Blood pressure monitor
First Claim
1. A blood pressure monitor comprising:
- an inflatable cuff which is adapted to be wound around a body portion of a living subject to press said body portion;
a pressure sensor which detects a pressure in said cuff;
a cuff-pressure regulating device which increases the pressure of said cuff;
pulse-amplitude determining means for determining an amplitude of each of the pulses of a pulse wave which are produced in said cuff and detected by said pressure sensor while the pressure of said cuff is increased by said cuff-pressure regulating device;
candidate determining means for determining, as a diastolic blood pressure candidate, a pressure of said cuff which is detected by said pressure sensor and which corresponds to an amplitude of a first pulse of said pulses determined by said pulse amplitude determining means, by judging whether the amplitude of said first pulse is not greater than a reference value which is smaller than an amplitude of at least one second pulse of said pulses, by a predetermined proportion of the amplitude of the second pulse, the amplitude of said at least one second pulse being determined by said pulse-amplitude determining means after the amplitude of the first pulse is determined; and
blood-pressure determining means for determining, as a monitor diastolic blood pressure value, said pressure of said first cuff corresponding to said amplitude of said first pulse, when said candidate determining means determines that said pressure of said cuff corresponding to said amplitude of said first pulse is a diastolic blood pressure candidate, with respect to a predetermined number of said at least one second pulse.
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Accused Products
Abstract
A blood pressure monitor including a cuff, a pressure sensor which detects a pressure in the cuff, a pressure regulating device which increases the pressure of the cuff, a pulse-amplitude determining device for determining an amplitude of each of pulses of a pulse wave which are produced in the cuff and detected by the pressure sensor while the cuff pressure is increased, a candidate determining device for determining, as a diastolic BP candidate, a pressure of the cuff which is detected by the pressure sensor and which corresponds to an amplitude of a first pulse of the pulses determined by the pulse-amplitude determining device, by judging whether the amplitude of the first pulse is not greater than a reference value which is smaller than an amplitude of at least one second pulse of the pulses, by a predetermined proportion of the amplitude of the second pulse, the amplitude of the second pulse being determined by the pulse-amplitude determining device after the amplitude of the first pulse is determined, and a BP determining device for determining, as a monitor diastolic BP value, the cuff pressure corresponding to the amplitude of the first pulse, when the candidate determining device determines, as the diastolic BP candidate, the cuff pressure corresponding to the amplitude of the first pulse, with respect to a predetermined number of the one or more second pulses.
50 Citations
11 Claims
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1. A blood pressure monitor comprising:
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an inflatable cuff which is adapted to be wound around a body portion of a living subject to press said body portion; a pressure sensor which detects a pressure in said cuff; a cuff-pressure regulating device which increases the pressure of said cuff; pulse-amplitude determining means for determining an amplitude of each of the pulses of a pulse wave which are produced in said cuff and detected by said pressure sensor while the pressure of said cuff is increased by said cuff-pressure regulating device; candidate determining means for determining, as a diastolic blood pressure candidate, a pressure of said cuff which is detected by said pressure sensor and which corresponds to an amplitude of a first pulse of said pulses determined by said pulse amplitude determining means, by judging whether the amplitude of said first pulse is not greater than a reference value which is smaller than an amplitude of at least one second pulse of said pulses, by a predetermined proportion of the amplitude of the second pulse, the amplitude of said at least one second pulse being determined by said pulse-amplitude determining means after the amplitude of the first pulse is determined; and blood-pressure determining means for determining, as a monitor diastolic blood pressure value, said pressure of said first cuff corresponding to said amplitude of said first pulse, when said candidate determining means determines that said pressure of said cuff corresponding to said amplitude of said first pulse is a diastolic blood pressure candidate, with respect to a predetermined number of said at least one second pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification