Colin Electronics Co., Ltd.

Nippon Colin Co., Ltd.

Hifumi Yokoe

Minoru Niwa

Hideichi Tsuda

Chikao Harada

Norio Kawamura

Masahiro Uemura

Tokuji Hayakawa

Noriyuki Kaida

Masanobu Yasui

Blood pressure monitoring system

An apparatus for automatically measuring a blood pressure of a subject, including a pressing device for pressing a body portion of the subject, such as an upper arm; a first blood pressure measuring device for detecting pulse sounds which are produced from the body portion as the pressing force of the pressing device is varied, and determining a first blood pressure (BP) value of the subject based on at least one of an appearance and a disappearance of the pulse sounds; a second blood pressure measuring device for detecting an oscillatory pressure wave which is produced from the body portion in synchronization with heartbeat of the subject as the pressing force of the pressing device is varied, and determining a second BP value of the subject based on variation in magnitude of the oscillatory pressure wave; and a judging device for judging at least one of the first and second blood pressures to be abnormal if a degree of inequality between the first and second blood pressures exceeds a reference value.

Automatic blood-pressure measuring apparatus

A method and an apparatus for measuring blood pressure of a subject by using a pulse wave sensor for detecting pulse wave produced from an arterial vessel of the subject, and pressing device for pressing the pulse wave sensor against the arterial vessel via a body surface of the subject, the method comprising the steps of pressing the pulse wave sensor against the arterial vessel with a continuously variable pressing force produced by the pressing device, detecting variation in magnitude of the pulse wave with the pulse wave sensor while the pressing force of the pressing device is continuously varied, and determining blood pressure of the subject based on the detected magnitude variation of the pulse wave.

Method and apparatus measuring blood pressure

A blood pressure measuring apparatus having a housing detachably set on a body surface of a subject, a pressure sensor accommodated in the housing such that the pressure sensor is opposed to the body surface when the housing is set on the body surface, the pressure sensor being pressed against the body surface so as to detect pulse wave produced from an arterial vessel of the subject, the pressure sensor generating pulse wave signal representing the detected pulse wave, a pressing device for pressing the pressure sensor against the body surface, and a control device for determining blood pressure in the arterial vessel based on the pulse wave signal supplied from the pressure sensor, the pressing means and the control means being accommodated in the housing.

Blood pressure measuring apparatus

A method and apparatus for measuring blood pressure of a subject based on Korotkoff sounds which are produced synchronously with heartbeat of the subject by pressing a body portion of the subject. The method including the steps of detecting the Korotkoff sounds by a microphone, the microphone generating electric signal corresponding to the detected Korotkoff sounds in a whole frequency range thereof; separating from the electric signal a signal component corresponding to the Korotkoff sounds in a comparatively high frequency range out of the whole frequency range; measuring, regarding the signal component, time of occurrence of at least one Korotkoff sound in the comparatively high frequency range; determining at least one time window regarding the electric signal, based on the time of occurrence measured regarding the signal component, the at least one time window consisting of a time interval smaller than a time period of occurrence of the Korotkoff sounds; and collecting a Korotkoff sound occurring in the time interval of each of the at least one time window determined regarding the electric signal, the collected Korotkoff sound being utilized for determining the blood pressure of the subject.

Method and apparatus for measuring blood pressure

A pulse wave detecting apparatus having a pulse wave sensor for detecting pulse wave produced from an arterial vessel of a subject, the pulse wave sensor being movable along a cross line crossing the arterial vessel so as to be positioned in place relative to the arterial vessel, and pressed against a body surface of the subject so as to detect the pulse wave produced from the arterial vessel, a frame member for being set on the body surface of the subject, a guide device supported by the frame member, for guiding the pulse wave sensor within a predetermined length along the cross line, a feeding screw supported by the frame member such that the feeding screw is rotatable about a longitudinal axis thereof parallel to the cross line, the feeding screw being threadedly engaged with the pulse wave sensor, a drive motor supported by the frame member such that the drive motor is located adjacent to the body surface when the frame member is set on the body surface of the subject, and a transmission device provided between the drive motor and the feeding screw, for transmitting rotating force of the drive motor to the feeding screw, so as to move the pulse wave sensor along the cross line.

Pulse wave detecting apparatus

An automatic blood pressure monitoring system includes a device which detects the degree of saturation of oxygen in the blood at a peripheral part of the body. The detecting device generates a signal if the degree of saturation is detected to be abnormal. A control device operates a blood pressure measuring device in response to the signal indicating abnormal oxygen saturation. In a second embodiment, a trigger device periodically generates a signal to operate the blood pressure measuring device. When an abnormal oxygen saturation is detected, a signal operates the blood pressure measuring device and the triggering interval is shortened.

Automatic blood pressure monitoring system

An apparatus for detecting and displaying a pulse wave based on pulsations of an arterial vessel of a human body, with an improved accuracy irrespective of variations in pressing force of a sensing unit against a body member and/or irrespective of deviation of the depressed sensing unit from the arterial vessel to be detected, thereby providing the user of the apparatus with reliable medical diagnostic information on blood circulating organs.

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Kosai, Japan

Hifumi Yokoe