Abstract: Provided is a blood pressure measurement device capable of discharging a fluid from three cuffs even when either one of a pump valve or an on-off valve fails, that includes a pump including a pump valve; a first flow path including a first on-off valve and fluidly connecting the pump and a sensing cuff; a second flow path branching from the first flow path between the pump and the first on-off valve, including a second on-off valve, a third on-off valve, and a fourth on-off valve, and connecting the pump and atmosphere; a third flow path branching from an intermediate portion between the second on-off valve and the third on-off valve and fluidly connecting the pump and the tensile cuff; and a fourth flow path branching from an intermediate portion between the third on-off valve and the fourth on-off valve and fluidly connecting the pump and the pressing cuff.

Abstract: A blood pressure measurement device includes an outer case; a base; a pump provided on a surface of the base such that the pump is shifted from a center of the outer case and located on one side as viewed in a circumferential direction of a living body; a first pressure sensor and a second pressure sensor that are provided such that the first pressure sensor and the second pressure sensor are arranged side by side in the circumferential direction and located on one side as viewed in a direction orthogonal to the circumferential direction; and a first on-off valve and a second on-off valve that are provided such that the first on-off valve and the second on-off valve are arranged side by side in the circumferential direction with reference to the first pressure sensor and the second pressure sensor.

Abstract: A blood pressure cuff includes a smaller patient bladder extending laterally across the cuff and longitudinally along a minor portion of second and fourth perimeter segments of the cuff. The cuff also includes a larger patient bladder extending laterally across the cuff and longitudinally along a major portion of the second and fourth perimeter segments of the cuff. The smaller patient bladder and the larger patient bladder are fluidically isolated from each other. A small patient port projects through the smaller patient bladder on a first side of the cuff. A large patient port projects through the larger patient bladder on a second side of the cuff which is transversely opposite the first side.

Abstract: An extendable biosensing device comprising a robotic structure. The robotic structure comprises a pliable exterior lining and an extendable core. The robotic structure comprises at least one sensor located on or within the pliable exterior lining. The sensor is configured to measure a physiological condition. The extendable core automatically extends from a retracted state to a deployed state in response to a triggering event.

Abstract: A blood pressure monitor of the present invention includes a cuff to be wrapped around a measurement site. The blood pressure monitor includes a unit including, as elements for blood pressure measurement, a pump, a valve, a pressure sensor, and an inner pipe connecting the pump, valve, and pressure sensor such that fluid can pass therethrough. The blood pressure monitor includes a connecting pipe connecting the cuff and the inner pipe in the unit such that fluid can pass therethrough. The blood pressure monitor includes a self failure diagnosis unit configured to determine whether or not there is a failure in a fluid system including the pump, the valve, the pressure sensor, the inner pipe, the connecting pipe, and the cuff, in a state in which the cuff is empty-wrapped into a cylindrical shape and the capacity of the cuff is restricted.

Abstract: An electronic device includes a sensor, a memory, and a display, and a processor. The processor is configured to determine bio-information and blood pressure information of a user measured through the sensor, determine reliability of calibration of the blood pressure information, based on at least one of elapsed time of the calibration, the bio-information, and the blood pressure information, determine, based on the reliability of the calibration, whether an event associated with the calibration occurs, and display a user interface (UI) to request another calibration, through the display, when the event is determined to have occurred.

Abstract: Apparatus and methods are described, including apparatus that includes an antenna (34), configured to, by drawing energy from a magnetic field, provide a main supply voltage. The apparatus further includes operational circuitry (46, 22) configured to operate only if a derived supply voltage, derived from the main supply voltage and supplied to the operational circuitry, is greater than a threshold value, and modulating circuitry (36, 40, 42), configured to modulate a load of the antenna by alternatingly (i) connecting current-drawing circuitry to the main supply voltage, thus causing the main supply voltage to drop below the threshold value, and (ii) disconnecting the current-drawing circuitry from the main supply voltage without disconnecting the operational circuitry from the main supply voltage. Other embodiments are also described.

Abstract: In a photoacoustic measurement apparatus and a photoacoustic measurement system, it is possible to generate blood flow information using a photoacoustic image without requiring a separate tourniquet. A light source emits measurement light. A probe detects a photoacoustic wave generated in a subject after measurement light is emitted to the subject in each of the avascularized condition in which the subject is avascularized and the non-avascularized condition in which the subject is not avascularized. Photoacoustic image generation unit generates a photoacoustic image based on the detection signal of the photoacoustic wave. Blood flow information generation unit generates blood flow information based on the signal value of a photoacoustic image in a region of interest set in the photoacoustic image. The avascularization of the subject is performed by pressing the probe against the subject.

Abstract: A buckle includes a main body connectable to a tongue attached to a seatbelt of a vehicle, a sensor disposed in the main body or in a support member that supports the main body, the sensor configured to produce a sensor output signal whose waveform changes in response to movement of an object situated in a seat of the vehicle, a detection unit configured to detect, from the sensor output signal produced by the sensor, vital-sign signal components indicative of a vital sign that is at least either respiration or pulse beat, a generation unit configured to evaluate reliability of the vital-sign signal components detected by the detection unit and to generate vital-sign information about the vital sign from a reliable one of the vital-sign signal components, and an output unit configured to output the vital-sign information generated by the generation unit.

Abstract: A measurement device and method for measuring psychology stress index and blood pressure is disclosed. When the measurement device is in the psychology stress measurement mode and a pressurizing motor unit is pressurizing an airbag unit with a variable speed, the micro-processor unit may control the pressurizing motor unit to stop pressurizing the airbag unit after the pressure signal is determined as a pulse signal, and the micro-processor unit may measure the pulse signal to determine the psychology stress index. The psychology stress index is a ratio of SDNN and RMSSD according to interval data of the pulse signal within a period of time.

Abstract: Embodiments relate to devices, systems and methods of assisting blood flow return to the heart from a limb. The device comprising a wearable garment and a compression apparatus embedded in the garment for applying an external compression to a limb of a user and at least one of a processor or a controller configured to control the compression apparatus to apply the external compression, according to a compression sequence, to a muscle of the limb of the user based on real-time measurements regarding a cardiac cycle having a diastolic phase and systolic phase of the user and real-time measurements of muscle activity. The compression sequence is synchronized to commence when both a local blood flow at the limb is in the diastolic phase and the muscle is in a non-contracted state.

Abstract: A handheld device measures all vital signs and some hemodynamic parameters from the human body and transmits measured information wirelessly to a web-based system, where the information can be analyzed by a clinician to help diagnose a patient. The system utilizes our discovery that bio-impedance signals used to determine vital signs and hemodynamic parameters can be measured over a conduction pathway extending from the patient's wrist to a location on their thoracic cavity, e.g. their chest or navel. The device's form factor can include re-usable electrode materials to reduce costs. Measurements made by the handheld device, which use the belly button as a ‘fiducial’ marker, facilitate consistent, daily measurements, thereby reducing positioning errors that reduce accuracy of standard impedance measurements. In this and other ways, the handheld device provides an effective tool for characterizing patients with chronic diseases, such as heart failure, renal disease, and hypertension.

Abstract: Various embodiments relate to apparatuses and methods of using light transmission thought compressed living tissue to detect force. Transmission of light through living tissue such as a finger is affected by how much the tissue is compressed, for example by the finger being pressing on a surface. Light is introduced into the tissue, passes through the tissue, and a sensor receives the light exiting the tissue. The compression of the tissue can be determined using various characteristics of the received light, such as the light intensity, as determined based at least partly on sensor readings.

Abstract: An automatic blood pressure measuring apparatus includes: a compression band wrapped around a compressed site of a living body, the automatic blood pressure measuring apparatus sequentially extracting a pulse wave that is pressure oscillation in the compression band in a process of changing a compression pressure value of the compression band to determine a blood pressure value of the living body based on a change in the pulse wave, the compression band having a plurality of expansion bags having independent air chambers aligned in a width direction to respectively compress the compressed site of the living body, the automatic blood pressure measuring apparatus sequentially calculating an amplitude ratio of an amplitude value of a pulse wave from a predetermined expansion bag positioned on a downstream side of an upstream expansion bag positioned on an upstream side of an artery in the compressed site out of the expansion bags.

Abstract: A pulse data detecting apparatus, pulse data detecting method, and pulse data detection program are provided capable of suppressing an influence of the condition of the body surface to be measured and obtaining an appropriate measurement result under a wide range of conditions. In the present invention, a blood-flow-suppressing-projection protrusion-control mechanism section causes a blood-flow-suppressing projection to protrude to press or compress the body surface to suppress a blood flow on a downstream side, thereby increasing a blood pressure of a measurement region at the time of measurement. A light-receiving element receives reflected light of light applied from a light-emitting element to a skin surface, and outputs an electrical signal. Increasing the blood pressure of the measurement region enables to obtain an output signal at a sufficient output level from the light-receiving element. A CPU calculates a pulse rate based on the output signal from the light-receiving element.

Abstract: A method for determining a calibrated aortic pressure waveform from a brachial cuff waveform involves the use of one or more generalized transfer functions. The one or more generalized transfer functions are specific for predetermined brachial cuff pressure ranges, such as below diastolic pressure, between diastolic and systolic pressure, and above systolic pressure. The brachial cuff is inflated to a pressure within the pressure range appropriate for the generalized transfer function to be applied to the brachial cuff waveform to generate the aortic pressure waveform. In some circumstances, it may be necessary to use a calibration transfer function to generate a calibrated aortic waveform. In other circumstances, the calibration transfer function is not necessary.

Abstract: An active medical device is configured to receive inputs and to calculate a hemodynamic parameter representative of myocardium contractility determined from an endocardial acceleration signal. The microcontroller acquires heart rate and hemodynamic parameter pairs of values during a plurality of cardiac cycles. The microcontroller is configured to distribute the pairs of values into discrete bins to develop a profile for analysis. The microcontroller is configured to conduct an analysis comprising calculating an index representative of the patient's clinical status. The hemodynamic parameter representative of the myocardial contractility is a time interval separating the first and the second peak of endocardial acceleration.

Abstract: Hardware and software methodology are described for a non-invasive approach to blood pressure measurement in pulmonary artery and systemic arteries by using wall displacement and blood velocity that are measured using ultrasound, microwave techniques and/or other radiofrequency (RF) techniques.

Abstract: A method for detecting cuff slippage in a blood pressure monitoring device includes starting a cuff inflation on the blood pressure monitoring device. A plurality of pressure samples is obtained when the cuff is inflating. A level of background noise is determined during the cuff inflation. The level of background noise is determined from the plurality of pressure samples. When the background noise is determined, a determination is made from the plurality of blood pressure readings whether a pressure pattern indicating cuff slippage is obtained.

Abstract: A blood pressure cuff includes a first bladder having a width, and a length transverse to the width. The blood pressure cuff also includes a second bladder connected to the first bladder and a port fluidly connected to at least one of the first and second bladders.

Abstract: Systems and methods are provided for storing event markers. The value of a monitored physiological metric may be monitored and compared to a reference value. A patient monitoring system may compute a difference between a monitored metric and a reference value, and compare the difference to a threshold value to determine whether a physiological event has occurred. Based on the determination, a patient monitoring system may store an event marker, trigger a response, update a metric value, or perform any other suitable function.

Abstract: A manufacturing system for assembling wireless electronic devices is provided. The manufacturing system may include test stations for testing the radio-frequency performance of components that are to be assembled within the electronic devices. A reference test station may be calibrated using calibration coupons having known radio-frequency characteristics. The calibration coupons may include transmission line structures. The reference test station may measure verification standards to establish baseline measurement data. The verification standards may include circuitry having electrical components with given impedance values. Many verification coupons may be measured to enable testing for a wide range of impedance values. Test stations in the manufacturing system may subsequently measure the verification standards to generate test measurement data.

Abstract: Preferably, an embodiment of a vein presentation enhancement device includes at least, an interior cover supporting a first fastening member, and an exterior cover communicating with the interior cover, wherein the exterior cover provides a first securement member that interacts with the first fastening member to secure the preferred device positioned about a limb of a subject. The preferred embodiment further includes a bladder formed between the interior and exterior covers, and an air transfer assembly connected to said bladder for transfer of air into and out of said bladder, wherein said interior and exterior covers collectively provide a plurality of projections defining a blood access window.

Abstract: The invention relates to a method and a device for noninvasive blood pressure measurement by means of two pressure cuffs (10, 20) each having one sensor (6, 8), the output signal of which is a function of the blood pressure to be measured and of the cuff pressure, characterized in that, first in a reference phase, the cuff pressure of at least one pressure cuff is varied and the maximum output signals of the sensor occurring at the systolic blood pressure are detected at the different cuff pressures, the dependence of the maximum output signal from the sensor (6, 8), occurring at the systolic blood pressure, on the transmural pressure is determined, and the curve of the reference phase quotient is determined as a function of transmural pressure and saved, then, in a measurement phase during a pulse beat, two signal values are determined at two different cuff pressures by means of a control unit, and a measurement phase quotient is formed from these two signal values, and, by comparing the measurement phase qu

Abstract: An automatic blood pressure measuring apparatus includes: a compression band wrapped around a compressed site of a living body, the automatic blood pressure measuring apparatus sequentially extracting a pulse wave that is pressure oscillation in the compression band in a process of changing a compression pressure value of the compression band to determine a blood pressure value of the living body based on a change in the pulse wave, the compression band having a plurality of expansion bags having independent air chambers aligned in a width direction to respectively compress the compressed site of the living body, the automatic blood pressure measuring apparatus sequentially calculating an amplitude ratio of an amplitude value of a pulse wave from a predetermined expansion bag positioned on a downstream side of an upstream expansion bag positioned on an upstream side of an artery in the compressed site out of the expansion bags.

Abstract: A measurement device includes a blood pressure measurement unit that measures blood pressures in the upper and lower limbs, a pulse wave measurement unit that measures pulse waves in the upper and lower limbs, a first index calculation unit that calculates an ABI by calculating the ratio of the blood pressures in the upper and lower limbs, a second index calculation unit that calculates a second index used for evaluation of the ABI using the pulse waves in the upper and lower limbs, an evaluation unit that evaluates the reliability of the ABI using the ABI and the second index, and an output unit that outputs the ABI along with the result of evaluation.

Abstract: A sensor system for continuous non-invasive arterial blood pressure (CNAP) is provided. The CNAP-sensor comprises of a base portion and a detachable and disposable portion. The base portion is connected to a control system. The disposable portion is for attachment to a human body part. The CNAP-sensor system includes a photo-plethysmographic (PPG) system having at least one light source, at least one light detector, electrical supplies, light coupling systems, one or more connectors, and a cuff including air supplies.

Abstract: A system for performing remote ischemic conditioning includes an inflatable cuff configured to encircle a limb of a subject and a controller removably attached to the cuff. The controller includes a pump; a manifold in fluid communication with the pump; a connector in fluid communication with the manifold and in removable fluid communication with the inflatable cuff; a pressure sensor; and a control circuit configured to implement a remote ischemic conditioning treatment protocol.

Abstract: A medical blood pressure transducer that provides an identifier to a monitor that conveys characteristics of the transducer. The monitor can use the information to decide whether to function, or in calibration of the system. The transducer may be part of a disposable blood pressure monitoring system, and may include two transducers closely-spaced to provide two separate but identical outputs. In this way, the transducer may be connected to both a patient monitor and a cardiac output monitor at the same time measurements from a single line can be simultaneously supplied to two separate monitoring devices (for example a patient monitor and a cardiac output monitor). The identifier for the transducer may be circuitry, specifically a resistance/capacitance (RC) combination that possesses a characteristic time constant.

Abstract: Provided are a blood pressure measuring apparatus capable of effectively eliminating the influence which the volume change in an upstream portion of an occluding cuff has on a pulse wave detection cuff in an oscillometric double-cuff system, increasing the S/N ratio of systolic blood pressure detection, and accurately measuring the blood pressure with an inexpensive arrangement, a cuff, and a blood pressure measuring method. The apparatus includes a first pipe (106) connected to an occluding air bag (108) and sub air bag (109). The first pipe is connected to the sub air bag, and the sub air bag is connected to the occluding air bag via an entirely foldable rod shape member (111) capable of maintaining a hollow portion. The sub air bag is laid over the occluding air bag by folding a middle pipe.

Abstract: A sphygmomanometer measures blood pressure in accordance with an oscillation in an artery wall, resulting from an arterial pulse correspondent with a change in cuff pressure. It comprises a cuff that is connected to the sphygmomanometer main body by a tube, a display unit for displaying the results of blood pressure measurements, and an air supply unit for supplying air to, and thus pressurizing, the cuff, which is detachable from the sphygmomanometer main body. The air supply unit is screwed into the sphygmomanometer main body with a screw assembly, and the screwed-in state is preserved by a caulking ring. The air supply unit also comprises a filter for keeping dust from entering the sphygmomanometer main body.

Abstract: Method to obtain continuous recording of the central arterial blood pressure waveform noninvasively utilizes dual (distal occlusion and proximal) brachial artery occlusion cuffs and dual external osculation. The distal arterial occlusion cuff eliminates venous stasis artifact and flow related gradient from aorta to the brachial artery. The proximal cuff measures, and delivers, dual external oscillation. The dual external oscillation allows measurement of the arterial compliance at a multitude of transmural pressure values during each cardiac cycle. Transmural pressure/arterial compliance and arterial pressure curves are subsequently reconstructed using dual external oscillation. The curves consist of two parts, rapid and slow parts, both at the frequency higher than the arterial pulse.

Abstract: A living body information measuring apparatus can suppress the bulge of tendons due to the bending of a wrist or fingers, and has good contact intimacy with arteries, making it possible to make accurate measurements of living body information. A cuff is formed of: a compression fluid bag which is provided for detecting a pulse wave signal, and which can be expanded and contracted by being supplied with a fluid; and two auxiliary fluid bags which are provided on an outer side of the compression fluid bag, and which can be expanded and contracted by being supplied with the fluid. The auxiliary fluid bags have a two-layer structure, and are connected to the compression fluid bag via opening portions, while the auxiliary fluid bags are respectively divided from each other. The compression fluid bag compresses the tendons, the radial artery and the ulnar artery, while the auxiliary fluid bag and the auxiliary fluid bag compress the radial artery and the ulnar artery, respectively.

Abstract: An electronic sphygmomanometer acquires a patient ID and recommended site information read from an ID card before measurement. The recommended site indicating the site to be attached to a cuff of a left site or a right site is thereby specified for every person to be measured (patient ID). Thereafter, the site to be attached to the cuff is guided by notifying the specified recommended site to the person to be measured.

Abstract: A flexible measuring element for use with plural blood pressure measuring cuffs is provided. The flexible measuring element includes a flexible body, an identification block distribution region, and an indicating part. The identification block distribution region is disposed on the flexible body. The identification block distribution region includes at least two different identification blocks matching corresponding identification signs of the plural blood pressure measuring cuffs. When the flexible body is wrapped around an animal limb by a user, the indicating part lies within a specified identification block of the at least two identification blocks for prompting the user to select a specified blood pressure measuring cuff corresponding to the specified identification block.

Abstract: A vascular testing system includes a first pressure cuff assembly positionable about a limb of a patient and a controller. The first pressure cuff assembly includes a pressure bladder and a first array of acoustic sensors, the first array including a plurality of acoustic sensor elements arranged circumferentially relative to the pressure bladder. The controller is configured to concurrently sense vascular data at two or more discrete testing locations utilizing at least two different sets of the acoustic sensors of the first array each positioned at or near one of the discrete testing locations. Each set of the acoustic sensors includes one or more of the plurality of acoustic sensor elements.

Abstract: Disclosed is an apparatus for measuring blood pressures of both arms, in which an examine simultaneously measures the blood pressures of both arms without getting the arms out of cuffs in the stable and safely posture. The apparatus includes a body (100) mounted on a mounting table such as a desk, a left cuff unit (110) placed at a left upper portion of the body (100), and a right cuff unit (210) placed at a right upper portion of the body (100). The left and right cuff units have the symmetric structure so that the blood pressure is measured at identical blood pressure measurement portions of the left and right arms of the examinee which are placed at internal space parts of the left and right cuff units.

Abstract: A blood pressure measuring device disclosed in the present invention comprises a base, a reel-type cuff and at least one stopper. The reel-type cuff is elastically and recoverably reeled in the base with one end, and is freely extended out from the base with the other end. The stopper, after being operated, can limit at least one determined length that the reel-type cuff is extended out from the base.

Abstract: An ABPI measurement system includes a cuff for each ankle and a cuff for each arm of a patient. Each cuff has first and second chambers. The four cuffs are applied to each limb (or finger or toe), each chamber is inflated simultaneously to a pressure until a Pneumo Arterial Plethysmography (PAPG) signal related to the arterial flow in the limb is detected at the chambers. The second chambers are then simultaneously inflated until the PAPG signals are extinguished in each limb, the inflation of the second chambers continuing for 10 mmHg to 20 mmHg above the extinguishing pressure. The second chambers are then deflated and the pressure in the second chamber at which the PAPG signal returns in the first chamber is recorded for each limb and this value of the pressure is used to calculate the ABPI. The ABPI is displayed or sent to a remote site.

Abstract: A system for monitoring a patient includes an inflatable cuff configured to at least partially occlude an artery of the patient, and a sensor configured to determine a first parameter associated with the at least partially occluded artery and to generate an output signal indicative of the first parameter. The system also includes a processor configured to receive the output signal and information indicative of an occlusion efficiency of the cuff. The processor is configured to determine a hemodynamic parameter of the patient based on the output signal and the information.

Abstract: A CPU of a blood pressure information measurement device calculates blood pressure from a change in internal pressure of an air bladder used to measure the blood pressure. AI (augmentation index) and Tr (traveling time to reflected wave) are calculated from a pulse wave waveform. A path difference calculation unit of the CPU stores a correction equation to correct a pulse wave propagation distance that is stored in advance, and, by substituting the calculated blood pressure value, AI and the like into the correction equation, corrects the pulse wave propagation distance stored in advance and approximates the pulse wave propagation distance stored in advance to an actual pulse wave propagation distance. A PWV (pulse wave velocity) calculation unit calculates the PWV using the corrected distance.

Abstract: An apparatus for evaluating a vascular endothelial function, includes: a cuff pressure controlling unit configured to perform continuous pressure stimulation on a part of a body of a subject for a predetermined time, by using a cuff adapted to be wrapped around the part of the body of the subject; a cuff pressure detecting unit configured to detect a cuff pressure from an output of a pressure sensor connected to the cuff; a pulse wave detecting unit configured to detect a pulse wave from the output of the pressure sensor; and an analyzing unit configured to evaluate the vascular endothelial function by comparing vessel viscoelastic indexes which are obtained from the pulse wave detected in two of zones before, during, and after the pressure stimulation, and which exclude an amplitude of the pulse wave.

Abstract: The objective of the present invention is to provide a sphygmomanometer that is easy to use. The sphygmomanometer according to the present invention measures blood pressure in accordance with an oscillation in an artery wall, resulting from an arterial pulse correspondent with a change in cuff pressure. It comprises a cuff that is connected to the sphygmomanometer main body by a tube, a display unit for displaying the results of blood pressure measurements, and an air supply unit for supplying air to, and thus pressurizing, the cuff, which is detachable from the sphygmomanometer main body. The air supply unit is screwed into the sphygmomanometer main body with a screw assembly, and the screwed-in state is preserved by a caulking ring. The air supply unit also comprises a filter for keeping dust from entering the sphygmomanometer main body.

Abstract: An ABPI measurement system includes two cuffs for each ankle and two cuffs for each arm of a patient. Each cuff has chambers. The four cuffs are applied to each limb (or finger or toe), each chamber is inflated simultaneously to a pressure until a Pneumo Arterial Plethysmography (PAPG) signal related to the arterial flow in the limb is detected at the chambers. The chambers are then simultaneously inflated until the PAPG signals are extinguished in each limb, the inflation of chambers continuing for 10 mmHg to 20 mmHg above that pressure. The chambers are then deflated and the pressure at which the PAPG signal returns in the first chamber is recorded for each limb and this value of the pressure is used to calculate the ABPI. The ABPI is displayed or sent to a remote site.

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: A blood pressure measuring apparatus includes a cuff member (2) which can be attached to and detached from a blood pressure measurement portion, and a cuff main body (1) including a compression air bladder (8) for pressing the blood pressure measurement portion, a sub air bladder (7), and a pulse wave detection air bladder (5). After pressurization is performed by compression air bladder pressurizing/depressurizing means (22, 23) and sub air bladder pressurizing/depressurizing means (27, 26), depressurization is controlled at the same depressurization rate, thereby reducing the cuff-edge effect and obtaining a pulse wave signal.

Abstract: A measurement device pressurizes two cuffs in a state in which the cuffs are attached to the distal side and the proximal side of the measurement device, respectively, calculates an AI value or the like based on a pulse wave detected from a change in cuff pressure on the distal side while pressurizing the two cuffs, and determines that avascularization on the distal side has been completed if the AI value or the like has converged. Once it is determined that avascularization has been completed, the cuff pressure on the distal side is fixed, and a pulse wave is detected from a change in cuff pressure on the proximal side in a state in which the distal side is avascularized.

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: Disclose herein is a method of measuring pressures in a coronary sinus. In one embodiment, the method includes: introducing a distal portion of a lead or tool into the coronary sinus, wherein the distal portion includes first and second pressure sensors and at least one selectably expandable member; expanding the at least one expandable member such that the first and second sensors are isolated from each other within the coronary sinus; and taking pressure measurements with the first and second sensors when isolated from each other.

Abstract: A blood pressure measuring apparatus controls a winding mechanism in parallel with increase or decrease of a pressure of a measuring fluid bladder after the measuring fluid bladder is wound around a measurement region. Therefore, a change in a winding state of the measuring fluid bladder is prevented. Additionally, measurement accuracy is improved by keeping compliance of the measuring fluid bladder constant.