Background: To report a series of children with pelviureteric junction obstruction (PUJO) due to lower polar crossing vessels who underwent laparoscopic vascular transposition. In order to confirm the relief of the obstruction and avoid unnecessary additional procedures, we suggest performing an intraoperative measure of the ureteral opening pressure.
Patients And Methods: From January 2007 and January 2014, 11 children underwent laparoscopy to treat well-documented PUJO by polar vessels. In the first 7 cases, children underwent a careful dissection of the polar vessels that were transposed cranially in the pelvis. In the last 4 cases, a percutaneous needle was inserted into the renal pelvis, and the ureteral opening pressure was obtained intraoperatively, before and after the vascular hitch procedure, in 3 cases. No vascular relocation was necessary except in 1 case with a polar vessel unrelated to the obstruction.
Results: The laparoscopic procedure was feasible in all cases. Median operative time was 90 minutes without intraoperative complications. In the last 3 cases, a decrease in the renal pelvic pressure was demonstrated just after releasing the ureter from the polar vessels, confirming the extrinsic obstruction. In 1 case, the intraoperative pelvic pressure measurement showed that there was no vascular compression but that obstruction was due to renal rotation. During follow-up (range, 12-96 months) all patients reported resolution of their symptoms, nine children showed a decrease in the hydronephrosis grade, and all but one with poor function had improved drainage on diuretic renography.
Conclusions: Intraoperative measurement of ureteral opening pressure may help to confirm that the vascular hitch procedure has relieved the pelvic obstruction, precluding the need for dismembered procedures. We believe that in some doubtful cases, with the addition of intraoperative pelvic pressure measurement, vascular hitch may be considered a safe procedure to treat selected cases of PUJO in children.
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