Table 2.
Stone and operative factors
| Variable | Participants (n = 424) |
|---|---|
| Side of treatment: right | 180 (47%) |
| Mean size of dominant treated renal stone, mm | 7.2 (3.8) |
| Mean size of dominant treated ureteral stone, mm | 7.4 (3.1) |
| Dominant stone location* | |
| Renal | 212 (50%) |
| Proximal ureter | 100 (24%) |
| Distal ureter | 103 (24%) |
| Median number of renal stones treated (quartiles) | 3 (2, 4) |
| Operative time, min | 57 (30) |
| Ureteroscopy time, min | 40 (25) |
| Ureteroscope type* | |
| Flexible | 266 (68%) |
| Semirigid | 57 (15%) |
| Both | 71 (18%) |
| Ureteral access sheath use | 197 (47%) |
| Basket extraction | 287 (68%) |
| No. of scope/basket passes | |
| 1–4 | 145 (39%) |
| 5–20 | 152 (41%) |
| >20 | 72 (20%) |
| Irrigation method | |
| Manual | 188 (45%) |
| Constant pressure | 205 (49%) |
| Ureteral stent diameter | |
| 4.7 French | 47 (12%) |
| 6 French | 349 (87%) |
| Ureteral stent length, cm | |
| 22 | 11 (3%) |
| 24 | 127 (32%) |
| 26 | 159 (40%) |
| 28 | 90 (22%) |
| 30 | 13 (3%) |
| Proximal stent curl: complete | 348 (82%) |
| Proximal stent curl location | |
| Renal pelvis | 249 (63%) |
| Calyx | 145 (37%) |
| Stent dwell time, days | 9 (8) |
| Median (quartiles) | 7 (5, 11) |
*
Note: percentages may not sum to 100 due to rounding.
Data shown are n (%) or mean (SD), except where indicated.