title: Predictive factors for intraoperative complications in semirigid ureteroscopy: analysis of 1235 ballistic ureterolithotripsies.
abstract: OBJECTIVE
  To evaluate potential preoperative predictive factors for complications in ureteroscopic treatment of ureteral stones.
  
  
  METHODS
  One thousand two hundred thirty-five semirigid ureteroscopies for ureteral stones were prospectively inserted in our database and analyzed for complications. Preoperative variables evaluated were as follows: age, gender, length of symptoms, previous extracorporeal shock wave lithotripsy (ESWL), associated urinary tract infection (UTI), stone location, and degree of hydronephrosis. Univariate analysis and multivariate logistic regression were conducted.
  
  
  RESULTS
  Fifty-five (4.4%) procedures had complications. There were 8 ureteral perforations, 5 paraureteral stones, 2 ureteral avulsions, 5 mucosal eversions, 1 urethral injury, and 34 mucosal tears. In univariate analysis, age (P = .000), gender (P = .002), previous ESWL (P = .047), stone size (P = .001), and location (P = .001) were predictors of complications. Gender (P = .012), previous in situ ESWL (P = .037), stone size (P = .025), and location (P = .019) remained predictors in multivariate logistic regression.
  
  
  CONCLUSIONS
  Semirigid ureteroscopy is a safe procedure with few complications. Larger stones, proximally located (iliac vessels or above) with previous in situ ESWL in men are preoperative predictors for intraoperative complications.
authors.affiliation: Hospital Assunção, São Bernardo do Campo, São Paulo, Brazil. paulo100urologia@hotmail.com
authors.forename: Paulo Emilio
authors.initials: PE
authors.lastname: Fuganti
authors.forename: Silvio
authors.initials: S
authors.lastname: Pires
authors.forename: Renato
authors.initials: R
authors.lastname: Branco
authors.forename: José
authors.initials: J
authors.lastname: Porto
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004867:Equipment Design; D005260:Female; D006801:Humans; D007431:Intraoperative Complications / Q000453:epidemiology / Q000209:etiology*; D008096:Lithotripsy / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D014514:Ureteral Calculi / Q000628:therapy*; D020709:Ureteroscopes; D018666:Ureteroscopy