A clinical comparative study of multi slice spiral CT and DSA in diagnosis of aortic dissection

WANG Lin; CHEN Xiangrong; HUANG Yongchu

doi:10.3969/j.issn.1002-7386.2017.02.008

Abstract：Objective To investigate the clinical value of multi-slice spiral CT and DSA in diagnosis of aortic dissection.Methods Forty-six patients with suspected aortic dissection who were diagnosed and treated in our hospital from May 2012 to March 2016 were enrolled in the study .These patients were examined by DSA and multi-slice spiral CT , respectively .Then the diagnostic value of two diagnostic methods was evaluated and compared by taking the postoperative diagnosis results as gold standard .Results There were no significant differences in the detection rates of true and false lumen and intimal flap between multislice spiral CT and DSA ( P >0.05).The detection rates of aortic dissection and the number of branches by DSA were significantly lower than those by multislice spiral CT ( P <0.05).There were no significant differnces in the measured values of the first crevasse size , distance from the first crevasse to the left subclavian artery ( LSA) ,the LSA plane thoracic aortic maximum diameter and true lumen distal diameter of aortic dissection between multi -slice spiral CT and DSA ( P >0.05).The sensitivity,accuracy and specificity of DSA in diagnosis of aortic dissection were 0.976,0.667, 0.8, respectively,and which were 0.951, 0.662, 0.8, respectively in multislice spiral CT .The Kappa test showed that both diagnostic methods had good consistency with gold standard .Conclusion The two diagnostic methods in diagnosis of aortic dissection have higher consistency with gold standard , but multi-slice spiral CT has wider application range ,with higher safety , thus,which has higher clinical application value .