Abstract: A region of interest which is considered to be a vascular wall of an artery is set in a B-mode image, and tracking processing is performed for each region of interest. A maximum displacement velocity Vu in a positive direction and a maximum displacement velocity Vd in a negative direction are obtained as a peak value of a displacement velocity of the vascular wall. If a first peak ratio (Vu/Vd) of a region of interest corresponding to an anterior wall is equal to or greater than a predetermined first feature threshold value (for example, 2.0) using the obtained maximum displacement velocity Vu in the positive direction and maximum displacement velocity Vd in the negative direction, it is determined that the region of interest is an artery.

Abstract: A blood pressure measurement apparatus includes a sensor, an input section, and a circuit. The sensor is configured to measure blood flow speed in a target blood vessel. The input section is configured to input blood pressure from a measurement apparatus continuously measuring the blood pressure. The circuit is configured to estimate the blood pressure on the basis of the blood flow speed by referencing a correlation formula that indicates correlation characteristics of the blood pressure from the measurement apparatus and the blood flow speed from the sensor.

Abstract: An ultrasonic blood pressure measuring device measures the blood pressure of a blood vessel by performing transmission of an ultrasonic wave and reception of a reflected wave with respect to the blood vessel using an ultrasonic probe. A blood vessel position determination unit determines the position of the blood vessel with respect to the ultrasonic probe based on the reception signal of the ultrasonic probe. A blood pressure measurement execution unit executes blood pressure measurement based on the relative position of the blood vessel determined by the blood vessel position determination unit.

Abstract: A blood pressure measurement apparatus includes a sensor, an input section, and a circuit. The sensor is configured to measure blood flow speed in a target blood vessel. The input section is configured to input blood pressure from a measurement apparatus continuously measuring the blood pressure. The circuit is configured to estimate the blood pressure on the basis of the blood flow speed by referencing a correlation formula that indicates correlation characteristics of the blood pressure from the measurement apparatus and the blood flow speed from the sensor.

Abstract: A scanning line immediately above a blood vessel is detected using a received signal of a reflected wave of an ultrasonic wave transmitted to the blood vessel, and candidates for front and rear walls of the blood vessel are detected based on the received signal of the scanning line. Then, vascular front and rear walls pairs of front and rear walls among the candidates are narrowed down, and the narrowed-down vascular front and rear walls pair is regarded as one blood vessel and artery/vein identification is performed for each blood vessel. Measurement of vascular function information is performed for the blood vessel determined to be an artery.

Abstract: A scanning line immediately above a blood vessel is detected using a received signal of a reflected wave of an ultrasonic wave transmitted to the blood vessel, and candidates for front and rear walls of the blood vessel are detected based on the received signal of the scanning line. Then, vascular front and rear walls pairs of front and rear walls are narrowed down from the candidates, and the narrowed-down vascular front and rear walls pair is regarded as one blood vessel and artery/vein identification is performed for each blood vessel. Measurement of vascular function information is performed for the blood vessel determined to be an artery. Determination of an artery/vein is performed based on the relative relationship between the contraction time and the expansion time of the blood vessel.

Abstract: In an ultrasound blood pressure monitor 1, blood flow speed in a measurement target blood vessel of a patient is gauged using a blood flow speed sensor section. The blood pressure of the patient is estimated using a blood pressure estimation section on the basis of results of the gauging of the blood flow speed sensor section by referencing a correlation formula which is expressed by correlation characteristics of the blood pressure and the blood flow speed of the patient which was found in a first correction process. Along with this, the correlation formula is corrected using a first correction section by rederiving the correlation formula using measurement values which are continuously input from a tonometry blood pressure monitor.

Abstract: Scanning lines immediately above the blood vessel are detected using received signals of reflected waves obtained when ultrasonic waves transmitted to the blood vessel are reflected from the blood vessel, and candidates at depth positions that seem to be front and rear walls of the blood vessel are detected based on the received signals of the scanning lines. Then, vascular front and rear walls pairs of front and rear walls are narrowed down from the candidates, and the narrowed-down vascular front and rear walls pair is regarded as one blood vessel and artery/vein identification is performed for each blood vessel. Measurement of vascular function information is performed for the blood vessel determined to be an artery.

Abstract: A region of interest which is considered to be a vascular wall of an artery is set in a B-mode image, and tracking processing is performed for each region of interest. A maximum displacement velocity Vu in a positive direction and a maximum displacement velocity Vd in a negative direction are obtained as a peak value of a displacement velocity of the vascular wall. If a first peak ratio (Vu/Vd) of a region of interest corresponding to an anterior wall is equal to or greater than a predetermined first feature threshold value (for example, 2.0) using the obtained maximum displacement velocity Vu in the positive direction and maximum displacement velocity Vd in the negative direction, it is determined that the region of interest is an artery.