Figure 3
From: Automatic detection of patient-ventilator asynchrony by spectral analysis of airway flow
Waterfall ensembles featuring 48 spectra during the two-hour period of observation. Frequencies shown as cycles per minute (cpm). Panel A corresponds to a patient with no asynchrony. Panel B is that of an asynchronous patient. Panel C is an initially synchronous patient who develops asynchrony upon cessation of sedation. cpm, cycles per minute; DC, zero frequency amplitude; h, hours; H1, first harmonic peak amplitude; L/minute, liters per minute.