Figure 3
Transesophageal pressure, as defined as the difference between the esophageal balloon internal pressure and the box internal pressure, among different box internal pressures. The green bar between − 1 and 1 cmH2O highlights defined level of accuracy of transesophageal pressure. Median transesophageal pressure varied among catheter types (N = 189, p < 0.001). Post hoc analyses: p < 0.05 SmartcathG versus Aspisafe NG+, Aspisafe NG, Smartcath. Per each catheter type, median ∆Pes/∆Pbox, ratio of the change in esophageal balloon pressure to the change in chamber pressure upon positive pressure occlusion test, Vinf, median volume of inflation of the esophageal catheter balloon (interquartile range) are showed on the top right of each graph. ∆Pes/∆Pbox was similar among catheters (N = 21, p = 0.113), while resulting inflation volumes significantly differed (N = 21, p < 0.001).
