Electronic hemomanometer and blood pressure measuring method of electronic hemomanometer
First Claim
1. An electronic blood pressure monitor having a cuff adapted for attachment to a subject and pressurized and depressurized to measure said subject'"'"'s blood pressure, comprising:
- a pulse wave detector detecting said subject'"'"'s pulse wave as said cuff occludes said subject;
a mean blood pressure estimator estimating said subject'"'"'s mean blood pressure from said pulse wave detected by said pulse wave detector;
a diastolic blood pressure detector detecting said subject'"'"'s diastolic blood pressure; and
a systolic blood pressure calculator calculating said subject'"'"'s systolic blood pressure from said estimated mean arterial pressure, said detected diastolic blood pressure and a waveform of said pulse.
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Accused Products
Abstract
Oscillometry or another method is employed to initially determine a mean blood pressure and a diastolic blood pressure. There is a similarity between an intra-arterial pressure waveform exactly representing blood pressure and a pulse wave form generated when a cuff occludes a site to be measured. This similarity is utilized to obtain blood pressure. More specifically, the cuff occludes a site to be measured, while a pulse wave is detected. From the detected pulse wave'"'"'s maximum amplitude an estimated mean arterial pressure is obtained. The obtained estimated mean arterial pressure and the pulse wave'"'"'s minimum value are regarded as a mean blood pressure and a diastolic blood pressure, respectively. From the pulse wave'"'"'s maximum value a systolic blood pressure is obtained by an arithmetic operation.
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Citations
13 Claims
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1. An electronic blood pressure monitor having a cuff adapted for attachment to a subject and pressurized and depressurized to measure said subject'"'"'s blood pressure, comprising:
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a pulse wave detector detecting said subject'"'"'s pulse wave as said cuff occludes said subject;
a mean blood pressure estimator estimating said subject'"'"'s mean blood pressure from said pulse wave detected by said pulse wave detector;
a diastolic blood pressure detector detecting said subject'"'"'s diastolic blood pressure; and
a systolic blood pressure calculator calculating said subject'"'"'s systolic blood pressure from said estimated mean arterial pressure, said detected diastolic blood pressure and a waveform of said pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A blood pressure measurement method employing an electronic blood pressure monitor having a cuff attached to a subject and pressurized and depressurized in order to measure the subject'"'"'s blood pressure, comprising:
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detecting a pulse wave of the subject occluded by said cuff;
estimating the subject'"'"'s mean blood pressure from a pulse wave detected;
detecting the subject'"'"'s diastolic blood pressure; and
calculating the subject'"'"'s systolic blood pressure from an the estimated mean arterial pressure, the detected diastolic blood pressure and the detected pulse wave'"'"'s waveform.
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Specification