Abstract: The present invention includes a diaphragm disposed to receive, on one surface, a pressure of a first air in an air pipe as a part of a pipe wall of the air pipe coupled to a cuff in a fluid flowable manner. The diaphragm blocks the pressure of the first air in the air pipe in a pressurization process or a depressurization process of the cuff, meanwhile transmits, through this diaphragm, a sound in a frequency band of a Korotkoff sound among sounds traveled through the first air in the air pipe from a measurement target site. A chamber disposed including the diaphragm as a part of a peripheral wall on a side of an other surface of the diaphragm is included. A sound detection device provided to face a second air in the chamber is included.

Abstract: A blood-pressure-related information display device determines whether a measured value is classified into any of a first range preset in a specification, a second range preset adjacent to a side lower than the first range, and a third range preset adjacent to a side lower than the second range. On a display screen, the measured value is displayed when the measured value is classified into the first range, deviation information indicating that the measured value is classified into the second range or the measured value in addition to the deviation information is displayed when the measured value is classified into the second range, and an indication of measurement error is displayed when the measured value is classified into the third range.

Abstract: An electronic sphygmomanometer includes a cuff pressure control unit, a pressure detection unit, and a blood pressure measurement unit that extracts a pulse wave signal and measures blood pressure based on the pulse wave signal. A pulse wave interval calculation unit obtains a data group representing pulse wave intervals based on the pulse wave signal obtained only in one depressurization process for a subject for each one measurement occasion. A determination unit aggregates data groups for three or more measurement occasions to obtain an average value of the pulse wave intervals, and determines whether or not there is a possibility that atrial fibrillation occurred based on whether or not there is data of an irregular pulse wave exceeding an allowable range with respect to the average value.

Abstract: 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.

Abstract: 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.