According on one side, provide a kind of device, for measuring blood pressure, BP, the equipment of user, the equipment include volume fixture BP monitoring devices, the user of first part including a first pressure device for exerting ontology, first photoplethysmogram, PPG, sensor obtain body part of the first PPG signals from the first user And control unit, it is configured to analyze first PPG signal and controls the press device of pressure The first pressure equipment that wherein control unit is configured to adjust pressure keeps the first PPG signal constant levels, and determines the BP pressure of user from first pressure equipment And second sensor, and the first PPG sensors, for measuring a part of user in the second ontology of physiological characteristic, whereinSecond main body and the first main body Wherein described device is configured as the measurement analysis of measurement physiological characteristic, to determine that blood perfusion in the user of the second part of ontology, recalibrates volume fixture BP monitoring devices according to change hemoperfusion to determine whether to execute.
