Abstract
Objective：We report treatment results on treating ureteral stones with extracorponeal shock wave lithotripsy（ESWL）one year after we used Dornier Delta II Far Sight.
Method：From July 2011 to December 2013, ESWL was performed in 292 cases（240 males and 52 females）of ureteral stones. The mean age of patients was 56 years（range：18-88）. The stones were located in the proximal ureter in 150 cases, middle in 67, and distal in 75. We divided all cases into A group（stone-free）and B group（non-stone-free）, and investigated the factors for the longer axis, minor axis, J（dosage amount of energy）, and power. We divided all cases into C group（stone-free only once）and D group（stone-free more than twice）, and investigated the factors for the longer axis, minor axis, J, and power.
Results：Treatment was performed a mean of 1.36 times. The stone-free rates were 99.0%（proximal）, 100%（middle）, and 94.7%（distal）. There were significant differences in the longer axis, minor axis, and J of proximal ureteral stones between A and B groups. There were significant differences in the minor axis of distal ureteral stones between A and B groups. There were significant differences in the longer axis and minor axis of proximal ureteral stones between C and D groups.
In conclusion, Dornier Delta II Far Sight facilitated effective treatment of ureteral stones.
