title: [The clinical research of contrast-enhanced sonography in evaluating renal cortical perfusion during follow up of PTRAS].
abstract: OBJECTIVE
  To investigate the feasibility of contrast-enhanced sonography in the evaluating renal cortical perfusion.
  
  
  METHODS
  Thirteen patients with renal artery stenosis (RAS) >or= 50% were included. Technos Du8 and CnTI technology were used in the pre and post treatment of percutaneous transluminal renal artery angioplasty with stent (PTRAS). Differences in area under curve (AUC) were used to quantitate renal cortex perfusion change during follow up of PTRAS.
  
  
  RESULTS
  Contrast-enhanced sonography showed significantly reduced peak flow rate by improving the renal trunk artery patency with PTRAS. AUC ratio was (6.41 +/- 38.14)% in PTRAS renal vs (-9.65 +/- 24.35)% in contralateral renal during 3 - 6 months follow up (P > 0.05). They had no statistical difference. Otherwise, Severe stenosis of renal artery (>or= 75%) show the decreased AUC ratio of (-5.19 +/- 45.88)% in 7 cases vs (19.95 +/- 23.61)% with midrange stenosis (50% - 75%) in 6 cases (P < 0.05).
  
  
  CONCLUSIONS
  Contrast-enhanced sonography may provide a sensitive detection of change of the renal cortical microcirculation with the helpful to estimate therapeutic effect of PTRAS.
authors.affiliation: Vasculary Department, Renji Hospital, Shanghai Jiaotong University, Shanghai, China.
authors.forename: Lan
authors.initials: L
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Liang
authors.forename: Guan-hua
authors.initials: GH
authors.lastname: Xue
authors.forename: Meng
authors.initials: M
authors.lastname: Ye
authors.forename: Hua
authors.initials: H
authors.lastname: Fang
authors.forename: Ji-wei
authors.initials: JW
authors.lastname: Zhang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000800:Angioplasty, Balloon; D003287:Contrast Media; D005260:Female; D006801:Humans; D007668:Kidney / Q000098:blood supply*; D007672:Kidney Cortex / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D012077:Renal Artery / Q000000981:diagnostic imaging; D012078:Renal Artery Obstruction / Q000000981:diagnostic imaging*; D014463:Ultrasonography
chemical_list: D003287:Contrast Media