Table 2. Gas Exchange, Hemodynamics, and Ventilatory Parameters
Data are expressed as mean ± SD;
† Sigh vs. Baseline 1, P < 0.001;
‡ Sigh vs. Baseline 1, P < 0.01.
Pao2= arterial tension of oxygen; Paco2= arterial tension of carbon dioxide; Hbo2= oxygenated hemoglobin (percent); HR = heart rate; PAs = systolic arterial pressure; PAd = diastolic arterial pressure; VE= minute ventilation; Paw = mean airway pressure; PEEP = positive end expiratory pressure; EELV = end expiratory lung volume; Crs = compliance of respiratory system; VT,PSV= tidal volume of pressure support ventilation; Ti,PSV= inspiratory time of pressure support ventilation; I:EPSV= inspiratory to expiratory ratio; RR = respiratory rate; Plat,S= higher PEEP level during BIPAP breath; Vt,s= tidal volume of sigh; Ti,S= inspiratory time of sigh; %VE,S= fraction of minute ventilation supplied by the sigh breath.