Abstract: An arrangement (100) and a device (101) for determining pulse transit time comprise an accelerometer (102) and a pulse wave sensor (103) for sensing a pulse wave. The accelerometer (102) determines a cardiac systole, and the pulse wave sensor (103) determines the pulse wave induced by said cardiac systole ejection. A first trigger signal is determined at the moment of said determined cardiac systole, and a second trigger signal at the moment of said determined pulse wave. The pulse transit time is then determined as a time difference between said first and second trigger signals.

Abstract: A device (100) for measuring arterial (107) signals, and especially pulse wave velocity, comprises a sensor array comprising a plurality of sensors (101-04) for detecting arterial signals and providing corresponding measuring data. A signal detecting means (106) is used for detecting signal strength of each of said sensors (101-104) separately based on said measuring data of each sensor. A selection logic (108) is used for selecting the measuring data of the sensors providing signals with highest signal strength as a first measuring data (signals responsible of arterial signals), whereupon the device is configured to use said selected first measuring data for determination of pulse wave velocity and wherein measuring data of at least one another sensor not providing said first measuring data is used as a second measuring data.

Abstract: A method for measuring blood pressure of a patient continuously and non-invasively comprises measuring a first pressure signal being proportional to arterial blood pressure of the patient at a first location by a first pressure sensor (P1). In addition ambient pressure is measured by a third ambient pressure sensor (P3).

Abstract: A system for providing an early risk recognition monitoring by measurement of a peripheral tissue perfusion of a patient instead of clinically significant changes in systemic blood pressure and/or blood flow comprises a wristband device for gathering measurement data of the patient. The device measures a first temperature (t1) of the patient at the first wrist (or distal antebrachium) point and a second temperature (t2) of the patient at the second finger point, whereupon the system determines altered peripheral tissue perfusion by determining temperature gradient (?t) between said first and second points. If the gradient (?t) exceeds or deceeds a predetermined range, the system construes the exceeding as a peripheral vasoconstriction and the deceeding as a peripheral vasodilatation, and thereby provides a first early risk recognition phase (p1) and transmits it as a warning indication to end devices of health care personnel.