A blood pressure monitor configured to removably mount to a cuff in a substantially symmetrical position with respect to a width of the cuff can include a housing defining an interior, a first port, and a second port. The first port can: secure to a first prong of the cuff when the cuff is mounted in a first orientation; receive and secure to a second prong of the cuff when the cuff is mounted in a second orientation; and enable fluid communication between the interior and at least one of a first fluid passage within the first prong and a second fluid passage within the second prong. The second port can: secure to the second prong of the cuff when the cuff is mounted in the first orientation; and receive and secure to the first prong of the cuff when the cuff is mounted in the second orientation.

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.

A blood pressure measuring cuff of the present invention includes: an outer cloth that extends in a longitudinal direction in a band shape and surrounds a site to be measured; a pressing fluid bag that is provided to extend along the longitudinal direction on a side of the outer cloth facing the site to be measured and compresses the site to be measured; a sound acquisition fluid bag that is provided between the outer cloth and the pressing fluid bag in a thickness direction perpendicular to the outer cloth and acquires a sound from the site to be measured via the pressing fluid bag; a first fluid pipe connected to the pressing fluid bag so as to be capable of flowing a fluid; and a second fluid pipe connected to the sound acquisition fluid bag so as to be capable of flowing a fluid, separately from the first fluid pipe.

A sphygmomanometer according to the present invention includes a blood pressure measuring cuff worn around a site to be measured, a pressure device that pressurizes or depressurizes the cuff, and a sound detection device that detects a sound generated by the site to be measured via the cuff. An amplification factor setting unit measures a first passage time required for the pressure of the cuff to pass through a first pressure range in a pressurization process of the cuff, and variably sets an amplification factor for a Korotkoff sound component according to the first passage time. A blood pressure calculation unit receives an output of the sound detection device according to the sound from the cuff, amplifies the Korotkoff sound component included in the output at a set amplification factor, and calculates a blood pressure of the site to be measured.

A cardiovascular detection system and method, comprising an active compression cuff contracting at a frequency higher than the systolic frequency of the heart. Meanwhile, the detection device is used to capture the influence of the active compression cuff and cardiac systole on the blood of the part to be detected. In addition, it is supplemented by electrocardiography to monitor the reference value of cardiac systole to distinguish the difference between the pulse wave generated by the active compression cuff and the pulse wave generated by the heart. In this way, the state of the cardiovascular system can be quickly understood. Since the active compression cuff is contracted at a frequency higher than the systolic frequency of the heart, it can be more accurately determined whether the blood vessel is blocked or hardened.

The invention comprises a method for estimating state of a cardiovascular system, comprising the steps of: providing a cardiac analyzer, comprising: a blood pressure sensor, the blood pressure sensor generating a time-varying pressure state waveform output from a portion of a person; a system processor connected to the blood pressure sensor; and a dynamic state-space model of a cardiovascular system, the system processor receiving cardiovascular input data, from the blood pressure sensor, related to a transient pressure state of the cardiovascular system, where at least one probabilistic model, of the dynamic state-space model, operating on the time-varying pressure state waveform output generates a probability distribution function to a non-pressure state of the cardiovascular system. The probability distribution function is iteratively updated using synchronized updated time-varying pressure state waveform output from the blood pressure sensor and a non-pressure state output related to a cardiovascular system parameter is generated.

A sphygmomanometer of the present invention includes a bag-shaped sensing cuff to be worn to wrap a measurement site, a back plate disposed on the sensing cuff along a surface opposite to the measurement site, a pressing member for pressing the back plate toward the measurement site, and a blood-pressure calculating part calculating a blood pressure based on a pressure of a fluid stored in the sensing cuff. Regarding a longitudinal direction perpendicular to a circumferential direction of the measurement site to be wrapped by the sensing cuff, a dimension of the back plate in a width direction along the longitudinal direction is larger than a dimension of the sensing cuff in the width direction.

A sphygmomanometer includes: a sensing cuff that includes a second sheet disposed to face the pressing member's inner circumferential surface and a first sheet facing the second sheet; a fluid storage control part providing a control of supplying and storing the pressure-transmitting fluid into sensing cuff in a worn state wherein the pressing member and sensing cuff are worn on the wrist; and a blood-pressure calculating part calculating a blood pressure based on a pressure of the pressure-transmitting fluid stored in the sensing cuff. The fluid storage control part supplies fluid in the worn state such that the first and second sheets are in contact with each other in a region corresponding to an ulna, a region corresponding to a radius, and a region corresponding to a tendon while first and second sheets are separated from each other in regions corresponding to two arteries that are radial and ulnar arteries.

A blood pressure measurement device measures a blood pressure of a subject by a blood pressure measurement unit, detects a body sound of the subject during blood pressure measurement by a sound detection unit. The measured blood pressure and the detected body sound are recorded in association with each other by time information. The factor for the increase of measured blood pressure value can be specified by showing the chronological blood pressure measurement result along with checking the presence or absence of a body sound such as snoring etc.

A blood pressure measuring device includes a device main body; a curler configured to bend along a circumferential direction of a wrist of a living body, and configured to come into contact with a portion of the wrist at least between a dorsal side and a palmar side; a strap on the device main body, configured to cover an outer surface of the curler; a sensing cuff arranged in a region of the wrist where arteries exist; a rubber plate on a side of the sensing cuff nearer to the curler and configured to elastically deform; a pressing cuff between the curler and the rubber plate and configured to press the sensing cuff; and a cuff on a side of the curler nearer to the living body and arranged on the dorsal side of the wrist.