Electronic blood pressure device

摘要

A blood pressure measuring and recording device that utilizes a piezoelectric crystal transducer for sensing the pressure of the blood in the brachial artery. The transducer is positioned in the cuff in an unrestricted manner whereby it in effect "floats". The cuff pressure and blood pressure coact to cause the crystal transducer to produce a waveform in which the relationship of the amplitudes of the positive and negative pulses indicate the systolic and diastolic pressures. Means are provided in the circuitry of the device for accurately distinguishing blood pressure pulses from spurious signals.