title: [Experimental study with Doppler ultrasound in partial chronic obstructive uropathy].
abstract: BACKGROUND
  This study has aimed to assess the hemodynamic parameters, Renal Resistive Index (RI), Peak Systolic Velocity (PSV), End-Diastolic Velocity (EDV) and Blood Flow of the Renal Artery (FR) by Doppler Ultrasound for diagnosis and monitoring postsurgical partial chronic obstructive uropathy.
  
  
  METHODS
  Fifty pigs were used. The experiment was divided into three phases. Phase I consisted of a duplex-Doppler evaluation of the both kidneys to determine the parameters under study. The ratio of each index is calculated as the difference between the value of study kidney and the contralateral. After, a fluoroscopic examination was performed by compressive cystography, excretory urography and retrograde ureteropyelography. Finally, a model of partial right ureteral obstruction was created. After six weeks of the obstructive model, Phase II was begun with the diagnosis of the uropathy, by means of the aforementioned diagnostic methods and the endourological treatment was completed. Phase III is a follow-up performed at 6 months of treatment using the same methods as in the previous phases.
  
  
  RESULTS
  Of the parameters studied, the EDV and its ratio showed greater sensitivity and specificity as a diagnostic marker of obstructive uropathy. In the postoperative monitoring, it was observed that the RI and the EDV returned to baseline levels, with the baseline values.
  
  
  CONCLUSIONS
  The ΔEDV and its ratio is the parameter that shows the greater efficacy for the diagnosis of chronic partial obstructive uropathy, however, it is insufficient to avoid conventional diagnostic techniques. All the parameters, mainly the EDV, have proven useful as complementary tests for monitoring after endourologic resolution of obstructive uropathy.
authors.affiliation: Unidad de Endoscopia, Centro de Cirugía de Mínima Invasión Jesús Usón, Cáceres, España.
authors.forename: E
authors.initials: E
authors.lastname: Morcillo
authors.forename: C
authors.initials: C
authors.lastname: Martín
authors.forename: L A
authors.initials: LA
authors.lastname: Rioja
authors.forename: M
authors.initials: M
authors.lastname: Pamplona
authors.forename: F M
authors.initials: FM
authors.lastname: Sánchez-Margallo
authors.forename: F
authors.initials: F
authors.lastname: Soria
mesh_terms: D000818:Animals; D001284:Atrophy; D001783:Blood Flow Velocity; D003971:Diastole; D003972:Diathermy; D005260:Female; D005471:Fluoroscopy; D006439:Hemodynamics; D006869:Hydronephrosis / Q000000981:diagnostic imaging / Q000209:etiology / Q000601:surgery; D007668:Kidney / Q000098:blood supply / Q000000981:diagnostic imaging / Q000473:pathology; D012079:Renal Circulation; D012680:Sensitivity and Specificity; D034421:Sus scrofa; D013552:Swine; D013599:Systole; D018616:Ultrasonography, Doppler, Duplex; D014517:Ureteral Obstruction / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery; D018666:Ureteroscopy; D014546:Urinary Catheterization; D014655:Vascular Resistance