Extracorporeal shock wave lithotripsy (ESWL) is a golden standard to treatment of symptomatic urinary calculi. Many experiences treated with ESWL has been preported in worldwide literatures. But there are a little reports which analyze factors
influencing on successful stone fragmentation with ESWL.
We reviewed 136 patients with pimary ureteral calculi treated with the third generation lithotripter, Modulith SL-20, to analyze the factors influencing on stone fragmentation and to determine the limit of repeated ESWL.
@ES The resuslts were as follows:
@EN 1. The cumulative successful rates of the first, second, third, 4th and 8th session were 72%, 90%, 96%, 98% and 98%, respectively. Any7 successful stone fragmentation is not seen after the 5 th session.
2. The more the size of calculi increase, the more the numbers of repeated ESWL are increased (p=0.001).
3. Tkhe number of repeated ESWL for successful fragmentation increase in radio-opaque calculi than slightly opaque calculi (p=0.001).
4. The location of calculi is not correlated to the numbers of repeated ESWL for successful fragmentation (p=0.09).
5. The degree of ureteral obstruction is not dcorrelated to the numbers of repeated lithotrijpsies for successful fragmentation (p=0.28).
In could be concluded that the size and radio-opacity of calculi are well correlated to the numbers of repeated lithotrypsies for successful fragmentation, whereas the location and the degree of ureteral obstruction are not.
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