Figure 1.

IBPs measured at different volumes of saline and IGP: early versus late. Shown are the intra-bladder pressures (IBPs) measured at different volumes of saline (black circle indicates early recording, and white circle indicates late recording) and intra-gastric pressure (IGP; black square) at 10 cmH₂O of positive end-expiratory pressure. ^P < 0.05 versus 50 and 100 ml saline; *P < 0.05 versus 50, 100, and 150 ml saline; °P < 0.05 versus late recording; ^†P < 0.05 versus intra-bladder pressure.