Method and arrangement for blood pressure measurement
First Claim
1. A method for blood pressure measurement, comprising applying a variable compressive acting pressure to a measuring point at a compression point by a pressure generator, and at the same time using a sensor to measure an arterial pressure pulse under the effect of the variable acting pressure on the artery at a second point, the second point being located farther away from the heart than the compression point to which the acting pressure is applied,characterized by providing a signal representing the measured value of the variable pressure acting on the measuring point at the compression point to an interpreting unit, sending a pressure pulse signal representing the measured arterial pressure pulse from the sensor to the interpreting unit, and determining diastolic pressure in the interpreting unit on the basis of the variable acting pressure when the interpreting unit detects a change in trend in a characteristic indicative of the magnitude of the pressure pulse in the pressure pulse signal from said sensor.
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Accused Products
Abstract
A method and arrangement for blood pressure measurement are disclosed. In the method, a variable, compressive, acting pressure is applied to a compression, such as a person'"'"'s extremity, by a pressure generator, and simultaneously, the effect of the variable acting pressure on the extremity is measured at a second point, the second point being farther from the heart than the compression point. The method determines diastolic and systolic pressure. The measured value of the variable acting pressure acting on the compression point is transferred to an interpreting unit, which also receives a pressure pulse generated by the heart. The pressure pulse is measured by a sensor at the second point for determining the effect of the variable acting pressure on the extremity. Further, diastolic pressure is determined int he interpreting unit based on the variable acting pressure, as the pressure when the interpreting unit detects a change in a trend of a characteristic of the pressure pulse indicative of magnitude.
74 Citations
52 Claims
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1. A method for blood pressure measurement, comprising applying a variable compressive acting pressure to a measuring point at a compression point by a pressure generator, and at the same time using a sensor to measure an arterial pressure pulse under the effect of the variable acting pressure on the artery at a second point, the second point being located farther away from the heart than the compression point to which the acting pressure is applied,
characterized by providing a signal representing the measured value of the variable pressure acting on the measuring point at the compression point to an interpreting unit, sending a pressure pulse signal representing the measured arterial pressure pulse from the sensor to the interpreting unit, and determining diastolic pressure in the interpreting unit on the basis of the variable acting pressure when the interpreting unit detects a change in trend in a characteristic indicative of the magnitude of the pressure pulse in the pressure pulse signal from said sensor.
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20. A method for blood pressure measurement, comprising applying a variable compressive acting pressure to a measuring point, at a compression point by a pressure generator, and at the same time using a sensor to measure an arterial pressure pulse under the effect of the variable acting pressure on the artery at a second point, the second point located farther away from the heart than the compression point to which the acting pressure is applied,
characterized by providing a signal representing the measured value of the variable pressure acting on the measuring point at the compression point to an interpreting unit, sending a pressure pulse signal representing the measured arterial pressure pulse from the sensor to the interpreting unit, and determining systolic pressure in the interpreting unit on the basis of the variable pressure when the interpreting unit detects a change in trend in a characteristic indicative of the magnitude of the pressure pulse in the pressure pulse signal from said sensor.
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21. A method for blood pressure measurement, comprising:
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applying a variable compressive acting pressure to a measuring point at a compression point by a pressure generator, wherein said variable acting pressure is a rising acting pressure, and at the same time using a sensor to measure an arterial pressure pulse under the effect of the variable acting pressure on the artery at a second point, the second point being located farther away from the heart than the compression point to which the acting pressure is applied, providing a signal representing the measured value of the variable pressure acting on the measuring point at the compression point to an interpreting unit, sending a pressure pulse signal representing the measured arterial pressure pulse from the sensor to the interpreting unit, and determining diastolic pressure in the interpreting unit on the basis of an acting pressure equal to the pressure acting when it is detected in pressure pulse measurement that the magnitude of the pressure pulse signal from said sensor starts to decrease. - View Dependent Claims (22)
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23. A method for blood pressure measurement, comprising:
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applying a variable compressive acting pressure to a measuring point at a compression point by a pressure generator, wherein said variable acting pressure is a rising acting pressure, and at the same time using a sensor to measure an arterial pressure pulse under the effect of the variable acting pressure on the artery at a second point, the second point located farther away from the heart than the compression point to which the acting pressure is applied, providing a signal representing the measured value of the variable pressure acting on the measuring point at the compression point to an interpreting unit, sending a pressure pulse signal representing the measured arterial pressure pulse from the sensor to the interpreting unit, and determining systolic pressure in the interpreting unit on the basis of an acting pressure equal to the pressure acting when it is detected in pressure pulse measurement that the magnitude of the pressure pulse signal from said sensor stops decreasing. - View Dependent Claims (24)
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25. A method for blood pressure measurement, comprising:
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applying a variable compressive acting pressure to a measuring point at a compression point by a pressure generator, wherein said variable acting pressure is a falling acting pressure, and at the same time using a sensor to measure an arterial pressure pulse under the effect of the variable acting pressure on the artery at a second point, the second point being located farther away from the heart than the compression point to which the acting pressure is applied, providing a signal representing the measured value of the variable pressure acting on the measuring point at the compression point to an interpreting unit, sending a pressure pulse signal representing the measured arterial pressure pulse from the sensor to the interpreting unit, and determining diastolic pressure in the interpreting unit on the basis of an acting pressure equal to the pressure acting when it is detected in pressure pulse measurement that the magnitude of the pressure pulse signal from said sensor stops increasing. - View Dependent Claims (26)
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27. A method for blood pressure measurement, comprising:
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applying a variable compressive acting pressure to a measuring point at a compression point by a pressure generator, wherein said variable acting pressure is a falling acting pressure, and at the same time using a sensor to measure an arterial pressure pulse under the effect of the variable acting pressure on the artery at a second point, the second point located farther away from the heart than the compression point to which the acting pressure is applied, providing a signal representing the measured value of the variable pressure acting on the measuring point at the compression point to an interpreting unit, sending a pressure pulse signal representing the measured arterial pressure pulse from the sensor to the interpreting unit, and determining systolic pressure in the interpreting unit on the basis of an acting pressure equal to the pressure acting when it is detected in pressure pulse measurement that the magnitude of the pressure pulse signal from said sensor starts to increase from its minimum value which substantially corresponds to zero.
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28. An arrangement for blood pressure measurement, comprising a pressure generator for applying a compressive acting pressure to a measuring point, an acting pressure measuring element, an interpreting unit arranged to determine diastolic pressure, a sensor for simultaneous measurement of the effect of the variable acting pressure on an artery at a second point and for generating a pressure pulse signal representing a measured arterial pressure pulse, said second point being farther away from the heart, i.e, closer to the end point of peripheral circulation, than the compression point to which the acting pressure is applied,
said sensor which measures the pressure pulse generated by heartbeat being coupled to said interpreting unit to which is also coupled the acting pressure measuring element, and that the interpreting unit is arranged to determine diastolic pressure on the basis of an acting pressure which is the pressure acting when the interpreting unit detects a change characteristic of diastolic pressure in a pressure pulse signal measured by the sensor which measures the artery.
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49. An arrangement for blood pressure measurement, comprising a pressure generator for applying a compressive acting pressure to a measuring point, such as a person'"'"'s extremity, the arrangement comprising an acting pressure measuring element, an interpreting unit arranged to determine systolic pressure, a sensor for simultaneous measurement of the effect of the variable acting pressure on an artery at a second point and for generating a pressure pulse signal representing a measured arterial pressure pulse, said second point being farther away from the heart than the compression point to which the acting pressure is applied,
said sensor which measures the pressure pulse generated by heartbeat being coupled to said interpreting unit to which is also coupled the acting pressure measuring element, and that the interpreting unit is arranged to determine systolic pressure on the basis of an acting pressure which is the pressure acting when the interpreting unit detects a change characteristic of systolic pressure in a pressure pulse signal measured by the sensor which measures the artery.
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51. An apparatus for determining systolic blood pressure comprising:
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a pressure cuff for applying a variable pressure to a person'"'"'s extremity;
a pressure generator connected to said pressure cuff, said pressure generator providing said variable pressure to said pressure cuff;
a measuring element for measuring the variable pressure provided by said pressure generator;
a sensor, said sensor being capable of detecting a pressure pulse in an artery in said extremity, said sensor capable of creating a pressure pulse signal; and
an interpreting unit connected to said measuring element and said sensor for determining systolic pressure, said interpreting unit being capable of determining said systolic pressure on the basis of the variable pressure measured by the measuring element and a change in trend in a characteristic indicative of the magnitude of the pressure pulse in the pressure pulse signal received from said sensor.
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52. An apparatus for determining diastolic blood pressure comprising:
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a pressure cuff sized to fit around a person'"'"'s extremity, said pressure cuff being capable of being inflated to variable pressures;
a pressure generator, said pressure generator being connected to said pressure cuff to create said variable pressure, a measuring element for measuring the variable pressure provided by said pressure generator;
a sensor, said sensor being capable of detecting a pressure pulse in an artery in said extremity, said sensor capable of creating a pressure pulse signal; and
an interpreting unit, said interpreting unit being connected to said sensor and to said measuring element, said interpreting unit being capable of determining diastolic pressure on the basis of the variable pressure measured by the measuring element and a change in trend in a characteristic indicative of the magnitude of the pressure pulse in the pressure pulse signal received from said sensor.
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Specification