2Scarpa RM, De Lisa A, Porru D, et al. Holmium:YAG laser ureterolithotripsy[ J ]. Eur Urol, 1999,35 (3) :233-238.
3Zorcher T, Hochberger J, SchroR KM, et al. In vitro study conceming the efficiency of the frequency-doubled double- pulse Neodymium:YAG laser (FREDDY) for lithotripsy of calculi in the urinary tract[J]. Lasers Surg Med, 1999, 25(1):38-42.
4Brandt H, Rathert P. Endoscopic urinary stone lithotripsy with the U-100 laser [ FREDDY Technology] f'wst clinical trials on 104 patients[C]. 48th annual meeting of urology in north Rhine Westphalia Germany-Cologne, 2002. 18-20.
5Zorcher T,Hochberger J, Schrott KM, et al. In vitro study concerning the efficiency of the Frequency-Doubled Double-pulse Neodymium: YAG Laser(FREDDY) for lithotripsy of calculi in urinary tract . Lasers Surg Med, 1999,25:38.
2Ebert A. Stangl J, Kuhn R, et al. The frequency-doubled double-pulse Neodym: YAG laser lithotripter(FREDDY) in lithotripsy of urinary stones [J]. Urology A, 2003, 42(6): 825-833.
