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1. An optical-based oscillometric blood pressure measurement device for measuring arterial blood pressure, comprising: a cuff that is configured to fit on a blood pressure measurement site to compress an artery of the measurement site; an inflation/deflation unit that consists of a piezoelectric pump and a valve, to increase and decrease a pressure inside the cuff; a pressure detection unit that detects a cuff pressure, which is the pressure inside the cuff; one or more light-emitting diode and photodiode pairs, to generate plethysmogram; a volume detection unit that detects an arterial volume signal indicating a volume of the artery per unit length; a control unit that sets the cuff pressure by controlling the inflation/deflation unit; and an extraction unit that extracts the relationship of the arterial volume with a transmural pressure as defined by the difference between the arterial pressure and the cuff pressure, wherein the extraction unit measures the volume and pressure waveforms to detect systolic, diastolic, and the mean arterial pressure for each heartbeat of a subject, wherein the pressure waveforms are derived from a starting point, a flat phase, a ramp up phase, and a stop point; and wherein the extraction unit is configured to utilize a curve fitting method for performing a breathing noise removal process for eliminating noises introduced by breathing by the subject, wherein the breathing noise removal process is performed by a sinusoidal function Fb=k×sin(2π(α xi+β)), wherein k, α, and β are parameters required to define the sinusoidal function, and xi is a time series at systolic or diastolic peaks.
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