BLOOD PRESSURE MEASURING DEVICE AND BLOOD PRESSURE MEASURING METHOD
First Claim
1. A blood pressure measuring device, comprising:
- a blood flow velocity sensor part for transmitting/receiving a wave motion with respect to a body surface of a subject to blood within the body, and detecting a blood flow within the body;
a blood flow velocity sensor driving part for driving the blood flow velocity sensor part;
a blood flow velocity sensor signal calculating part for controlling the blood flow velocity sensor driving part and the blood flow velocity sensor part, and obtaining a blood flow velocity within the body;
a vascular diameter sensor part for transmitting/receiving ultrasound with respect to a blood vessel in the body, and detecting a difference in reflection arrival time for the vascular wall in the body;
a vascular diameter sensor driving part for driving the vascular diameter sensor part;
a vascular diameter sensor signal calculating part for controlling the vascular diameter sensor driving part and the vascular diameter sensor part, and obtaining the vascular diameter in the body; and
a blood pressure signal calculating part for using a result of a calculation by the blood flow velocity sensor signal calculating part and the vascular diameter sensor signal calculating part to obtain a blood pressure of the subject.
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Accused Products
Abstract
A blood pressure measuring device includes a blood flow velocity sensor detecting a blood flow within the body; a blood flow velocity sensor driver driving the blood flow velocity sensor part; a blood flow velocity sensor signal calculating part controlling the blood flow velocity sensor driver and the blood flow velocity sensor, and obtaining the blood flow velocity within the body; a vascular diameter sensor detecting a difference in reflection arrival time for the vascular wall in the body; a vascular diameter sensor driver driving the vascular diameter sensor; a vascular diameter sensor signal calculating part controlling the vascular diameter sensor driver and the vascular diameter sensor, and obtaining the vascular diameter in the body; and a blood pressure signal calculater using a result of a calculation by the blood flow velocity sensor signal calculater and the vascular diameter sensor signal calculater to obtain the blood pressure of the subject.
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Citations
8 Claims
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1. A blood pressure measuring device, comprising:
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a blood flow velocity sensor part for transmitting/receiving a wave motion with respect to a body surface of a subject to blood within the body, and detecting a blood flow within the body; a blood flow velocity sensor driving part for driving the blood flow velocity sensor part; a blood flow velocity sensor signal calculating part for controlling the blood flow velocity sensor driving part and the blood flow velocity sensor part, and obtaining a blood flow velocity within the body; a vascular diameter sensor part for transmitting/receiving ultrasound with respect to a blood vessel in the body, and detecting a difference in reflection arrival time for the vascular wall in the body; a vascular diameter sensor driving part for driving the vascular diameter sensor part; a vascular diameter sensor signal calculating part for controlling the vascular diameter sensor driving part and the vascular diameter sensor part, and obtaining the vascular diameter in the body; and a blood pressure signal calculating part for using a result of a calculation by the blood flow velocity sensor signal calculating part and the vascular diameter sensor signal calculating part to obtain a blood pressure of the subject. - View Dependent Claims (2, 3, 4, 5)
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6. A method for measuring a blood pressure of a subject in a first state in which a predetermined portion of the subject is positioned at a predetermined height, the blood pressure being proportional, by a predetermined constant of proportionality, to a value obtained by dividing the blood flow velocity at the predetermined portion by the square of the vascular diameter at the predetermined portion, the blood pressure measuring method characterized in comprising:
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obtaining the constant of proportionality; measuring the vascular diameter and the blood flow velocity at the predetermined portion in the first state; obtaining the blood pressure using the vascular diameter, the blood flow velocity, and the constant of proportionality; displaying the blood pressure; and determining whether calibration of the constant of proportionality is necessary. - View Dependent Claims (7, 8)
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Specification