| Non-Visible Stone | ESWL | URS | Total |
| IV contrast injection | 176 | 0 | 176 |
| 100.0% | 0.0% | 100.0% | |
| Contrast injection through the ureteric catheter | 1 | 36 | 37 |
| 2.7% | 97.3% | 100.0% | |
| Passage of Ureteric Catheter only | 11 | 24 | 35 |
| 31.4% | 68.6% | 100.0% | |
| Failure of localization | 19 | 1 | 20 |
| 95.0% | 5.0% | 100.0% | |
| Total | 849 84.1% | 160 | 1010 |
| 15.8% | 100.0% |