Effect of Patient Position on Arterial, End-tidal and Transcutaneous Carbon Dioxide

Effect of Patient Position on Arterial, End-tidal and Transcutaneous Carbon Dioxide Partial Pressure in Patients Undergoing Laparoscopic Surgery

Investigators evaluate the effect of patient position (Trendelenburg and reverse Trendelenburg) on arterial, end-tidal and transcutaneous carbon dioxide partial pressure in patients undergoing laparoscopic surgery.

Investigators evaluate the effect of patient position (Trendelenburg and reverse Trendelenburg) on arterial, end-tidal and transcutaneous carbon dioxide partial pressure in patients undergoing laparoscopic surgery. Arterial carbon dioxide partial pressure is assessed intermittently before, during, and after pneumoperitoneum. End-tidal and transcutaneous carbon dioxide partial pressure are continuously monitored.

Inclusion Criteria:

• adult patients undergoing laparoscopic surgery (expected duration of pneumoperitoneum > 1 hour) in the Trendelenburg or reverse Trendelenburg positions

Exclusion Criteria:

• hemodynamically unstable patients due to decompensated heart failure, sepsis, or symptomatic arrhythmia, etc.
• symptomatic pulmonary disease, chronic obstructive pulmonary disease