Laser-assisted fluoroscopic puncture:: A new technique for accessing the kidney

Purpose: We developed a laser pointer device that is mounted on the image intensifier of a C-arm fluoroscope. The laser-assisted fluoroscopic puncture technique (LAFPT) is an alternative method of accessing the kidney. Materials and Methods: The LAFPT was assessed both in an in vitro model and in a series of cases. The in vitro model was composed of Foley balloons filled with contrast medium of different volumes (2-6 mL) embedded in silicone pads. The total fluoroscopy times and attempts required for a successful puncture with LAFPT were compared with those of conventional fluoroscopic access. Results: The number of attempts required to puncture the 2-mL balloons was significantly greater with the conventional fluoroscopic technique than with LAFPT. The fluoroscopy time in vitro was reduced 50% with LAFPT. However, there was no statistically significant difference in the time required for the two techniques in the clinical series. Conclusion: The laser-assisted fluoroscopic puncture technique allows accurate positioning of a needle with reduced radiation exposure.