Inclusion Criteria:  Over 20 years old At least 3 rib fractures due to thoracic trauma, or in compliance with the definition of flail chest. Consciousness Coma Index (GSC) 14 points or above  Exclusion Criteria:  Consciousness coma index (GSC) less than 14 points BMI> 50 Have received thoracic surgery (including patients with partial and full lobes) Patients with pacemakers Spinal lesions or fractures of spinal instability Vulnerable population Patients who need to remove more than one lung lobe during surgery