Urinary calculi shall afflict people for decades. People invented many devices for treatment of calculi. Extracorporeal shock wave lithotripsy because of its relative safety, less trauma, low cost, good treatment effect, has soon become a preferred method in the treatment of urinary calculi. With the development of ESWL, variety and quality of lithotripter are improved. But some problems still exit.
History of LithotripsyUrinary calculi are one of the most common urological diseases. Not only that, it is a very old disease, and shall afflict people for decades. As a result, many thousands of years ago people had been willing to risk their lives for treatment to relieve the pain. In the absence of anesthesia, through perineum incision surgery is not only a terrible process for patients, also can leave sequela and associated with high mortality [1] . Patients required recovery time for three months or more, many of whom have erectile dysfunction, incontinence and other sequelae, and some patients even died of sepsis. Through a cannula dilating the urethra, Egyptians had smaller calculi taken out successful. Some forms of lithotripsy using a catheter can be traced back to the 9th century during Byzantine period [2] .In the 18th century, with the development of chemical technology, people have tried to dissolve calculi by chemical means, but all failed. People began to consider again with a more direct treatment of urinary calculi. The 18th century, Haller suggested that if a stone was too big to extract, it could be drilled. The lithotrites was based on Haller's view as the first basic principle. In 1824, Percy reported to the Academy of Sciences in Paris about a monk of Citreaux who crushed his bladder calculi by himself. The monks moved a metal catheter into the bladder, and then steel rod with an end cut into chisel through the catheter was moved into his bladder. A hammer hit the other end of the steel rod and calculi were cut into small pieces. The calculi finally were excreted in the urine. The monks took about a year to discharge all gravel. He is the first person who have destroyed calculi mechanically [3,4]