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Abstract
We have developed a new procedure – endopyeloureterotomy via the transpelvic extra-ureteral approach. From September 1988 to March 1994, we have treated 72 patients with ureteropelvic junction obstruction in 73 procedures and had a success rate of 89%. Causes were primary obstruction in 60 cases, post-operative scars in four, scars from inflammation of renal calculi in four, failure of previous endopyelotomy in three and scars from tuberculosis in two. The length of the stenotic segment ranged from 0.2 to 6.5cm (mean: 1.8cm) Follow-up ranged from 6 to 69 months (mean: 24 months). It showed that 21 of 73 procedures (28.8%) had completely removed the ureteropelvic junction obstruction, 44 procedures (60.3%) had reduced the obstruction, and eight procedures had failed to bring about a decrease in obstruction. Long-term follow-up of 50 patients for 1 year or more showed that there was no recurrence of stenosis at all after the examination at 6 months after operation. Our new technique has proven etficacious in treating ureteropelvic junction obstruction.