| Group | Number | Gross hematuria | Puncture port bleeding | Dysuria |
| Control group | 57 | 7 (12.3) | 5 (8.8) | 6 (10.5) |
| Observation group | 58 | 4 (6.9) | 4 (6.9) | 8 (13.8) |
| χ2 |
| 0.963 | 0.14 | 0.287 |
| P |
| 0.326 | 0.978 | 0.592 |