Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Results (mean ± SD)
| Variable | Butorphanol group | Meperidine group | P value |
| Operative time (min) | 46.17 ± 15.59 | 48.43 ± 10.80 | 0.515 |
| Frequent of analgesia (times) | 3.03 ± 1.67 | 1.23 ± 0.504 | < 0.001 |
| VAS (6 h after surgery) | 5.67 ± 0.88 | 5.77 ± 1.00 | 0.684 |
| VAS (before analgesia) | 8.17 ± 1.66 | 8.31 ± 1.36 | 0.719 |
| VAS (after analgesia) | 5.93 ± 1.41 | 5.52 ± 1.12 | 0.216 |
| VAS (the next morning) | 6.13 ± 1.47 | 5.93 ± 1.14 | 0.560 |
| Hospital stay (d) | 3.63 ± 0.69 | 3.73 ± 0.74 | 0.585 |
