title: Comparison of shockwave lithotripsy and flexible ureteroscopy for the treatment of kidney stones in patients with a solitary kidney.
abstract: OBJECTIVE
  To compare the outcomes of these minimally invasive procedures in this patient population.
  
  
  METHODS
  The database of our institution has been retrospectively reviewed, and medical records of urolithiasis patients with a solitary kidney who underwent flexible ureteroscopy (F-URS) or extracorporeal shock wave lithotripsy (SWL) between January 2009 and December 2012 were examined. Retreatment rates, complications, changes in estimated glomerular filtration rates (eGFRs), chronic kidney disease (CKD) stages, and stone-free rates were compared between the two groups.
  
  
  RESULTS
  Stones of 48 patients (mean age: 48.8±15.4, range: 14-76) with solitary kidneys were treated with SWL (n=30, 62.5%) or F-URS (n=18, 37.5%). Patient demographics and stone related parameters were similar. The most common stone location was the pelvis in the SWL group (36.6%), whereas it was the pelvis and a calix in the F-URS group (38.8%). Complications and success rates were similar in both groups, however, patients in the SWL group needed more sessions to achieve stone clearance (2.2±0.89 vs 1.06±0.24, p=0.0001). Preoperative and postoperative eGFR and CKD stage changes were also similar.
  
  
  CONCLUSIONS
  Both SWL and F-URS are effective and safe techniques, which can be used for the treatment of stones in patients with solitary kidneys. However, patients treated with SWL need more sessions to achieve stone clearance.
authors.affiliation: Department of Urology, Haseki Training and Research Hospital , Istanbul, Turkey .
authors.forename: Emrah
authors.initials: E
authors.lastname: Yuruk
authors.forename: Murat
authors.initials: M
authors.lastname: Binbay
authors.forename: Faruk
authors.initials: F
authors.lastname: Ozgor
authors.forename: Levent
authors.initials: L
authors.lastname: Sekerel
authors.forename: Yalcin
authors.initials: Y
authors.lastname: Berberoglu
authors.forename: Ahmet Yaser
authors.initials: AY
authors.lastname: Muslumanoglu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016208:Databases, Factual; D005260:Female; D006801:Humans; D007668:Kidney / Q000002:abnormalities*; D007669:Kidney Calculi / Q000150:complications / Q000628:therapy*; D007682:Kidney Pelvis; D008096:Lithotripsy / Q000379:methods*; D008297:Male; D008875:Middle Aged; D051436:Renal Insufficiency, Chronic / Q000150:complications; D019233:Retreatment; D012189:Retrospective Studies; D020709:Ureteroscopes; D018666:Ureteroscopy / Q000379:methods*; D014564:Urogenital Abnormalities / Q000150:complications*; D055815:Young Adult