Contrast-enhanced Ultrasound in Detecting Endoleaks with Failed Computed Tomography Angiography Diagnosis after Endovascular Abdominal Aortic Aneurysm Repair  

作　　者：Xiao Yang Yue-Xin Chen Bo Zhang Yu-Xin Jiang Chang-Wei Liu Rui-Na Zhao Qiong Wu Da-Ming Zhang 

机构地区：[1]Department of Ultrasound, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China [2]Department of Vascular Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China [3]Department of Radiology, Peking Union Medical College Hospital, ChineseAcademy of Medical Sciences and Peking Union Medical College, Beijing 100730, China

出　　处：《Chinese Medical Journal》2015年第18期2491-2497,共7页中华医学杂志（英文版）

摘　　要：Background： Endovascular aneurysnl repair （EVAR） is one of the first-line therapies of abdominal aortic aneurysms. Postoperative endoleak is the most common complication of EVAR. Computed tomography angiography （CTA）, which is routine for follow-up, has side effects （e.g., radiation） and also has a certain percentage of missed diagnosis. Preliminary studies on contrast-enhanced ultrasound （CEUS） have shown that the sensitivity of CEUS for detecting endoleak is no lower than that of CTA. To investigate the advantages of CEUS, we conducted CEUS examinations of post-EVAR cases in which CTA failed to detect endoleak or could not verify the type of endoleak. Methods： Post-EVAR patients, who were clinically considered to have endoleak and met the inclusion criteria were enrolled between March 2013 and November 2014. All of the patients underwent color Doppler flow imaging （CDFI） and a CEUS examination. Size, location, microbubble dispersion, and hemodynamic characteristics of leaks were recorded. Comparison between the diagnosis of CEUS and CDF1 was conducted using Fisher＇s exact test and clinical outcomes of all patients were followed up. Results： Sixteen patients were enrolled, and 12 （75%） had endoleaks with verified types by CEUS. Among 12 cases of endoleaks were positive by CEUS, 10 were CDFl-positive, and the four CEUS-negative cases were all negative by CDFI. The diagnostic values of CEUS and CDFI were statistically difl＇erent （P = 0,008）. Six patients with high-pressure endoleaks received endovascular re-intervention guided by CEUS results. One patient with type Ⅲ endoleak had open surgery when endovascular repair failed. Conclusions： C EUS is a new, safe, and effective means for detection ofendoleaks post-EVAR. This technique can be used as a supplement for routine CTA follow-up to provide more detailed information on endoleak and its category.Background： Endovascular aneurysnl repair （EVAR） is one of the first-line therapies of abdominal aortic aneurysms. Postoperative endoleak is the most common complication of EVAR. Computed tomography angiography （CTA）, which is routine for follow-up, has side effects （e.g., radiation） and also has a certain percentage of missed diagnosis. Preliminary studies on contrast-enhanced ultrasound （CEUS） have shown that the sensitivity of CEUS for detecting endoleak is no lower than that of CTA. To investigate the advantages of CEUS, we conducted CEUS examinations of post-EVAR cases in which CTA failed to detect endoleak or could not verify the type of endoleak. Methods： Post-EVAR patients, who were clinically considered to have endoleak and met the inclusion criteria were enrolled between March 2013 and November 2014. All of the patients underwent color Doppler flow imaging （CDFI） and a CEUS examination. Size, location, microbubble dispersion, and hemodynamic characteristics of leaks were recorded. Comparison between the diagnosis of CEUS and CDF1 was conducted using Fisher＇s exact test and clinical outcomes of all patients were followed up. Results： Sixteen patients were enrolled, and 12 （75%） had endoleaks with verified types by CEUS. Among 12 cases of endoleaks were positive by CEUS, 10 were CDFl-positive, and the four CEUS-negative cases were all negative by CDFI. The diagnostic values of CEUS and CDFI were statistically difl＇erent （P = 0,008）. Six patients with high-pressure endoleaks received endovascular re-intervention guided by CEUS results. One patient with type Ⅲ endoleak had open surgery when endovascular repair failed. Conclusions： C EUS is a new, safe, and effective means for detection ofendoleaks post-EVAR. This technique can be used as a supplement for routine CTA follow-up to provide more detailed information on endoleak and its category.

关 键 词：Abdominal Aortic Aneurysnl： Color Doppler Flow Imaging Contrast-enhanced Ultrasound： Endoleak EndovascularAneurysm Repair 

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