Figure 4
From: Automatic detection of patient-ventilator asynchrony by spectral analysis of airway flow
Asynchrony Index (AI) as a function of H 1 /DC. The average synchrony index (AI) of measurements taken at 0, 30, 60, 90 and 120 minutes plotted as a function of corresponding average H1/DC for each study patient (n = 110). H1/DC varied inversely with AI during the two-hour during observation period (AI, 39.9 - 0.6 H1/DC; r2 = 0.57, P < 0.0001). DC, zero frequency amplitude; H1, first harmonic peak amplitude.