A vital signs monitor which includes a sensor which is applied to the main artery of a patient for detecting the heart beat and blood pressure and producing electrical pulses in waveform. A computer is connected to the sensor for receiving the waveform pulses, converting the waveform pulses into digital...http://www.google.ca/patents/US4347851?utm_source=gb-gplus-sharePatent US4347851 - Vital signs monitor
