Apparatus and method of measuring blood pressure

An apparatus for measuring blood pressure comprising:

• a pressurizing unit for applying pressure to a blood vessel of an examinee according to a first condition or a second condition;
• a pressure sensor for sensing a sphygmus wave and a pressure of the blood vessel under the first condition or the second condition;
• a standard blood pressure calculating unit for calculating a systolic standard blood pressure and a diastolic standard blood pressure of the examinee based on the sphygmus wave and the blood vessel pressure sensed by the pressure sensor under the first condition;
• a continuous blood pressure calculating unit for calculating continuous blood pressure of the examinee based on the sphygmus wave and the blood vessel pressure sensed by the pressure sensor under the second condition and based on the systolic standard blood pressure or the diastolic standard blood pressure;
• and
• a repressurizing determining unit for determining whether pressure applied to the blood vessel during measuring of continuous blood pressure deviates from the second condition, by subtracting from an amplitude of the sphygmus wave signal sensed at a first time after starting the measurement of continuous blood pressure an amplitude of the sphygmus wave signal sensed at a second time later than the first time,
• wherein when the repressurizing determining unit determines that pressure applied to the blood vessel of the examinee deviates from the second condition, the pressurizing unit applies pressure to the blood vessel of the examinee again under the second condition.