patients undergoing laparoscopic surgery will be performed pre and postoperatively lung ultrasonography. after induction of anesthesia patients will be supported by mechanical ventilation on volume controlled ventilation mode.

patients undergoing laparoscopic surgery will be performed pre and postoperatively lung ultrasonography.after induction of anesthesia patients will be supported by mechanical ventilation on pressure controlled volume guaranteed mode

after induction for anesthesia patients will be supported by mechanical ventilation on volume controlled ventilation mode

Patients undergoing laparoscopic surgery will be assigned either volume controlled mode or pressure support volume guaranteed mode. After the operation a researcher will perform lung ultrasonography postoperative at minute 5. Researcher will detect 6 region of each lung totally 12 regions . The researcher will record the modified and original lung ultrasonography scores (LUS Score) of the patients. LUS Score is a scoring system to evaluate atelectasis of lung and scores 1-3 points for each region (Min score 0 max score 36)

Patients undergoing laparoscopic surgery will be assigned either volume controlled mode or pressure support volume guaranteed mode. After the operation a researcher will perform lung ultrasonography in postoperative care unit at minute 30. Researcher will detect 6 region of each lung totally 12 regions . The researcher will record the modified and original lung ultrasonography scores (LUS Score) of the patients. LUS Score is a scoring system to evaluate atelectasis of lung and scores 1-3 points for each region.(Min score 0 max score 36)