Predictive factors for intraoperative complications in semirigid ureteroscopy: analysis of 1235 ballistic ureterolithotripsies.
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.
Fuganti
Paulo Emilio
PE
Hospital Assunção, São Bernardo do Campo, São Paulo, Brazil. paulo100urologia@hotmail.com
Pires
Silvio
S
Branco
Renato
R
Porto
José
J
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