title: Evaluation of acute renal artery thrombosis or embolism with color Doppler sonography.
abstract: OBJECTIVE
  This study aimed to evaluate the value of color Doppler sonography (CDS) in the diagnosis of acute renal artery thrombosis or embolism (ARATE).
  
  
  METHODS
  We retrospectively reviewed the CDS findings of 10 patients with ARATE, which were confirmed by the clinical data and digital subtraction angiography or computed tomography (n=8) or by the results of surgical pathology (n=2). We analyzed the echogenicity and size of the kidneys on gray-scale images and blood flow parameters of the main renal artery, renal vein, and the intrarenal artery (segmental or interlobar artery) of the kidneys on CDS in all cases.
  
  
  RESULTS
  Four patients with acute main renal artery thrombosis (two transplanted kidneys and two native kidneys) correctly detected by CDS underwent emergency thrombolysis via renal artery. The results of CDS in six native kidneys with renal artery embolism included two cases with satisfactory CDS demonstrations, two cases with undetermined CDS findings, one case interpreted as severe renal artery stenosis, and one misdiagnosed case.
  
  
  CONCLUSIONS
  CDS is a useful imaging tool in the diagnosis of large renal infarcts caused by thrombosis or embolism in the main renal artery. However, small infarcts, which need other imaging modalities for further evaluation and confirmation, may be neglected by CDS.
authors.affiliation: Department of Ultrasound, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Cai
authors.forename: Yun-shu
authors.initials: YS
authors.lastname: Ouyang
authors.forename: Jian-chu
authors.initials: JC
authors.lastname: Li
authors.forename: Qing
authors.initials: Q
authors.lastname: Dai
authors.forename: Li
authors.initials: L
authors.lastname: Tan
authors.forename: Yu
authors.initials: Y
authors.lastname: Xia
authors.forename: Zhong-hui
authors.initials: ZH
authors.lastname: Xu
authors.forename: Hui-jun
authors.initials: HJ
authors.lastname: Li
authors.forename: Yu-xin
authors.initials: YX
authors.lastname: Jiang