Electronic blood pressure meter having means for detecting artifacts

Claim 1

An electronic blood pressure meter, comprising: a cuff; pressurization means for pressurizing the cuff; depressurization means for depressurizing the cuff; pressure detecting means for detecting the pressure in the cuff; blood vessel information detecting means for detecting blood vessel information during the process of pressurization or depressurization of the cuff; and blood pressure values determining means for determining a systolic blood pressure and a diastolic blood pressure according to output signals from the blood vessel information detecting means and the pressure detecting means; further comprising: pulse wave component detecting means connected to the cuff, the pulse wave component detecting means being for obtaining pulse wave data; non-negative time period measuring means for measuring a non-negative time period of the pulse wave data obtained by the pulse wave component detecting means, the non-negative time period being measured relative to a certain reference level; abnormal state detecting means for detecting an abnormal state when the non-negative time period measured by the non-negative time period measuring means is greater than a certain threshold level; and wherein the abnormal state detecting means comprises a microprocessor which is repeatedly activated at a certain time interval by interrupting a main routine for normal measurement of blood pressure values.