Disclosed is an automatic
blood pressure measuring instrument and method designed to obtain a
pulse wave signal and electrocardiogram (ECG) signals from a
pressure sensor and an
ECG monitor, to analyze correlation between both signals, to operate a maximum
blood pressure and a minimum
blood pressure based on the analyzed data, and to output the operated result to a display. The automatic blood pressure
measuring instrument comprises a
pressure sensor for obtaining a
pulse wave from a
wrist of the subject, a
pulse wave signal processing section for amplifying, filtering and
noise-removing the pulse wave applied from the
pressure sensor, an electrocardiogram monitor for measuring a systolic blood pressure and a diastolic blood pressure and converting the measured results into electrical signals, an electrocardiogram
signal processing section for amplifying, filtering and
noise-removing the converted electrocardiogram measurement signals applied from the electrocardiogram monitor, an A / D converting section for converting the AC signals, which are applied from both the pulse wave
signal processing section and the electrocardiogram
signal processing section, into DC signals, a controlling section for comparing and analyzing the pulse wave signal and the electrocardiogram signals applied through the A / D converting section to operate the blood pressure of the subject, and a display for displaying the blood pressure of the subject operated at the controlling section.