title: [Treatment of bladder lithiasis with shock-wave extracorporeal lithotripsy].
abstract: OBJECTIVE
  To evaluate the effectiveness and the prognostic factors of the bladder stones (BS) treatment by means of extracorporeal shock wave lythotripsy (ESWL).
  
  
  METHODS
  183 patients with BS treated using ESWL were retrospectively analysed. Independent variables were: gender, age, obstruction, BS size, BS number and amount of waves. Dependent variable was total BS resolution. Statistical analysis was provided by Cox's regression multivariate analysis, Kaplan-Meier analysis and the t Student test.
  
  
  RESULTS
  Total effectiveness of the treatment was 73%. Initial BS size was the only prognostic factor on multivariate analysis (p = 0.0035) with smaller stones obtaining the best results (log rank p = 0.00001): 92% of effectiveness in BS smaller than 1 cm2, 73% in 1-2 cm2, 57% in 2-3 cm2 and 42% in larger than 3 cm2. BS mean size decreased 2 cm2 after the first ESWL (p = 0.00001).
  
  
  CONCLUSIONS
  Initial BS size was the only prognostic factor of resolution. Total effectiveness was 73% and it highly increased in BS smaller than 2 cm2.
authors.affiliation: Servicio de Urología, Fundación Puigvert, Barcelona.
authors.forename: F
authors.initials: F
authors.lastname: Millán Rodríguez
authors.forename: J
authors.initials: J
authors.lastname: Tornero Ruiz
authors.forename: H
authors.initials: H
authors.lastname: López Llauradó
authors.forename: F
authors.initials: F
authors.lastname: Rousaud Barón
authors.forename: J
authors.initials: J
authors.lastname: Martí Malet
authors.forename: F
authors.initials: F
authors.lastname: Izquierdo Latorre
authors.forename: A
authors.initials: A
authors.lastname: Rousaud Barón
mesh_terms: D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D008096:Lithotripsy; D008297:Male; D012189:Retrospective Studies; D001744:Urinary Bladder Calculi / Q000628:therapy*
vernacular_title: Tratamiento de la litiasis vesical mediante litotricia extracorpórea por ondas de choque.