Hemadynamometer
First Claim
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1. A hemadynamometer, comprising:
- a piezoelectric device for being pressed by the blood in the artery of a user to output a plurality of pulse piezoelectric signals accordingly;
a processor for comparing the waveform slope of the pulse piezoelectric signals to determine a systolic blood pressure wave and a diastolic blood pressure wave, wherein the processor determines and outputs a systolic blood pressure value and a diastolic blood pressure value corresponding to the systolic and diastolic blood pressure waves, respectively, wherein each of the pulse piezoelectric signals before the systolic blood pressure wave has a first wave and a second wave, and the systolic blood pressure wave has a first wave and a second wave, wherein a rising rate and a descending rate of the second wave of the pulse piezoelectric signal are smaller than a rising rate and a descending rate of the first wave of the pulse piezoelectric signal, respectively, a rising rate and a descending rate of the second wave of the systolic blood pressure wave being greater than a rising rate and a descending rate of the first wave of the systolic blood pressure wave, respectively; and
a display unit for displaying the systolic and diastolic blood pressure values.
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Abstract
A hemadynamometer is provided. The hemadynamometer includes a bag, an inflation unit, a deflation unit, a piezoelectric device and a processor. The bag is used for wounding on the user'"'"'s wrist or upper arm. The inflation unit is used for inflating the pressure inside the bag, and the deflation unit is used for deflating the pressure inside the bag. When the blood in the artery of the user oppresses the piezoelectric device, the piezoelectric device outputs a number of pulse piezoelectric signals accordingly. The processor is used for comparing the waveform slope of the pulse piezoelectric signals to determine a systolic blood pressure value and a diastolic blood pressure value.
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Citations
20 Claims
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1. A hemadynamometer, comprising:
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a piezoelectric device for being pressed by the blood in the artery of a user to output a plurality of pulse piezoelectric signals accordingly; a processor for comparing the waveform slope of the pulse piezoelectric signals to determine a systolic blood pressure wave and a diastolic blood pressure wave, wherein the processor determines and outputs a systolic blood pressure value and a diastolic blood pressure value corresponding to the systolic and diastolic blood pressure waves, respectively, wherein each of the pulse piezoelectric signals before the systolic blood pressure wave has a first wave and a second wave, and the systolic blood pressure wave has a first wave and a second wave, wherein a rising rate and a descending rate of the second wave of the pulse piezoelectric signal are smaller than a rising rate and a descending rate of the first wave of the pulse piezoelectric signal, respectively, a rising rate and a descending rate of the second wave of the systolic blood pressure wave being greater than a rising rate and a descending rate of the first wave of the systolic blood pressure wave, respectively; and a display unit for displaying the systolic and diastolic blood pressure values. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A hemadynamometer comprising:
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a bag for winding on a user'"'"'s wrist or upper arm; an inflation unit for inflating the pressure inside the bag; a deflation unit for deflating the pressure inside the bag; a piezoelectric device for being pressed by blood in the artery of a user to output a plurality of pulse piezoelectric signals accordingly; a processor for comparing the waveform slope of the pulse piezoelectric signals to determine a systolic blood pressure wave and a diastolic blood pressure wave, wherein the processor outputs a systolic blood pressure value and a diastolic blood pressure value according the systolic and diastolic blood pressure waves, respectively, wherein each of the pulse piezoelectric signals before the systolic blood pressure wave has a first wave and a second wave, and the systolic blood pressure wave has a first wave and a second wave, wherein a rising rate and a descending rate of the second wave of the pulse piezoelectric signal are smaller than a rising rate and a descending rate of the first wave of the pulse piezoelectric signal respectively, a rising rate and a descending rate of the second wave of the systolic blood pressure wave being greater than a rising rate and a descending rate of the first wave of the systolic blood pressure wave, respectively; and a display unit for displaying the systolic and diastolic blood pressure values. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for measuring the blood pressure, comprising:
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inflating or deflating the pressure inside a bag wound on a user'"'"'s wrist or upper arm; detecting a plurality of Pulse piezoelectric signals during the inflation or deflation step, wherein each of the pulse piezoelectric signals before the systolic blood pressure wave has a first wave and a second wave, and the systolic blood pressure wave has a first wave and a second wave, wherein a rising rate and a descending rate of the second wave of the pulse piezoelectric signal are smaller than a rising rate and a descending rate of the first wave of the pulse piezoelectric signal, respectively, a rising rate and a descending rate of the second wave of the systolic blood pressure wave being greater than a rising rate and a descending rate of the first wave of the systolic blood pressure wave, respectively; and comparing the waveform slope of the pulse piezoelectric signals to determine a systolic blood pressure value and a diastolic blood pressure value, wherein the comparing step comprises; amplifying the pulse piezoelectric signals; and comparing the waveform slope of the amplified pulse piezoelectric signals to determine a systolic blood pressure wave and a diastolic blood pressure wave, and then outputting the systolic blood pressure value and the diastolic blood pressure value based on the systolic blood pressure wave and the diastolic blood pressure wave. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification