title: [Color-coded duplex ultrasonography in the diagnosis of renal artery stenosis].
abstract: OBJECTIVE
  Colour-coded duplex sonography was performed for diagnosis of renal artery stenosis to define standards and criteria for stenosis.
  
  
  METHODS
  In 20 normotensive volunteers and 123 patients with arterial hypertension, bilateral intrarenal Doppler spectra were examined and the following parameters including side ratios were calculated: pulsatility index (PI), resistance index (RI), acceleration time index (AT) and acceleration index (AI).
  
  
  RESULTS
  In 29 of the 123 patients, angiography showed unilateral renal artery stenosis. Acceleration index (AI) was found as the most reliable parameter with a sensitivity of 100% and a specificity of about 94% for stenoses grading at least 70%.
  
  
  CONCLUSIONS
  Colour-coded duplex sonography can depict relevant stenoses reliably, but anatomical variations may limit its value as a single screening method. Colour-coded duplex sonography can be, therefore, recommended as an adjunct to angiography for assessment of haemodynamic relevance.
authors.affiliation: Klinik für Radiologische Diagnostik der RWTH Aachen.
authors.forename: F
authors.initials: F
authors.lastname: Speckamp
authors.forename: D
authors.initials: D
authors.lastname: Vorwerk
authors.forename: K
authors.initials: K
authors.lastname: Schürmann
authors.forename: J H
authors.initials: JH
authors.lastname: Risse
authors.forename: M
authors.initials: M
authors.lastname: Kilbinger
authors.forename: J
authors.initials: J
authors.lastname: Tacke
authors.forename: R W
authors.initials: RW
authors.lastname: Günther
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015901:Angiography, Digital Subtraction; D002648:Child; D003937:Diagnosis, Differential; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012078:Renal Artery Obstruction / Q000000981:diagnostic imaging*; D012680:Sensitivity and Specificity; D018615:Ultrasonography, Doppler, Color
vernacular_title: Farbkodierte Duplexsonographie in der Erkennung von Nierenarterienstenosen.