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Table 2 Average tidal volume, inspiratory flow, and muscle pressure during the study phases

From: Do spontaneous and mechanical breathing have similar effects on average transpulmonary and alveolar pressure? A clinical crossover study

  Level of assistance   
  CMV PSV-high PSV-medium PSV-low Overall p Valuea
Tidal volume, ml 475 ± 121 479 ± 119 461.9 ± 125 449 ± 126 466 ± 118 0.95
Flow, L/min 0.49 ± 0.1 0.47 ± 0.13 0.47 ± 0.12 0.46 ± 0.16 0.47 ± 0.13 0.94
Pmus, cmH2O 0.34 ± 0.48 2.75 ± 1.41 5.42 ± 2.26 8.3 ± 2.59 4.2 ± 3.5 <0.001
  1. CMV controlled mechanical ventilation, PSV pressure support ventilation, Pmus inspiratory muscle pressure
  2. a p values were calculated using repeated measures analysis of variance