Method and arrangement for blood pressure measurement

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, 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.

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, 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.

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, 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.

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, 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.

An apparatus for determining systolic blood pressure comprising:

• 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.

An apparatus for determining diastolic blood pressure comprising:

• 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.