| 分组 | 喉头水肿 | 气胸 | 出血 | 感染 | 窒息 | 支气管痉挛 |
| 非VBN组 | 3/47 (6.38%) | 5/47 (10.64%) | 6/47 (12.77%) | 8/47 (17.02%) | 2/47 (4.26%) | 2/47 (4.26%) |
| VBN组 | 1/42 (2.38%) | 2/42 (4.76%) | 2/42 (4.76%) | 2/42 (4.76%) | 1/42 (2.38%) | 1/42 (2.38%) |
| c2值 | 0.543 |
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| P值 | <0.05 |
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