title: Initial report of microperc in the treatment of pediatric nephrolithiasis.
abstract: OBJECTIVE
  To report the first technical feasibility and safety of microperc in the treatment of pediatric nephrolithiasis.
  
  
  METHODS
  A multicenter prospective trial was initiated and microperc was performed in 19 children from four different centers. In all cases, 4.85-Fr all-seeing needle was used to access the collecting system under direct vision. Stone fragmentation was performed using a 200-μm holmium: YAG laser fiber either through the same needle sheath or an 8-Fr microsheath. Patient- and procedure-related factors and perioperative and postoperative parameters were analyzed.
  
  
  RESULTS
  The mean age of the children was 7.5 ± 4.4 years. Mean stone size was 14.8 ± 6.8mm. Conversion to Mini-PNL was required in two patients because of optical default in one and the high stone burden in the other. The mean hospital stay was 1.8 ± 0.8 days and the mean hemoglobin decrease was 0.1 mg/dl. The overall stone-free rate at 1 month was 89.5%. In one patient with obstructed ureteropelvic junction, intravasation of the irrigation fluid has led to abdominal distention and managed with percutaneous drainage intraoperatively. No other postoperative complication was recorded and no ancillary procedure was required.
  
  
  CONCLUSIONS
  Microperc is a safe and effective procedure in the treatment of pediatric kidney stones.
authors.affiliation: Faculty of Medicine, Department of Urology, Bezmialem Vakif University, Istanbul, Turkey. selcuksilay@gmail.com
authors.forename: Mesrur Selcuk
authors.initials: MS
authors.lastname: Silay
authors.forename: Abdulkadir
authors.initials: A
authors.lastname: Tepeler
authors.forename: Gokhan
authors.initials: G
authors.lastname: Atis
authors.forename: Ahmet Ali
authors.initials: AA
authors.lastname: Sancaktutar
authors.forename: Mesut
authors.initials: M
authors.lastname: Piskin
authors.forename: Cenk
authors.initials: C
authors.lastname: Gurbuz
authors.forename: Necmettin
authors.initials: N
authors.lastname: Penbegul
authors.forename: Ahmet
authors.initials: A
authors.lastname: Ozturk
authors.forename: Turhan
authors.initials: T
authors.lastname: Caskurlu
authors.forename: Abdullah
authors.initials: A
authors.lastname: Armagan
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004867:Equipment Design; D005260:Female; D006801:Humans; D007223:Infant; D007669:Kidney Calculi / Q000601:surgery*; D008297:Male; D009339:Needles; D053040:Nephrolithiasis / Q000601:surgery; D011446:Prospective Studies; D013520:Urologic Surgical Procedures / Q000295:instrumentation / Q000379:methods
keywords: Children; Microperc; Nephrolithiasis