Fraction of Inspired Oxygen and Atelectasis in Children

Effects of Fraction of Inspired Oxygen on Atelectasis in Mechanically Ventilated Children

Investigators hypothesized that maintaining low fraction of inspired oxygen would be beneficial to prevent anesthesia-induced atelectasis in mechanically ventilated children undergoing general anesthesia.

Inclusion Criteria:

• Expected operation time between 1 to 3 hours under general anesthesia
• Mechanically ventilated after endotracheal intubation

Exclusion Criteria:

• Cardiac, thoracic, abdominal surgery
• History of surgery on the lungs
• Laparoscopic surgery
• Abnormal preoperative chest radiograph findings including atelectasis, pneumothorax, pleural effusion, and pneumonia
• Considered inappropriate by the investigator