Individualized Positive End-expiratory Pressure Evaluation Using the Intratidal Compliance-volume Profile in Children

Individualized Positive End-expiratory Pressure Evaluation Using the Intratidal Compliance-volume Profile in Children

The investigators assess the changes in respiratory compliance according to different levels of positive end expiratory pressure (PEEP) in children under general anesthesia. In addition, the investigators evaluate the intratidal compliance-volume profile at each PEEP level and determine the optimal PEEP level during anesthesia.

Inclusion Criteria:

• Children undergoing surgery more than 1 hour under general anesthesia
• American Society Anesthesiologist physical status I, II

Exclusion Criteria:

• History of lung resection
• History of bronchopulmonary dysplasia or respiratory distress syndrome
• Abnormalities in chest radiography
• Laparoscopic surgery
• Abdominal surgery