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The effect of experimentally induced carbon dioxide pneumoperitoneum on intra-abdominal and intra-esophageal pH

Results: In the CO2 group, IA and IE pH values significantly decreased (P < 0.05). IA pH values decreased in the CO 2 group when compared to the control and O 2 groups (P < 0.05). There was not a significant difference in IE pH between the CO2 group and the other groups. Conclusion: CO2 insufflation decreased IA pH values. Decreased pH values obtained with continuous recordings of the esophagus may have been related to increases in intra-abdominal pressure, rather than the metabolic effects of CO2 pneumoperitoneum.