American Society of Anesthesiologists

Fig. 2.

Esophageal pressure and transpulmonary pressure. (A) Esophageal pressure measured (cm H2O) through the time course of ventilation. There were no significant differences between the four treatment groups at baseline and TARDS (after lung injury). During the 4-h ventilation, esophageal pressures were significantly lower in the high-frequency oscillatory ventilation (HFOV) groups than the conventional mechanical ventilation (CMV) groups. (B) Transpulmonary pressure measured (cm H2O) through the time course of ventilation. There were no significant differences between the four treatment groups at baseline and TARDS. During the 4-h ventilation, transpulmonary pressures were significantly lower in the HFOV-9 Hz groups than the HFOV-3 Hz and CMV groups. # P < 0.05 versus HFOV-3 Hz. §§ P < 0.01 versus CMV. ££ P < 0.01 versus baseline. ** P < 0.01 versus TARDS. H = hour; TPRM = postrecruitment maneuver.

Esophageal pressure and transpulmonary pressure. (A) Esophageal pressure measured (cm H₂O) through the time course of ventilation. There were no significant differences between the four treatment groups at baseline and T_ARDS (after lung injury). During the 4-h ventilation, esophageal pressures were significantly lower in the high-frequency oscillatory ventilation (HFOV) groups than the conventional mechanical ventilation (CMV) groups. (B) Transpulmonary pressure measured (cm H₂O) through the time course of ventilation. There were no significant differences between the four treatment groups at baseline and T_ARDS. During the 4-h ventilation, transpulmonary pressures were significantly lower in the HFOV-9 Hz groups than the HFOV-3 Hz and CMV groups. # P < 0.05 versus HFOV-3 Hz. §§ P < 0.01 versus CMV. ££ P < 0.01 versus baseline. ** P < 0.01 versus T_ARDS. H = hour; T_PRM = postrecruitment maneuver.

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