investigation of the performance of the heart

摘要

A patient inserts a finger (12) into a cup containing an inflatable sleeve (13) and a piezoelectric film (11) in contact with the finger for providing a pulse signal. The inflatable cuff (13) is inflated to a pressure corresponding to a predetermined pressure within the range of significantly above the diastolic pressure of the patient and substantially half the diastolic pressure. The pulse signal is coupled to a computer (15). The computer (15) displays or prints out signals representative of the pulse signal amplitude and rate, its derivative and integral. IMAGE