Device and method for the continuous non-invasive measurement of blood pressure

1. A device for use in monitoring blood pressure, the device being configured to be communicatively connected to a first blood pressure measurement device and to a second blood pressure measurement device, the device comprising:

a controller configured to

monitor a first blood pressure measurement based on a first blood pressure signal received from the first blood pressure measurement device;

calculate a med-dia-ratio using the first blood pressure signal only, the med-dia-ratio being based on a mean arterial pressure of the first blood pressure signal, a diastolic pressure of the first blood pressure signal, and a systolic pressure of the first blood pressure signal;

initiate acquiring a second blood pressure measurement based on a second blood pressure signal from the second blood pressure measurement device if the med-dia-ratio exceeds a predetermined threshold;

re-calibrate the first blood pressure measurement based on the second blood pressure measurement if the first blood pressure measurement differs from the second blood pressure measurement by more than a predetermined amount; and

inhibit initiating acquiring a second blood pressure measurement if a second blood pressure measurement has been taken during a predetermined preceding period of time and if the first blood pressure measurement was not recalibrated in view of the second blood pressure measurement.

2. The device according to claim 1 , wherein the acquisition of the second blood pressure measurement is initiated if the med-dia-ratio falls below 21 percent or if the med-dia-ratio exceeds 51 percent.

3. The device according to claim 1 , wherein the controller is further configured to inhibit initiating acquiring a second blood pressure measurement based on a specific predetermined threshold being exceeded, if, during a predetermined preceding period of time, a second blood pressure measurement has been taken based on said predetermined threshold being exceeded and the first blood pressure measurement was not recalibrated.

4. The device according to claim 1 , further comprising an arm cuff or a finger cuff.

5. The device according to claim 1 , wherein the med-dia-ratio (MD) is:

M

⁢

⁢

D

=

M

⁢

⁢

A

⁢

⁢

P

-

P

dia

P

sys

-

P

dia

where MAP is the mean arterial pressure of the first blood pressure signal, P dia is the diastolic pressure of the first blood pressure signal, and P sys is the systolic pressure of the first blood pressure signal.

6. A method for monitoring blood pressure, the method being performed in a device that is communicatively connected to a first blood pressure measurement device and a second blood pressure measurement device, the method comprising:

monitoring a first blood pressure measurement based on a first blood pressure signal received from the first blood pressure measurement device;

calculating a med-dia-ratio using the first blood pressure signal only, the med-dia-ratio being based on a mean arterial pressure of the first blood pressure signal, a diastolic pressure of the first blood pressure signal, and a systolic pressure of the first blood pressure signal;

initiating acquiring a second blood pressure measurement based on a second blood pressure signal from the second blood pressure measurement device if the med-dia-ratio exceeds a predetermined threshold;

re-calibrating the first blood pressure measurement based on the second blood pressure measurement if the first blood pressure measurement differs from the second blood pressure measurement by more than a predetermined amount; and

inhibiting initiating acquiring a second blood pressure measurement if a second blood pressure measurement has been taken during a predetermined preceding period of time and if the first blood pressure measurement was not recalibrated in view of the second blood pressure measurement.