The purpose of this paper is to present our experience with real-time compu
ted tomography (CT) fluoroscopy guided percutaneous nephrostomy (PNT) and t
o describe this technique involving puncture under laser guidance. We attem
pted 30 placements in 25 patients: puncture was directed by laser guidance
and placement of the tube was made under real time CT fluoroscopy, 25 proce
dures were performed in prone position and 5 procedures in the supine posit
ion. The time necessary for the procedure ranged from 10 to 45 min (mean 25
min). The average duration of CT fluoroscopy per placement was 49 seconds
(range 7-120 s). The PNT placement was successful as a sole procedure inclu
ding puncture and catheter placement in 24 of 30 cases in the remainder of
cases, puncture was performed under CT guidance but the catheter was defini
tively positioned in conventional fluoroscopy. The CT fluoroscopy technique
allows routine, efficient and safe PNT placement, especially when encounte
ring difficult access to the pelvicaliceal system.