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Comparison of intraoperative adverse reactions in the two study groups (n (%) cases).
| Groups | Low blood pressure | Bradycardia | Decreased oxygen saturation | Transient local pain at the injection site | Respiratory depression | Total incidence |
|---|---|---|---|---|---|---|
| The observation group (n = 53) | 0 (0.00) | 1 (1.89) | 0 (0.00) | 0 (0.00) | 1 (1.89) | 2 (3.77) |
| The control group (n = 53) | 4 (7.55) | 7 (13.21) | 4 (7.55) | 13 (24.53) | 8 (15.09) | 36 (67.92) |
| χ 2 | 4.157 | 4.867 | 4.157 | 14.817 | 5.950 | 47.421 |
| P | 0.041 | 0.027 | 0.041 | <0.001 | 0.015 | <0.001 |
