| Number | Percentage |
Duration of more than 120 minutes | 11 | 36.66 |
Delayed recovery | 4 | 13.34 |
Intraoperative bradycardia | 2 | 6.66 |
Intraoperative arterial hypotension | 2 | 6.66 |
Intraoperative hypoxemia | 3 | 10 |
Unknown | 8 | 26.67 |
Total | 30 | 100 |