title: Percutaneous nephrolithotomy (PCNL) in patients with previous open stone surgery.
abstract: OBJECTIVE
  Our objective was to investigate the effects of previous open nephrolithotomy on technical features, outcomes, and morbidities of subsequent percutaneous nephrolithotomy (PCNL).
  
  
  METHODS
  One hundred and sixty patients underwent PCNL between December 2004 and September 2006. The patients were divided into those who had previous open nephrolithotomy on the same kidney (group 1: 55 patients) and those who had no previous open surgery (group 2: 105 patients). Technical features encountered during operation and outcomes were compared between groups.
  
  
  RESULTS
  There were no significant differences between groups with respect to mean age (group 1: 42.6 +/- 10 years vs. group 2: 45.5 +/- 9.6 years), body mass index (24.8 +/- 2.11 vs. 24.6 +/- 2.14), and stone burden (385.6 +/- 140.6 mm(2 )vs. 401.05 +/- 142 mm(2)). In group 1, 28 and 27 stones were located in the right and left kidney, respectively, whereas the location was 51 and 54 for the right and left kidney, respectively, in group 2. When the groups were compared, the mean operative time was significantly longer (155 +/- 30 min vs. 137 +/- 30 min) in group 1. But there was no significant difference with respect to requirement for secondary intervention (11% vs. 10%). Sepsis developed in two patients in group 1 and one patient in group 2. One patient in group 1 died due to septic shock. Ten (18.2%) patients in group 1 and 13 (12.4%) patients in group 2 required blood transfusion.
  
  
  CONCLUSIONS
  When PCNL is performed after previous open nephrolithotomy, the operative time lengthens. But there is no difference with respect to success rate and morbidities.
authors.affiliation: Department of Urology, Bakirkoy Dr. Sadi Konuk Research and Training Hospital, Istanbul, Turkey. volkantugcu@yahoo.com
authors.forename: Volkan
authors.initials: V
authors.lastname: Tugcu
authors.forename: Fuat Ernis
authors.initials: FE
authors.lastname: Su
authors.forename: Nadir
authors.initials: N
authors.lastname: Kalfazade
authors.forename: Selcuk
authors.initials: S
authors.lastname: Sahin
authors.forename: Bedi
authors.initials: B
authors.lastname: Ozbay
authors.forename: Ali Ihsan
authors.initials: AI
authors.lastname: Tasci
mesh_terms: D000328:Adult; D000368:Aged; D016009:Chi-Square Distribution; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D009403:Nephrostomy, Percutaneous / Q000379:methods*; D012086:Reoperation; D018709:Statistics, Nonparametric; D016896:Treatment Outcome