Fig. 2. Illustration of parameters evaluated. Pao = airway opening pressure; Ppl = intrapleural pressure; D^T= inspiratory trigger delay time; P^T= inspiratory trigger pressure; PTP^T= triggering pressure time product; PTP^I= inspiratory pressure time product; P^Emax= expiratory trigger pressure; D^E= expiratory delay time; dP^AW= maximum airway pressure change; PTP^E= expiratory pressure time product; AREA-T = integration of total pressure fluctuation from P^BL.