Colin Corporation

Colin Medical Technology Corporation

Colin Medical Technology Co Corporation

Akira Tampo

Kiyoyuki Narimatsu

Toshihiko Ogura

Takashi Honda

Hiroshi Masuda

A pulse wave analyzing apparatus including a cufffor detecting a pulse wave from a living subject, a pressure sensorfor converting the pulse wave detected by the cuff, into an electric signal, i.e., a pulse wave signal SM, a plurality of band-pass filters(BPF(), BPF(), . . . , BPF(n)) that have respective low-side cuff-off frequency bands differing from each other and each receive the pulse wave signal SM, a provisional rising point determining devicefor determining respective times PS of respective provisional rising points of respective pulse waves represented by respective secondary pulse wave signals SMthat have passed through the band-pass filters, and a proper rising point determining devicefor comparing the respective times PS of respective provisional rising points with each other and thereby determining a time AS of a proper rising point based on the respective times PS of respective provisional rising points.

Filter for use with pulse-wave sensor and pulse wave analyzing apparatus

A circulatory-organ evaluating apparatus for evaluating a circulatory organ of a living subject, including a display device, and a control device which controls the display device to simultaneously and graphically display a blood pressure, an augmentation index, and pulse-wave-velocity-related information of the subject.

Circulatory-organ evaluating apparatus

A blood-pressure estimating apparatus, including a pulse-wave detecting device which detects a pulse wave from a portion of a living subject, a blood-pressure measuring device which includes an inflatable cuff adapted to be worn on the portion of the subject and measures, with the cuff, a diastolic blood pressure and a systolic blood pressure of the portion of the subject, and a mean-blood-pressure estimating device which converts, based on a minimum magnitude and a maximum magnitude of the pulse wave detected by the pulse-wave detecting device and the diastolic and systolic blood pressure measured by the blood-pressure measuring device, a magnitude of a gravity center of an area defined by the pulse wave into an estimated mean blood pressure of the portion of the subject.

Blood-pressure determining apparatus

A blood-pressure measuring apparatus including a cuff which is adapted to be worn on a portion of a living subject to press the portion, a waveform analyzing device for analyzing a form of a cuff pulse wave which is obtained from the cuff, and a cuff-pulse-wave obtaining device for obtaining, before the cuff presses the portion of the subject for measuring a blood pressure of the subject, the cuff pulse wave from the cuff so that the waveform analyzing device analyzes the form of the cuff pulse wave.

Blood-pressure measuring apparatus having waveform analyzing function

An augmentation-index measuring apparatus including a cuff which is adapted to be worn on a portion of a living subject to press the portion, an augmentation-index determining device for determining an augmentation index of the subject based on a cuff pulse wave obtained from the cuff, and a preliminary pressing device for preliminarily pressing, before the cuff pulse wave is obtained, for the determination of the augmentation index, from the cuff having a pulse-wave detection pressure, the portion of the subject using the cuff having a pressure higher than the pulse-wave detection pressure.

Augmentation-index measuring apparatus

An apparatus for examining arteriosclerosis of a living subject, including a pulse-wave detecting device which detects a pulse wave from a first portion of the subject, a stenosis-related-information obtaining device for obtaining, based on a shape of the pulse wave detected by the pulse-wave detecting device, stenosis-related information that changes in relation with stenosis of an artery of a second portion of the subject that is located upstream of the first portion of the subject in a direction in which blood flows in the artery, and a stenosis judging device for making, based on the stenosis-related information obtained by the stenosis-related-information obtaining device, a judgment about the stenosis of the artery of the second portion of the subject.

Arteriosclerosis examining apparatus

An apparatus for evaluating a degree of arteriosclerosis of a living subject, the apparatus including a blood-pressure measuring device which measures a systolic and a diastolic blood pressure of the subject, a pulse-wave-propagation-velocity-related-information obtaining device which obtains pulse-wave-propagation-velocity-related information that is related to a velocity at which a pulse wave propagates through an artery of the subject, a display device, and a control device which controls the display device to display, in a two-dimensional graph defined by a first axis indicative of blood pressure and a second axis indicative of pulse-wave-propagation-velocity-related information, at least one symbol indicating two positions one of which corresponds to the systolic blood pressure measured by the blood-pressure measuring device and the pulse-wave-propagation-velocity-related information obtained by the pulse-wave-propagation-velocity-related-information obtaining device, and the other of which corresponds to the diastolic blood pressure measured by the blood-pressure measuring device and the obtained pulse-wave-propagation-velocity-related information.

Arteriosclerosis-degree evaluating apparatus

A vascular-endothelial-cell-function evaluating apparatus including a pressing device including a cuff that is adapted to be worn on a first portion of a living subject, and a cuff-pressure changing device that changes a pressure in the cuff so as to press the first portion of the subject in a pressing period, a pulse-wave detecting device that detects a pulse wave including a plurality of heartbeat-synchronous pulses, from the first portion of the subject, or a second portion of the subject located on a distal side of the first portion, and a pulse-wave-second-half-information obtaining device that obtains a plurality of sets of pulse-wave-second-half information that represent respective characteristics of respective second-half portions of respective heartbeat-synchronous pulses of the pulse wave that are detected by the pulse-wave detecting device at respective different times, the respective second-half portions of the respective heartbeat-synchronous pulses being respective portions of the respective pulses that are subsequent to respective peak points of the respective pulses, the pulse-wave-second-half-information obtaining device providing a time-wise change of the sets of pulse-wave-second-half information that is caused by the pressing of the pressing device.

Vascular endothelial cell function evaluating apparatus

An augmentation-index determining apparatus, including a cuff, a cuff-pressure changing device which changes a pressing pressure of the cuff, a pulse-wave extracting device which extracts a pulse wave from the cuff, a peak-occurrence-time determining device for determining, based on a high-cuff-pressure pulse wave which is extracted by the pulse-wave extracting device when the cuff-pressure changing device makes the pressing pressure of the cuff higher than a systolic blood pressure of a subject, a time of occurrence of a peak point of an incident-wave component of the high-cuff-pressure pulse and a time of occurrence of a peak point of a reflected-wave component of the high-cuff-pressure pulse wave, and an augmentation-index determining device for determining, based on the respective times of occurrence of the respective peak points of the incident-wave and reflected-wave components of the high-cuff-pressure pulse, respective times of occurrence of respective peak points of incident-wave and reflected-wave components of a low-cuff-pressure pulse which is extracted by the pulse-wave extracting device when the cuff-pressure changing device makes the pressing pressure of the cuff lower than a mean blood pressure of the subject, and determining an augmentation index based on respective magnitudes of the low-cuff-pressure pulse wave at the respective times of occurrence of the respective peak points of the incident-wave and reflected-wave components of the low-cuff-pressure pulse.

Augmentation-index determining apparatus and arteriosclerosis inspecting apparatus

An apparatus for inspecting arteriosclerosis of a living subject, including a pulse-wave detecting device which detects a pulse wave from a portion of the subject, an augmentation-index determining device for determining, based on the pulse wave detected by the pulse-wave detecting device, an augmentation index indicating a proportion of a reflected-wave component of the pulse wave to an incident-wave component thereof, so that the arteriosclerosis of the subject is inspected based on the augmentation index determined by the augmentation-index determining device, a waveform-related-information obtaining device which obtains waveform-related information that is related to a change of a waveform of the pulse wave detected by the pulse-wave detecting device, a display device, an augmentation-index displaying device for operating the display device to display the augmentation index determined by the augmentation-index determining device, and a waveform-related-information displaying device for operating the display device to display, in addition to the augmentation index, the waveform-related information obtained by the waveform-related-information obtaining device.

Arteriosclerosis inspecting apparatus

An apparatus for evaluating a function of an autonomic nerve of a living subject, including a heart-rate measuring device which iteratively measures a heart rate of the subject, a cuff-pressure changing device which changes a pressure in a first cuff adapted to be wound around an inferior limb of the subject, and a pressure in a second cuff adapted to be wound around a superior limb of the subject, so as to press the inferior and superior limbs, and a dispersion-degree determining device for determining a first degree of dispersion of the heart-rate values iteratively measured by the heart-rate measuring device after the cuff-pressure changing device starts pressing the inferior and superior limbs.

Autonomic-nerve-function evaluating apparatus

An augmentation-index measuring apparatus including a cuff which is adapted to be worn on a portion of a living subject to press the portion, a fourth-order-differentiating device for subjecting a cuff pulse wave obtained from the cuff, to a fourth-order differentiation, and thereby obtaining a fourth-order-differentiated waveform, a peak-point determining device for determining, based on the fourth-order-differentiated waveform obtained by the fourth-order-differentiating device, a peak point of an incident-wave component contained in the cuff pulse wave and a peak point of a reflected-wave component contained in the cuff pulse wave, and an augmentation-index determining device for determining an augmentation index of the subject that indicates a proportion of one of a first magnitude of the cuff pulse wave at a time of occurrence of the peak point of the incident-wave component and a second magnitude of the cuff pulse wave at a time of occurrence of the peak point of the reflected-wave component, to the other of the first and second magnitudes.

Growing community of inventors

Komaki, Japan

Akira Tampo