The aim of this study was to assess the mean positive end expiratory pressure (PEEP) during use of the Quake, a relatively new device, in healthy volunteers. Participants were 62 subjects of both sexes aged 18 to 30 years old, who were submitted to: pulmonary function tests; expiratory peak flow evaluation; the Borg scale; assessment of oxygen saturation; and use of the device, coupled to a manometer, in two sequences, of 10 and 20 breaths per minute, with monitoring by visual feedback. Data were statistically analysed. Significant differences between pressures were found only at the 10-breath per minute sequences (p=0.03). When comparing pressures between the sequences, values were significantly lower in the 10-breath per minute sequence (29.42±8.04 cmH2O; p=0.03). No correlations were found between pressures and pulmonary function test measures, age, or expiratory peak flow. A weak, significant correlation was found between Borg scale scores and pressures before (r=0.36; p=0.003) and after (r=0.31; p=0.014) the 20-breath per minute sequence, the same occurring with oxygen saturation. In healthy volunteers, then, Quake PEEP values are higher during the quickest (20-breath per minute) sequence, which also requires more exeertion.
Equipment and supplies; Physical therapy modalities; Positive-pressure respiration
