Abstract：
OBJECTIVE:To determine the effect of preoperative ureteral stenting on success rates of ureteroscopy (URS) for nephroureterolithiasis. MATERIALS AND METHODS:We retrospectively evaluated patients who underwent URS for nephroureterolithiasis without preoperative indwelling ureteral stents. These patients were matched according to age, sex, body mass index, and stone side, size, site, and number of stones per patient, with patients who had been prestented before URS. Patient data, stone-free rates (SFRs), and complications were compared. RESULTS:The study included 286 patients (143 stented vs 143 nonstented). The mean stone size was 5.69 ± 3 mm. The mean number of stones per patient was 1.35 ± 0.7. The overall SFR after 1 URS procedure was 90.9% and higher in prestented than in nonstented patients (95.1% vs 86.7%, P ≤ .013). For ureteral stones, the SFR was 99% in prestented and 90% in nonstented patients (P ≤ .0048). The SFR did not differ between the groups for ureteral stones <5 mm, but was higher in prestented than in nonstented patients for ureteral calculi ≥ 5 mm (98.2% vs 83.3%, P ≤ .0105). For urinary calculi ≥ 5 mm, the overall SFR was higher in prestented than in nonstented patients (93.3 vs 78.3%, P ≤ .0054). Perioperative complications occurred in 27 patients (9.4%; Clavien I, 6.6%; Clavien IIIb, 2.8%) without differences between the groups. CONCLUSION:URS is a safe and efficacious procedure for the treatment of nephroureterolithiasis. Preoperative ureteral stent placement is associated with higher SFRs compared with nonstented patients for urinary calculi ≥ 5 mm. Nonstented patients with urinary calculi ≥ 5 mm should be informed about the risk for a second-look URS procedure.
journal_name
Urologyjournal_title
Urologyauthors
Netsch C,Knipper S,Bach T,Herrmann TR,Gross AJdoi
10.1016/j.urology.2012.06.064subject
Has Abstractpub_date
2012-12-01 00:00:00pages
1214-9issue
6eissn
0090-4295issn
1527-9995pii
S0090-4295(12)00938-7journal_volume
80pub_type
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