BACKGROUND:Spontaneous isolated superior mesenteric artery(SMA)dissection(SISMAD)is a rare cause of abdominal pain.The aim of the study is to investigate the role of a new parameter,the ratio of the SMA diameter to the superior mesenteric vein(SMV)diameter(SMA/SMV)based on non-enhanced computed tomography(CT),in the early diagnosis of SISMAD.METHODS:In a registry study from December 2013 to June 2021,97 abdominal pain SISMAD patients(SISMAD group)admitted to our hospital were enrolled.Meanwhile,the matched sex and age abdominal pain non-SISMAD patients at 1∶2 were collected in reverse chronological order as the control group.Student's t-test,Wilcoxon rank-sum test,and Chi-square test were used to compare differences between the SISMAD and control groups.MedCalc was used to generate receiver operating characteristic(ROC)curve.RESULTS:A total of 291 abdominal pain patients,including 97 SISMAD patients and 194 non-SISMAD patients,were included in the current study.The maximum SMA diameter,perivascular exudation,and SMA/SMV based on non-enhanced CT were significant between the two groups(all P＜0.05).ROC curves showed that for the maximum SMA diameter,the area under the curve(AUC),cut-off,sensitivity,and specificity were 0.926,9.80,93.8％,and 79.4％,respectively.For SMA/SMV,its AUC,cut-off,sensitivity,and specificity were 0.956,0.83,88.7％,and 92.3％,respectively.The diagnostic efficiency of SMA/SMV was better than that of the maximum SMA diameter(P＜0.05).The combined parameters of SMA/SMV and maximum SMA diameter had the best diagnostic efficiency(AUC=0.970).CONCLUSION:SMA/SMV may be a potential marker for SISMAD.

Yuan-li Lei;Wen-xing Song;Yi Lin;Hui-ping Li;He-ping Lyu;Jiao-zhen Chen;Zhang-ping Li;Jia-na Yin;Ji-ke Xue;Shou-quan Chen

Department of Emergency Medicine,the First Affiliated Hospital of Wenzhou Medical University,Wenzhou 325000,China;Department of Radiology,the First Affiliated Hospital of Wenzhou Medical University,Wenzhou 325000,China;Department of Gastroenterology,the First Affiliated Hospital of Wenzhou Medical University,Wenzhou 325000,China;Department of Vascular Surgery,the First Affiliated Hospital of Wenzhou Medical University,Wenzhou 325000,China;Department of Electrocardiogram,Wenzhou People's Hospital,Wenzhou 325000,China

世界急诊医学杂志（英文）

[1]Yuan-li Lei;Wen-xing Song;Yi Lin;Hui-ping Li;He-ping Lyu;Jiao-zhen Chen;Zhang-ping Li;Jia-na Yin;Ji-ke Xue;Shou-quan Chen-.The ratio of superior mesenteric artery diameter to superior mesenteric vein diameter based on non-enhanced computed tomography in the early diagnosis of spontaneous isolated superior mesenteric artery dissection)[J].世界急诊医学杂志（英文）,2022(03):202-207

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