Automatic blood-pressure measuring apparatus
First Claim
1. An automatic blood pressure measuring apparatus for automatically measuring a blood pressure of a subject having a heartbeat, comprising:
- a pressing device including an inflatable cuff for pressing a body portion of said subject;
detecting means for detecting a pressure in said cuff;
first blood pressure measuring means for detecting pulse sounds which are produced from said body portion as the pressure of said cuff is varied, and determining as a first blood pressure of said subject a pressure of said cuff detected by said detecting means at a time of detection of at least one of an appearance and a disappearance of said pulse sounds;
second blood pressure measuring means for detecting an oscillatory pressure wave which is produced from said body portion and transmitted to said cuff in synchronization with said heartbeat of said subject as the pressure of said cuff is varied, and determining as a second blood pressure of said subject a pressure of said cuff detected by said detecting means at a time of detection of a significantly large variation in amplitude of said oscillatory pressure wave; and
judging means for judging at least one of said first and second blood pressures to be abnormal if a degree of inequality between said first and second blood pressures exceeds a reference valve.
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Accused Products
Abstract
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.
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Citations
9 Claims
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1. An automatic blood pressure measuring apparatus for automatically measuring a blood pressure of a subject having a heartbeat, comprising:
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a pressing device including an inflatable cuff for pressing a body portion of said subject; detecting means for detecting a pressure in said cuff; first blood pressure measuring means for detecting pulse sounds which are produced from said body portion as the pressure of said cuff is varied, and determining as a first blood pressure of said subject a pressure of said cuff detected by said detecting means at a time of detection of at least one of an appearance and a disappearance of said pulse sounds; second blood pressure measuring means for detecting an oscillatory pressure wave which is produced from said body portion and transmitted to said cuff in synchronization with said heartbeat of said subject as the pressure of said cuff is varied, and determining as a second blood pressure of said subject a pressure of said cuff detected by said detecting means at a time of detection of a significantly large variation in amplitude of said oscillatory pressure wave; and judging means for judging at least one of said first and second blood pressures to be abnormal if a degree of inequality between said first and second blood pressures exceeds a reference valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification