SPHYGMOMANOMETER, EVALUATION SYSTEM, AND METHOD FOR CONTROLLING SPHYGMOMANOMETER

A sphygmomanometer is provided with a pressure control unit (302) for controlling a cuff pressure indicating the internal pressure of a cuff mounted to a measurement portion of a subject, and a calculation unit (306) for calculating blood pressure information of the subject on the basis of a cuff pressure signal indicating the cuff pressure and a pulse wave signal superposed on the cuff pressure signal. The calculation unit (306) calculates first blood pressure information of the subject, the subject maintaining a recumbent state for a predetermined time. The pressure control unit (302) maintains the cuff pressure at a first pressure a predetermined value smaller than the highest blood pressure included in the first blood pressure information. The sphygmomanometer is further provided witha determination unit (310) for determining whether the amplitude of the pulse wave signal of the subject is equal to or greater than a threshold value when the cuff pressure is maintained at the firstpressure and the subject