CUFFLESS BLOOD PRESSURE ESTIMATING DEVICE USING HYDROSTATIC PRESSURE DIFFERENCE AND OPERATING METHOD THEREOF

Disclosed is a cuffless blood pressure estimating device, which includes a hemodynamic parameter estimating circuit that measures at least two height levels based on position information output from at least one position detection sensor, measures user's bio-signals respectively at the height levels, and estimates a blood pressure from the height levels and the user's bio-signals based on a machine learning algorithm or a state estimation algorithm with a hemodynamic state space model, and at least one processor that controls the hemodynamic parameter estimating circuit.