Purpose:Traumatic diaphragmatic rupture (TDR) needs early diagnosis and operation.However,the early diagnosis is usually difficult,especially in the patients without diaphragmatic hia.The objective of this study was to explore the early diagnosis and treatment of TDR.Methods:Data of 256 patients with TDR treated in our department between 1994 and 2013 were analyzed retrospectively regarding to the diagnostic methods,percentage of preoperative judgment,incidence of diaphragmatic hia,surgical procedures and outcome,etc.Two groups were set up according to the mechanism of injury (blunt or penetrating).Results:Of 256 patients with a mean age of 32.4 years (9-84),218 were male.The average ISS was 26.9 (13-66);and shock rate was 62.9％.There were 104 blunt injuries and 152 penetrating injuries.Preoperatively diagnostic rate was 90.4％ in blunt injuries and 80.3％ in penetrating,respectively,P ＜ 0.05.The incidence of diaphragmatic hia was 94.2％ in blunt and 15.1％ in penetrating respectively,P ＜ 0.005.Thoracotomy was performed in 62 cases,laparotomy in 153,thoracotomy plus laparotomy in 29,and combined thoraco-laparotomy in 12.Overall mortality rate was 12.5％ with the average ISS of 41.8;and it was 21.2％ in blunt injuries and 6.6％ in penetrating,respectively,P ＜ 0.005.The main causes of death were hemorrhage and sepsis.Conclusions:Diagnosis of blunt TDR can be easily obtained by radiograph or helical CT scan signs of diaphragmatic hia.For penetrating TDR without hia,offside sign is helpful as initial assessment.CT scan with coronal/sagittal reconstruction is an accurate technique for diagnosis.All TDR require operation.Penetrating injury has a relatively better prognosis.