Whilst under general anaesthetic a cystoscope is used to introduce a guide wire into the affected ureter. The cystoscope is removed and a ureteroscope is passed through the urethra and bladder into the ureter, using the guide wire as a guide. When the stone is visualised a laser fibre is introduced through the ureteroscope to touch the stone. Laser energy then fragments and vaporises the stones. Fragments can be removed by using a basket. Ureteroscopes are usually semi-rigid for use in the ureter and flexible Ureteroscopes are used to treat stones in the kidney. A ureteric stent might be inserted into the ureter at the end of the procedure, especially if there has been some trauma to the ureter, if there are stone fragments left or the flexible ureteroscope has been used.
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