Investigating the partial pressure of carbon dioxide (CO2) in the respiratory gases in Laparoscopic Gallbladder Surgery and comparing it with Arterial Partial Pressure of Carbon Dioxide

Objectives: The aim of this paper is determining the end-expiratory dioxide pressure in gallbladder laparoscopic surgery and compares it with the arterial carbon dioxide pressure. Methods: This cross-sectional study was performed on 30 patients undergoing laparoscopic cholecystectomy. At the beginning of operation, ABG sample was taken from the patient's radial artery before CO2 was injected into the abdomen. At the same time, CO2 was measured by a capnography device. At the end of surgery, ABG sample was prepared for the second time before CO2 was removed from the abdomen and CO2 was recorded simultaneously by capnography device. After collecting data from ABG samples, arterial PaCO2 was compared with those obtained from capnography device results and SPSS 16 software was used for data analysis. Results: The mean preoperative PaCO2 for laparoscopic (PaCO2-1) was 34.343 and the mean preoperative ETCO2 for laparoscopic (ETCO2-1) was 31.37. These values after laparoscopic surgery were 34.813 for PaCO2, 34.813 (PaCO2-2) and 33.13 (ETCO2-2). There was also a correlation between PaCO2-1 and ETCO2-1 results between PaCO2-2 and ETCO2-2, which was stronger between PaCO2-2 and ETCO2-2. Conclusion: There was a strong correlation between ETCO2 results from capnography and PaCO2 from ABG and to monitor carbon dioxide retention, capnography can be used as an alternative to ABG for laparoscopic gallbladder surgery patients.