A Prospective Randomized Controlled Study Comparing the Clinical Effects of Surgical and Non-surgical Treatment of Low Rib Fractures

Inclusion Criteria: * Patients with chest trauma only and unilateral low rib fractures Three rib fractures and more Displacement of the broken end of the fracture (bicortical fracture and not in the same line) Time from injury to hospital \< 24 hours Age 18-70 ASA grade I-II Preoperative arterial oxygen partial pressure \>60mmHg, carbon dioxide partial pressure \<50mmHg The participate is volunteer in the study and sign the informed consent Pain score( Number Rating Scale, NRS) \>5 under calm breathing Exclusion Criteria: * Difficult airway History of esophageal reflux Myasthenia gravis Coagulation disorders Gastrointestinal ulcer Gastrointestinal bleeding Anesthetic drugs allergy history Asthma Chronic obstructive pulmonary disease Pregnant women