LAUSR

INTRODUCTION AND OBJECTIVE Anderson-Hynes dismembered pyeloplasty is considered the standard surgical treatment for ureteropelvic junction obstruction (UPJO). After pyeloplasty, stent drainage remains controversial. The commonly used stents are either an internal double-J (DJ) or an externalized pyeloureteral (PU) stents. We evaluated the outcome of using DJ versus PU stents following open pyeloplasty for UPJO in children. STUDY DESIGN We retrospectively evaluated 175 patients who underwent primary open pyeloplasty in two tertiary hospitals. A total of 110 patients underwent internal DJ stent insertion (63%) while 65 patients (37%) underwent placement of external PU stent. The type of stent used at the time of surgery was according to surgeon preference and experience. Operative time, postoperative hospital stay, overall complications and success rates were compared between the two groups. RESULTS The mean age was 3.8 years, and the mean follow-up was 4 years. Mean operative time was similar in the two groups (145 min). Mean hospital stay was 3.7 and 4.2 days in DJ and PU stent, respectively (p = 0.003) Summary Table . Postoperative complication developed in 9 out of 110 patients with DJ stent (8%), while complications developed in 6 out of 65 patients with PU stent (9%) (p = 0.81). Success rate of pyeloplasty was 95.5% for DJ group versus 97% for PU group (p = 0.63). DISCUSSION Dismembered pyeloplasty remains the standard treatment of choice as a surgical management for UPJO. A debate is still there in respect to the method of PU anastomotic stenting and which stent can be used. The major advantage for external PU stents is that it can be removed safely in the outpatient clinic without any sedation preventing the risk of repeated exposure to general anesthesia. Internal DJ stent provides a shorter hospital stay and comparable complication and success rates compared with PU stent. If we manage to overcome the longer DJ stent duration and facilitate early removal by an easy mode, that does not require another anesthesia at that moment we can find the optimal stent for all pyeloplasty cases. CONCLUSIONS The two types of stents are comparable as regard overall complication and success rates after pyeloplasty. Although internal DJ stent insertion provides a relatively shorter hospital stay, a second operating room visit and anesthesia for removal remains unavoidable.