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Table 3 Calibrated esophageal pressure and occlusion test results at balloon volume between 0.6 and 1.4 ml in the clinical study

From: Use of esophageal balloon pressure-volume curve analysis to determine esophageal wall elastance and calibrate raw esophageal pressure: a bench experiment and clinical study

Volume

Calibrated Pes (cmH2O)a

∆Pes/∆Paw

0.6 ml

7.0 (4.2–9.8) [0.2–13.9]

0.900 (0.837–0.983) [0.592–1.235]

0.8 ml

6.7 (4.1–9.8) [0.6–13.9]

0.968 (0.861–1.004) [0.784–1.220]

1.0 ml

6.8 (3.8–9.8) [0.9–13.9]

0.974 (0.890–1.025) [0.809–1.180]

1.2 ml

6.8 (4.0–9.7) [0.1–13.8]

0.953 (0.887–1.068) [0.812–1.352]

1.4 ml

7.0 (4.4–9.8) [0.0–13.9]

0.972 (0.881–1.062) [0.800–1.494]

p

0.977

0.067

  1. Pes Esophageal pressure, ∆Pes/∆Paw the ratio of changes in esophageal pressure and airway pressure during positive pressure occlusion test by compression of the chest wall
  2. Data are presented as median (interquartile range) [range] and were compared using Kruskal-Wallis test with post hoc comparison by Bonferroni correction
  3. aEsophageal pressure was calibrated by the product of esophageal wall elastance and the balloon volume