Abstract: An optical-based oscillometric blood pressure measurement device includes a cuff, which is pneumatically connected to an inflation/deflation unit and electronically connected to a pressure detection unit. It also includes light emission diode and photodiode pairs, and a volume detection unit that converts the plethysmogram received by the photodiode to the optical oscilloetrygram as the artery volume signal. Its control unit determines inflation/deflation slopes and the start/stop pressures and accurately traces the prescribed controller set point. Its extraction unit measures the systolic, diastolic, and mean arterial pressure accurately.