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Postoperative conditions
| Group A (N = 45) | Group B (N = 44) | p value | |
|---|---|---|---|
| Postoperative hospital stay (days) | 4.13 ± 0.87 | 3.14 ± 0.98 | <0.001 |
| Number of meperidine injection (time) | 1.44 ± 1.14 | 0.98 ± 1.21 | 0.064 |
| Postoperative subcutaneous emphysema | |||
| Yes | 24 | 15 | |
| No | 21 | 29 | 0.088 |
| Postoperative pneumothorax | |||
| Yes | 0 | 0 | |
| No | 45 | 44 | 1.000 |
Group A: patients with chest drain placement; Group B: patients without chest drain placement
