Flow chart of pressure support test and spontaneous breathing trial (SBT). Flow chart of pressure support test and spontaneous breathing trial (SBT). The.

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Flow chart of pressure support test and spontaneous breathing trial (SBT). Flow chart of pressure support test and spontaneous breathing trial (SBT). The rapid shallow breathing index (RSBI) was calculated on PEEP of 4 cm H2O and without pressure support, over one minute, after the initial 30 min with pressure support of 8 cm H2O. The extubation decision was solely with the physician, who did not know the result of the calculated indexes. The physicians decided to extubate the 26 patients who successfully completed the SBT, and also one of the 21 patients who failed the SBT. That patient failed extubation due to acute respiratory distress, hypoxemia, and hypercapnia. Cdyn = dynamic compliance. PImax = maximum inspiratory pressure. f = respiratory rate. PAO2 = alveolar partial pressure of oxygen. Stéphane Delisle et al. Respir Care 2011;56:1500-1505 (c) 2012 by Daedalus Enterprises, Inc.