| Hydromorphone group (n = 36) | Nalbuphine group (n = 36) | P |
---|
Dizziness | 18 | 5 | 0.002 |
No dizziness | 18 | 31 |
Nausea | 16 | 1 |  < 0.001 |
No nausea | 20 | 35 |
Abdominal pain | 26 | 32 | 0.135 |
No abdominal pain | 10 | 4 |
- T1, before induction; T2, 2Â min after induction; T3, at admission; T4, after reaching the splenic flexure; T5, after reaching the hepatic flexure; T6, upon arrival at the ileocecal area; T7, during endoscopic withdrawal