| Group | n | Adverse reactions | Drug extravasation |
| Control group | 75 | 10 (13.33) | 8 (10.67) |
| Observation group | 75 | 2 (2.67) | 1 (1.33) |
| χ2 |
| 5.80 | 5.79 |
| P |
| 0.031 | 0.034 |