Blood pressure monitoring apparatus
First Claim
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1. Blood pressure monitoring apparatus comprising:
- blood pressure measuring unit adapted to measure blood pressure in response to blood pressure measurement designation;
pulse wave acquiring unit adapted to acquire a pulse wave in a predetermined location of a living body;
pulse wave propagation time calculating unit adapted to calculate a pulse wave propagation time from the pulse wave, and one of an electrocardiogram and a pulse wave acquired from a location different from the predetermined location;
estimated blood pressure calculating unit adapted to calculate an estimated blood pressure on the basis of the pulse wave propagation time;
accelerated pulse wave calculating unit adapted to calculate an accelerated pulse wave from the pulse wave;
waveform parameter calculating unit adapted to calculate a predetermined waveform parameter from a waveform contained in the accelerated pulse wave; and
control unit adapted to provide the blood pressure measurement designation to said blood pressure measuring unit to cause said blood pressure measuring unit to measure blood pressure, if both the estimated blood pressure and the predetermined waveform parameter are abnormal.
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Abstract
In blood pressure monitoring apparatus which continuously estimates and monitors blood pressure by using the pulse wave propagation time, blood pressure fluctuation can be accurately estimated. If both blood pressure estimated from the pulse wave propagation time and a waveform parameter obtained from the accelerated pulse wave have abnormal values, it is determined that the blood pressure is truly fluctuating, and blood pressure measurement by another method, e.g., blood pressure measurement using a cuff is performed.
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Citations
23 Claims
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1. Blood pressure monitoring apparatus comprising:
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blood pressure measuring unit adapted to measure blood pressure in response to blood pressure measurement designation;
pulse wave acquiring unit adapted to acquire a pulse wave in a predetermined location of a living body;
pulse wave propagation time calculating unit adapted to calculate a pulse wave propagation time from the pulse wave, and one of an electrocardiogram and a pulse wave acquired from a location different from the predetermined location;
estimated blood pressure calculating unit adapted to calculate an estimated blood pressure on the basis of the pulse wave propagation time;
accelerated pulse wave calculating unit adapted to calculate an accelerated pulse wave from the pulse wave;
waveform parameter calculating unit adapted to calculate a predetermined waveform parameter from a waveform contained in the accelerated pulse wave; and
control unit adapted to provide the blood pressure measurement designation to said blood pressure measuring unit to cause said blood pressure measuring unit to measure blood pressure, if both the estimated blood pressure and the predetermined waveform parameter are abnormal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Blood pressure monitoring apparatus comprising:
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blood pressure measuring unit adapted to measure blood pressure by a predetermined method;
pulse wave acquiring unit adapted to acquire a pulse wave in a predetermined location of a living body;
pulse wave propagation time calculating unit adapted to calculate a pulse wave propagation time from the pulse wave, and one of an electrocardiogram and a pulse wave acquired from a location different from the predetermined location;
estimated blood pressure calculating unit adapted to calculate an estimated blood pressure by applying the pulse wave propagation time to a predetermined expression;
accelerated pulse wave calculating unit adapted to calculate an accelerated pulse wave from the pulse wave;
waveform parameter calculating unit adapted to calculate a predetermined waveform parameter from a waveform contained in the accelerated pulse wave; and
calibrating unit adapted to calibrate the expression by using a value measured by said blood pressure measuring unit, wherein if a fluctuation amount of the waveform parameter exceeds a predetermined amount, said calibrating unit performs the calibration after correcting a calibration amount which is applied when the fluctuation amount of the waveform parameter does not exceed the predetermined amount. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification