title: Feasibility of single-session endoscopic combined intrarenal surgery for ipsilateral large renal stones and retrograde intrarenal surgery for contralateral renal stones: Initial experience.
abstract: To analyze the feasibility of carrying out endoscopic combined intrarenal surgery with supine miniaturized percutaneous nephrolithotomy and retrograde intrarenal surgery for patients with bilateral stones in a single session.
  
  
  
  The records of consecutive patients presenting with bilateral kidney stones who underwent endoscopic combined intrarenal surgery with miniaturized percutaneous nephrolithotomy (15-Fr miniaturized nephroscope) and retrograde intrarenal surgery on one side, and retrograde intrarenal surgery on the contralateral side were prospectively collected and analyzed. After the miniaturized percutaneous nephrolithotomy procedure, flexible uretero-renoscopy was carried out for active removal of the stone fragments. Subsequently, retrograde intrarenal surgery was carried out on the contralateral side.
  
  
  
  Overall, 26 patients were included in the analysis. The stone-free rate of the initial endoscopic combined intrarenal surgery side was 76.9% (20/26), and the stone-free rate of the contralateral retrograde intrarenal surgery side was 92.3% (24/26). Complications occurred in two patients (postoperative bleeding and urinary tract infection); however, these conditions were completely resolved with appropriate medications within 2 weeks postoperatively. Univariate logistic regression analyses showed that accumulation of surgical experience (OR 117.3, P = 0.046) was a significant predictor for stone-free status.
  
  
  
  Carrying out endoscopic combined intrarenal surgery and contralateral retrograde intrarenal surgery in a single session for patients with bilateral stones is feasible and safe.
authors.affiliation: Department of Urology, Hallym University Kangnam Sacred Heart Hospital, Seoul, Korea.
authors.forename: Ohseong
authors.initials: O
authors.lastname: Kwon
authors.affiliation: Department of Urology, SMG-SNU Boramae Medical Center, Seoul, Korea.
authors.forename: Juhyun
authors.initials: J
authors.lastname: Park
authors.affiliation: Department of Urology, SMG-SNU Boramae Medical Center, Seoul, Korea.
authors.forename: Min Chul
authors.initials: MC
authors.lastname: Cho
authors.affiliation: Department of Urology, SMG-SNU Boramae Medical Center, Seoul, Korea.
authors.forename: Hwancheol
authors.initials: H
authors.lastname: Son
authors.affiliation: Department of Urology, SMG-SNU Boramae Medical Center, Seoul, Korea.
authors.forename: Hyeon
authors.initials: H
authors.lastname: Jeong
authors.affiliation: Department of Urology, SMG-SNU Boramae Medical Center, Seoul, Korea.
authors.forename: Sung Yong
authors.initials: SY
authors.lastname: Cho
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003131:Combined Modality Therapy; D019723:Endoscopes; D004724:Endoscopy / Q000295:instrumentation / Q000379:methods*; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging / Q000601:surgery; D007669:Kidney Calculi / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D000074642:Nephrolithotomy, Percutaneous / Q000295:instrumentation / Q000379:methods*; D011183:Postoperative Complications; D011184:Postoperative Period; D016896:Treatment Outcome
keywords: kidney calculi; nephrolithiasis; ureterorenoscopes; urinary calculi