All the patients will receive laparoscopic surgery using carbon dioxide (CO2 ) gas as distension medium. At the end of the surgery, in the control group C, CO2 was removed by passive exsufflation through the port site. In the intervention group A, at the end of the surgery, the upper part of the abdominal cavity was evenly and bilaterally filled with the 0.9% normal saline in the amount of 500 cc. We will leave the fluid in the abdominal cavity. Then, patients will be placed in the Trendelenburg position (30 degrees), and a pulmonary recruitment maneuver consisting of five manual pulmonary inflations was performed with a maximum pressure of 60 cm H2O. The anesthesiologists held the fifth positive pressure inflation for approximately 5 seconds. During these maneuvers, the surgeon was instructed to ensure that the trocar sleeve valve was fully open to allow the CO2 gas to escape.