Clinical Study
Effectiveness of Flexible Ureterorenoscopy and Laser Lithotripsy for Multiple Unilateral Intrarenal Stones Smaller Than 2 cm
Table 1
Preoperative stone demographics.
| Total stone number | 173 | Mean stone number | 3.6 ± 3.0 (2–18) | Mean stone size (mm) | 6.6 ± 3.6 (2–17) | Mean stone burden (mm) | 22.2 ± 8.4 (12–45) | <20 mm (n = 23) | 16.1 ± 2.4 (12–19) | ≥20 mm (n = 25) | 27.8 ± 8.1 (20–45) | Localization (n) | | Upper calyx | 21 (12.1%) | Middle calyx | 42 (24.2%) | Lower calyx | 69 (40.1%) | Renal pelvis | 41 (23.6%) | Lateralization | | Right side | 23 (48%) | Left side | 25 (52%) |
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