A new method for automated blood pressure measurement Angel Regueiro-Gómez and Ramón Pallás-Areny Instrumentation for the measurement of blood pressure and flow C.A. Greatorex Cuff width alters amplitude envelope of wrist cuff pressure pulse waveforms

In this paper, the oscillometric waveform measured by automatic non-invasive blood pressure meters (NIBP) is analyzed by transforming the data from the time domain to the frequency domain. The signal’s spectrum of the oscillometric waveform is in current literature badly understood or explored. The only known link between the oscillometric waveform and the blood pressure is the maximum of the oscillometry’s envelope equalling the mean arterial pressure (MAP). This link is established under the assumption that the oscillometry is an AMsignal. Unfortunately, computing the MAP is difficult in practice due to the non-sinusoidal nature of the actual measured signals. In this paper, we construct the best AM-signal approximation of the oscillometry and explore its use to compute the MAP.