If you think that ESWL sounds painful, it might appear to be the milder alternative to ureteroscopy. This is the preferred remedy for kidney stones in the ureter. Sometimes medical professionals also refer to this as retrograde intrarenal surgery (RIRS). It involves the surgeon inserting a ureteroscope into the bladder through the urethra. The surgeon might then try to remove the stone with a unique instrument. The whole procedure is done under general anesthetic. It succeeds in the majority of cases where the stone is not larger than ½ inch.

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