Patent ID: 8585605

Claim:
An apparatus for a continuous non-invasive and non-obtrusive monitoring of blood pressure, comprising: means for measuring a Pulse Wave parameter of a segment of an arterial tree of a subject, and for providing at least one signal representative of said Pulse Wave parameter; means for measuring a Cardiac Output parameter, and for providing at least one signal representative of said Cardiac Output parameter; and means for determining a value of blood pressure (BP) that satisfies BP = argmin BP ⁢ ⁢ d ⁡ ( PW , ⁢ ( CO , BP ) ) where PW is a measured value of the Pulse Wave parameter, (CO,BP) corresponds to a predicted value of the Pulse Wave parameter computed according to a model of the segment of the arterial tree relating a value of the Cardiac Output parameter, a value of the Pulse Wave Velocity parameter and a value of the blood pressure, which enables to calculate said predicted value of the Pulse Wave parameter from a measured value (CO) of the Cardiac Output parameter and determined values (BP) of the blood pressure, and determination of the value of the blood pressure (BP) that minimizes a distance between the value of the measured Pulse Wave parameter and the predicted value of the Pulse Wave parameter is done without performing a blood pressure calibration measurement.