurizing surface formed at an end portion of the wrinkles and spaced apart from the driving block as the inner space expands.

Abstract: Provided are an apparatus and method for measuring blood 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 method and system for automatically detecting pulsus paradoxus. In one embodiment, the method includes automatically detecting pulsus paradoxus based upon a consideration of a blood pressure component, an audio component indicative of Korotkoff sounds and a respiratory component. The system includes a plurality of input modules for determining a blood pressure, a Korotkoff sound and a respiration of a subject. The system further includes a computing device coupled to the input modules for automatically determining a presence of pulsus paradoxus based on the blood pressure, the Korotkoff sound and the respiration of the subject.

Abstract: A non-invasive arterial blood pressure monitor uses an inflatable cuff that incorporates the first bladder that is filled with non-compressible liquid or gel. The bladder can be pressurized by an action of a pressurizing device superimposed onto its outer surface. In a preferred embodiment, a pressurizing device is an air-filled second bladder being connected to an air pump and bleed valve. The first bladder is positioned between the patient's body and the second bladder. During operation, the second bladder compresses the first bladder, which, in turn, compresses the patient's artery against the supporting bone. The mechanical coupling between the blood-filled artery of a patient and the liquid-filled bladder of a dual-bladder cuff is improved for detecting pressure oscillations in a broad frequency range. The pressure sensor that is coupled to the first bladder also functions as a hydrophone for picking-up the mechanical oscillations from any part of the occluded limb or digit.

Abstract: Current noninvasive blood pressure measurement methods are not able to measure pressure during nonpulsatile blood flow. We propose method to measure intravascular or other compartment pressure which applies extrinsic pressure oscillation. Pressure-volume response of the compressed structure is obtained and compartment pressure is estimated as the extrinsic pressure at which compressed structure has the highest compliance. Delivering extrinsic oscillations at a higher frequency than the pulse rate, pressure reading can be obtained much faster. Because it is not dependant on intrinsic vascular oscillations, pressure can be measured during arrhythmias, during cardiac bypass, during resuscitation, in the venous compartment or in the other nonpulsatile compressible body compartments.

Abstract: A method of measuring blood pressure includes measuring a characteristic of body fat of a measured body part, detecting a sphygmus wave and a pressure of a blood vessel of the measured body part, detecting a base blood pressure of the measured body part based on a result of the detecting the sphygmus wave and the pressure of the blood vessel of the measured body part, and detecting a continuous blood pressure using a blood pressure calibration. The blood pressure calibration uses the base blood pressure and a blood pressure calculation regression equation including the characteristic of the body fat.

Abstract: A blood pressure monitor having a wireless transmitter is disclosed. A pressure sensor measures blood pressure data from a target, and the blood pressure data is transmitted to a remote device through the wireless transmitter. In one embodiment, the remote device is a mobile phone or a PDA. An alternate blood pressure monitor having an electronic display unit displaying the instantaneous pressure inside a cuff is also disclosed. In an embodiment, the blood pressure monitor computes the blood pressure value of the target, and the user can choose the measuring mode of the blood pressure monitor.

Abstract: A method for non-invasively estimating blood pressure is disclosed herein. The method includes inflating a cuff and collecting first oscillation amplitude data at a first plurality of cuff pressure levels while inflating the cuff. The method includes identifying an artifact in the first oscillation amplitude data. The method includes identifying a specific cuff pressure level where the artifact occurs and deflating the cuff to the specific cuff pressure level. The method includes collecting second oscillation amplitude data at the specific cuff pressure level and estimating a blood pressure parameter based on both the first oscillation amplitude data and the second oscillation amplitude data. A non-invasive blood pressure system is also disclosed.

Abstract: A blood pressure measurement bladder (50) has a predetermined amount of air introduced and sealed therein. A CPU (30) measures in advance the P-V property. The blood pressure measurement bladder (50) is wrapped around a measurement site. By exerting pressure from the outer side to the blood pressure measurement bladder (50), the internal pressure in the blood pressure measurement bladder (50) is increased to exert pressure on the blood vessel. During this process, the cuff pressure in the blood pressure measurement bladder (50) generated by volumetric change of the blood vessel by changing the pressure exerted from the outer side to the blood pressure measurement bladder (50), and the pressure pulse wave data are detected. By adding the cuff compliance property obtained by the P-V property that was measured in advance to the detected data as a correction value of the pressure pulse wave, blood pressure is calculated.

Abstract: An electronic manometer detects pressure within a cuff at which an amplitude of change in a volume of an artery of a measurement subject becomes a maximum by detecting volume of an artery of a measurement subject while superimposing a vibration of high frequency during a period of raising the pressure to apply on the cuff or during a period of lowering after raising to greater than or equal to a systolic blood pressure of the measurement subject. The electronic manometer controls the pressure to apply on the cuff so that the volume of the artery of the measurement subject becomes constant, and measures the blood pressure of the measurement subject from an increased or decreased value of the pressure to apply.

Abstract: The invention relates to a blood pressure manometer comprising a housing, a cuff connected to the housing, a cuff storage element in which a section of the cuff can be retracted to adjust the width of the cuff, and a cuff tightener which pulls the cuff section into the cuff storage element with a pre-determined tractive force. The cuff tightener comprises a pre-tensioned spring drive and a detachable withdrawal blocking element which prevents the cuff from withdrawing counter to the spring drive. The spring drive causes the cuff to automatically tighten with a pre-determined force, ensuring reproducible measuring results. The cuff storage element and the cuff tightener can be integrated into or engaged in a locking manner with the housing. An automatic switch-on mechanism switches the appliance on as soon as the cuff storage element is locked to the housing when the cuff is positioned on the limb.

Abstract: A physics-based mathematical model is used to estimate central pressure waveforms from measurements of a brachial pressure waveform measured using a supra-systolic cuff. The method has been tested in numerous subjects undergoing cardiac catheterisation. Central pressure agreement was within 11 mm Hg and as good as the published non-invasive blood pressure agreement between the oscillometric device in use and the so-called “gold standard.” It also exceeds international standards for the performance of non-invasive blood pressure measurement devices. The method has a number of advantages including simplicity of application, fast calculation and accuracy of prediction. Additionally, model parameters have physical meaning and can therefore be tuned to individual subjects. Accurate estimation of central waveforms also allow continuous measurement (with intermittent calibration) using other non-invasive sensing systems including photoplethysmography.

Abstract: In wrapping a blood pressure measurement cuff enclosing therein a bladder, which is inflated when supplied with air, around a region for measurement, first, a predetermined amount of air is supplied to the bladder and then enclosed therein. Then, the blood pressure measurement cuff is wrapped around the region for measurement of a subject for the purpose of measuring his/her blood pressure. During this wrapping process, relative variations in the pressure in the bladder are sequentially detected. The time period in which the detection results indicate that the variation has not reached a predetermined threshold value, the wrapping proceeds. When the detection results indicate that the variation has reached the predetermined threshold value, the wrapping is terminated.

Abstract: For each blood pressure measurement, measured blood pressure data output by a blood pressure calculation unit is stored in a memory. On this occasion, the number of times of measurement is incremented by a number of times of measurement update unit, and data on the incremented number of times of measurement is stored in the memory. Based on information read from the memory, a number of times display data generation unit generates display data for a count result of the number of times of blood pressure measurement, and supplies the generated display data to a display control unit. Based on the supplied data, the display control unit displays the count result of the number of times of blood pressure measurement on a display unit.

Abstract: An apparatus for evaluating a vascular endothelial function includes: a cuff, to be wound around a part of a body of a subject; a cuff pressure controller, configured to control a pressure of the cuff, and configured to apply continuous pressure stimulation; a cuff pressure detector, configured to detect the pressure of the cuff from output of a pressure sensor connected to the cuff; a pulse wave detector, configured to detect, from the output of the pressure sensor, pulse waves before and after the continuous pressure stimulation is applied; and an analyzer, configured to evaluate the vascular endothelial function by comparing the pulse waves detected before and after the continuous pressure stimulation is applied.

Abstract: The apparatus and methods of the present invention provide a non-invasive measurement of blood pressure with a frequency that approximates a continuous measurement. Blood pressure measurement provides information that is both clinically and diagnostically significant. In accordance with an aspect of the present invention, a method for providing a non-invasive measurement of blood pressure, includes obtaining a first input signal and a second input signal indicative of systolic blood pressure and diastolic blood pressure, respectively; tracking a signal indicative of pulse pressure; continuously measuring a third signal indicative of mean blood pressure; and processing the signals to obtain a measurement indicative of systolic and diastolic blood pressure, wherein at least a portion of the measurement indicative of systolic and diastolic blood pressure is continuous.

Abstract: An improved device and method is provided for accurately and consistently measuring blood pressure. The device includes a body having an insufflation bulb attached thereto. The bulb is connected to a blood pressure cuff. The cuff can be inflated using the insufflation bulb. A pressure release valve is then opened to slowly relieve pressure from the cuff, while the operator listens for the Korotkoff sounds using a stethoscope. A button on the body of the device is pressed by the operator when the systolic and diastolic sounds are heard. The device automatically records the pressures without the need for a visual reading when the button is depressed.

Abstract: The present invention relates to a device and a method for estimating central systolic blood pressure based on oscillometric signals from brachial artery by the use of a pressure cuff.

Abstract: Provided is a non-invasive electronic method and apparatus for measuring blood pressure, in which the data is processed with an algorithm of non-linear fitting for recovering trend envelope of an oscillating PW by a firmware, so that the trend envelope of PW amplitude can be recovered accurately, and the obtained average pressure shows higher degree of agreement with the real situation in clinic. In this apparatus, a 3-way solenoid valve (20) is arranged between a cuff (10) and a first pressure sensor (30), wherein the common port of the 3-way solenoid valve (20) is connected with the first pressure sensor (30), the normally open port thereof connected with the cuff (10), and the normally closed port thereof connected with the air atmosphere during zeroing process. Moreover, an independent timing circuit (45) is provided additionally. In the measurement method of the present invention, the zeroing is performed with the help of the 3-way solenoid valve (20).

Abstract: A method and system for analyzing sounds originating in at least a portion of an individual's cardiovascular system. N transducers, where N is an integer, are fixed on a surface of the individual over the thorax. The ith transducer is fixed at a location xi and generates an initial signal P(xi,i) indicative of pressure waves at the location xi, for i=1 to N. the signals P(xi,t) are processed so as to generate filtered signals in which at least one component of the signals P(xi,t)not arising from cardiovascular sounds has been removed. The filtered signals may be used for generating an image of the at least portion of the cardiovascular system.

Abstract: An externally-connected expandable blood pressure meter includes an electronic blood pressure meter which has a measuring unit to output an inspected signal based on a measured blood pressure and a processing unit to receive the inspected signal and execute signal transformation according to an output interface, and an external connection port located on the electronic blood pressure meter and electrically connected to the processing unit to provide a single expansion output device to output inspected results contained in the inspected signal. The output interface is located on the expansion output device.

Abstract: A method and apparatus for continuous measurement of blood pressure, based on pulse transit time, which does not require any external calibration. This technique, referred to herein as the ‘composite technique’, is carried out with a body-won sensor that measures blood pressure and other vital signs, and wirelessly transmits them to a remote monitor. A network of disposable sensors, typically placed on the patient's right arm and chest, connect to the body sensor and measure a time-dependent electrical waveform, optical waveform, and pressure waveform. The disposable sensors typically include an armband that features an inflatable bladder coupled to a pressure sensor, at least 3 electrical sensors (e.g. electrodes), and an optical sensor (e.g., a light source and photodiode) attached to a wrist-worn band.

Abstract: A method and system for operating a non-invasive blood pressure monitor that utilizes an SpO2 plethysmographic signal to reduce the time required to obtain an estimation of a patient's blood pressure. During operation of the NIBP monitor, the NIBP monitor utilizes the SpO2 plethysmographic signal to determine a timing period and a deflation period for each pulse associated with the patient's heartbeat. Upon receiving an oscillation pulse, the NIBP monitor determines the oscillation amplitude during the timing period and deflates the blood pressure cuff during the deflation period immediately following the timing period. Preferably, the deflation period occurs during the same oscillation pulse used to calculate the oscillation pulse amplitude to decrease the amount of time required to obtain a blood pressure estimate from the patient.

Abstract: To provide a technique which makes it possible to obtain a proper pulse wave signal for high-accuracy blood pressure measurements, thereby saving the trouble of taking measurements repeatedly and reducing a physical burden imposed on the user by cuff pressure.

Abstract: A system to monitor heart sounds, such as to detect a worsening condition of heart failure decompensation. The system comprises a medical device that includes an implantable multi-axis heart sound sensor, operable to produce, for each of at least two nonparallel axes, an electrical signal representative of at least one heart sound, the heart sound associated with mechanical activity of a patient's heart. The device further includes a controller circuit coupled to the heart sound sensor. The controller circuit measures components of the heart sound that respectively correspond to each of the axes.

Abstract: A method for the continuous non-invasive measurement of blood pressure includes at least one first pressure cuff and one second pressure cuff of comparable or identical size, each cuff including an inflatable pressure measuring chamber applicable to a first and a second body part or region containing an artery. The first pressure cuff has a first plethysmographic sensor connected to a regulating and control device used to regulate the pressure in a first pressure measuring chamber by means of a measuring signal of the plethysmographic sensor. The first pressure measuring chamber is connected to a pressure sensor in order to obtain a pressure measuring signal. The second pressure measuring chamber is a reference pressure chamber that can be regulated at the same time as the first pressure measuring chamber, independently therefrom, and can be regulated by the regulating and control device according to a pre-determinable pressure function.

Abstract: A method and system for operating a non-invasive blood pressure monitor that utilizes an SpO2 plethysmograph signal to determine the initial inflation pressure for the blood pressure cuff of the NIBP monitor. A pulse sensor is placed on the patient's limb distal to the blood pressure cuff such that as the blood pressure cuff is inflated, the pulse signals from the pulse sensor will be reduced. When the blood pressure cuff reaches systolic pressure, the pulse signals from the pulse sensor will be initially attenuated and eventually eliminated, thus providing an indication that the cuff pressure has reached systolic pressure for the patient. The central processor of the NIBP monitor compares the pulse signals during cuff inflation to an average pulse signal and terminates the inflation of the blood pressure cuff upon sufficient attenuation.

Abstract: A blood pressure manometer comprises a body and a separate display, and the body and separate display are provided with first and second communication parts, respectively. The first communication part has a light emitting element and is configured so that the element sends an infrared signal including blood pressure data. The second communication part has a light receiving element and is configured so that the light receiving element receives the infrared signal including the blood pressure data from the first communication part. The light emitting element is supported by the body to be opposite a subject even if a blood pressure measuring portion of the body measures the subject's blood pressure from any of the subject's left and right regions. The light receiving element is supported by the separate display to received the infrared signal which is sent from the light emitting element to be reflected on the subject.

Abstract: A manually pressurized electronic sphygmomanometer includes a casing, a display screen disposed on the casing and coupled to an electronic circuit, and a pressure detector in the casing. The pressure detector is coupled to an air current pipeline; the air current pipeline is sheathed onto an end of an interconnect pipe; the interconnect pipe disposed outside the casing has a manual pressurizing device at an end of the interconnect pipe and a pressure release adjusting knob at another end of the interconnect pipe for adjusting the flow of air discharged to the outside. An end of the interconnect pipe is coupled to an airbag, such that when the manual pressurizing device is pressurized, the pressurized air passes through the interconnect pipe to pressurize the airbag, and the pressure detector sends the detected blood pressure to the electronic circuit, and the detected blood pressure values are displayed on the display screen.

Abstract: A subject evaluation value measuring apparatus 10, functioning as a cuff volumetric pulse wave obtaining apparatus, includes a pulse wave determining device (i.e., a cuff volumetric pulse wave determining device) 52 that determines, using an inverse transfer function 1H(f), stored in a ROM (i.e., an inverse transfer function memory) 42, that corresponds to a pre-determined transfer function H(f) between input, i.e., pressure pulsation produced in a cuff 20, and output, i.e., pressure pulsation detected by a pressure sensor 24, a no-delay cuff volumetric pulse wave PK(t) having substantially no delay of transmission, based on an actual cuff pulse wave signal SM outputted by the pressure sensor 24. The thus determined cuff volumetric pulse wave PK(t) is free of waveform distortion and accordingly enjoys high accuracy.

Abstract: The present invention provides a condenser microphone capable of detecting small sounds (e.g., Korotkoff sounds) with high sensitivity even in environments with variations in pressure, such as cuff pressure. A condenser microphone (10) is disposed as an acoustic sensor for detecting Korotkoff sounds in a communication space reachable by the internal pressure of the cuff of a blood pressure gauge. In the condenser microphone, a diaphragm (13) and a backplate 14) are disposed in the interior of a housing (11), an aeration hole (30) is formed in a wall (11B) that blocks off the housing back surface, and a sound-absorbing element (20) having sound absorption characteristics with respect to a frequency band targeted for detection is disposed on the front surface of a housing (11).

Abstract: A plurality of cushions are provided in the airbag of a cuff apparatus, spaced apart from one another and thus maintaining the airbag in an inflated state before compressed air is introduced into the airbag. This shortens the time required to supply the compressed air and minimizes the resistance to the body part being inserted into the cuff apparatus. Therefore, the body part can smoothly enter the cuff apparatus and the flow of blood can be sufficiently suppressed.

Abstract: The present invention discloses a method for automatically calibrating an electronic sphygmomanometer, which pumps air at a predetermined air pressure to a testing electronic sphygmomanometer to simultaneously pressurize a set of pressure sensors set for regular use and at least one other set of pressure sensors being interconnected in the electronic sphygmomanometer to detect whether or not the set of pressure sensors used at regular time is normal. The detected change of pressure during the detection is sent to a control module, and the control module will compare the detected value of each pressure sensor. If the comparison is matched, then it means that the set of pressure sensors used at regular time is normal; if the comparison is mismatched, then the pressure sensors are determined as abnormal and the air valve connected to such pressure sensors is shut, such that when a user uses the electronic sphygmomanometer for the next time, another set of pressure sensors will be started.