In trauma patients, the incidence of pulmonary contusion is frequent. Recruit maneuver using lung ultrasound could be improve oxygenation in trauma populatioin, howevere, there is no previous study. The aim of this study is evaluation of the efficacy of lung recruitment using ultrasound in perioperative period in trauma patients.

In trauma patients, the incidence of pulmonary contusion is 17-75%. Pulmonary contusioin leads to atelectasis, lung consolidatioin. Finally it could results acute respiratory distress syndrome.

Lung ultrasound is non-invasive and available in anytime even during surgery. Previous studies showed recruitment maneuver using ultrasound improved postoperative oxygenation in pediatric cardiac surgery. In adults, recruitment maneuver not using ultrasound improved oxygenation after cardiopulmonary bypass. There is no study in adult trauma population.

The aim of this study is evaluation of the efficacy of lung recruitment using ultrasound in perioperative period in trauma patients.

Inclusion Criteria:

• Who need surgery under general anesthesia due to trauma
• The position of the surgery is supine

Exclusion Criteria:

• Who has been ventilator care before the surgery
• Thoracic surgery
• Who had cardiopulmonary resuscitation
• Who has acute respiratory distress syndrome