title: Insertion of an internal-external nephroureteral stent during pediatric laparoscopic pyeloplasty: description of the technique.
abstract: OBJECTIVE
  We present a technique for inserting an internal-external nephroureteral antegrade stent during a laparoscopic pyeloplasty.
  
  
  METHODS
  We describe the step-by-step technique for external-internal stent insertion during transperitoneal laparoscopic pyeloplasty: (1) Before completion of the ueretopelvic junction anastomosis, a 14-gauge angiocatheter is inserted and the external-internal stent is advanced under direct vision downward into the ureter. (2) A percutaneous access to the intrarenal collecting system is then performed by using another 14-gauge angiocatheter. (3) Once in the pelvis, a 1.9F stone basket is passed through the angiocath and the proximal arm of the stent is brought out through skin.
  
  
  CONCLUSIONS
  The key advantage of this internal-external stent is that it can be removed in the clinic, thus not exposing the patient to another general anesthetic or cystoscopy for removal.
authors: Division of Urology, The Hospital for Sick Children, Toronto, Ontario, Canada.
authors: Alessandro
authors: A
authors: Taveres
authors: Numchai
authors: N
authors: Manaboriboon
authors: Armando J
authors: AJ
authors: Lorenzo
authors: Walid A
authors: WA
authors: Farhat
mesh_terms: D002648:Child; D002675:Child, Preschool; D006801:Humans; D007682:Kidney Pelvis / Q000601:surgery*; D010535:Laparoscopy; D009392:Nephrectomy / Q000379:methods*; D011474:Prosthesis Design; D019919:Prosthesis Implantation / Q000379:methods; D015607:Stents; D014513:Ureter