title: Per urethra insertion of a through-and-through safety guide wire using a dual-lumen ureteral catheter during percutaneous nephrolithotripsy.
abstract: BACKGROUND
  The second ("safety") of two guide wires is commonly inserted antegradely in percutaneous nephrolithotripsy (PCNL). We describe the retrograde insertion of a through-and-through safety guide wire during PCNL.
  
  
  METHODS
  After inserting a percutaneous nephrostomy 1 day earlier, a guide wire was introduced through the nephrostomy tube to the bladder and pulled out through the urethral meatus via a cystoscope and grasper. The tube was removed, leaving the wire positioned from the flank to the meatus. A dual-lumen catheter was introduced retrogradely through the urethra over the wire, up to the nephrostomy incision. The safety guide wire was introduced retrogradely through the catheter's other port.
  
  
  RESULTS
  This procedure succeeded in 9 of 10 patients: the exception was very obese and the catheter was too short to reach the incision in the flank.
  
  
  CONCLUSIONS
  Using a dual-lumen catheter allows quick and simple retrograde insertion of a safety guide wire during PCNL.
authors.affiliation: Department of Urology, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel. surge04@post.tau.ac.il
authors.forename: A
authors.initials: A
authors.lastname: Greenstein
authors.forename: M
authors.initials: M
authors.lastname: Sofer
authors.forename: N J
authors.initials: NJ
authors.lastname: Mabjeesh
authors.forename: I
authors.initials: I
authors.lastname: Kaver
authors.forename: H
authors.initials: H
authors.lastname: Matzkin
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D009403:Nephrostomy, Percutaneous / Q000295:instrumentation* / Q000379:methods; D014513:Ureter; D014521:Urethra; D014546:Urinary Catheterization