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Objective: To utilize plain and contrast-enhanced CT for diagnosing bowel and mesenteric in blunt abdominal trauma.To explore diagnostic value of bowel and mesenteric in blunt abdominal trauma by spiral plain CT.Methods: All of 26cases with bowel and mesenteric in blunt abdominal trauma proved by surgical operation were analyzed retrospectively.All cases undergone multi-slice spiral CT plain scan and contrast-enhanced CT.Based on the contrastive analysis,the clinical significance of these features were summed up and statistical analysis with chi-square test.Results: There were no statistical difference between plain and contrast-enhanced CT in free fluid and blood in the abdominal cavity,intra-abdominal free air,effusion and hematoma of mesentery,thickness of bowel wall,enterorrexis,intestinal enlargement with fluid.There were 4vessel damage in contrast-enhanced CT.Conclusion: It is value to diagnosis bowel and mesenteric in blunt abdominal trauma by spiral plain CT.Contrast-enhanced CTcould be a valuable complementary technique following plain CT.