Figure 4
Changes in pH. Decreasing pH was observed at 30 min and 1, 1.5, and 2 hours after insufflation and desufflation compared to the baseline in the 6-mmHg group (P <0.05). After desufflation, pH levels returned to the baseline at 30 min in the 6-mmHg group. Decreasing pH was observed at 30 min and at 1, 1.5, and 2 hours after CO2 insufflation and desufflation, and at 30 min after desufflation compared with the baseline in the 9-mmHg group. Significant differences were not observed between the groups. Data are expressed as the mean ± SD. * P <0.05 versus baseline value.