Esophageal pressure(PesoM)was monitored through insertion of esophageal balloon. Corrected esopheageal pressure(Peso)was acquired by subtracting elastic pressure of chest wall from PesoM.

• 通过插入食道囊管监测食道压力(PesoM),经胸壁弹性压的矫正后得到矫正的食道压力(Peso)。