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Does Retrograde Treatment of Upper Urinary Tract Stones Necessitate Postoperative Upper Urinary Tract Drainage? Conclusions from More Than 500 Single Center Consecutive Cases.

BACKGROUND AND PURPOSE: Temporary drainage of the upper urinary tract after ureterorenoscopy for the treatment of urinary stones is almost a routine in endourologic practice. In these cases, a Double-J stent (DJS) is left for 7 or more days. In borderline cases, a ureteral catheter attached to the urethral catheter may be left for 24-48 hours. In some situations, tubeless approach is possible. The purpose of this study was to evaluate the necessity and immediate postoperative implications of upper tract drainage by comparing complications and symptoms at the immediate postoperative period in these three groups of patients.

MATERIALS AND METHODS: A database of 516 consecutive patients who underwent ureterorenoscopy for ureteral and/or renal stones between October 2014 and September 2016 was retrospectively evaluated. The cohort was divided according to postoperative drainage type of the upper urinary tract. The data consisted of demographic parameters, stone location, number and burden, severity of preoperative obstruction, and postoperative complications. Symptoms at the immediate postoperative period, assessed by visual analog scale (VAS) score, frequency, and type of analgesics used, were evaluated and compared. Categorical dependent variables were evaluated using chi-square or Spearman's correlation tests, whereas continuous dependent variables were analyzed using Pearson correlation analysis.

RESULTS: There were 196 (38%) tubeless, 214 (41%) UC, and 106 (21%) DJS cases. Patients who were drained with DJS at the end of the procedure were significantly with higher stone volume (p < 0.005), higher stone density (p < 0.005), and with more severe preoperative obstruction (p < 0.005). Postoperative complications (infection, stone-street, and acute renal failure), mean VAS score, or analgesics used were not different in the three subgroups.

CONCLUSIONS: A tubeless approach is safe in properly selected cases. There is no difference in postoperative course compared with drained groups. Tubeless procedures may facilitate an outpatient approach for treatment of upper urinary tract stones.

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