200
Participants
Start Date
September 15, 2022
Primary Completion Date
October 30, 2023
Study Completion Date
November 3, 2023
tropisetron
One tropisetron was given 30 minutes in advance, and then tramadol 1.5mg/kg was intravenously injected with a micropump at a constant speed.
metoclopramide
One dose of metoclopramide was given 30 minutes in advance, and then tramadol 1.5mg/kg was injected intravenously with a micropump at a constant speed.
dexamethasone
One dose of dexamethasone was given 30 minutes in advance, and then tramadol 1.5mg/kg was injected intravenously with a micropump at a constant speed.
normal saline
Equal dose of normal saline was given 30 minutes in advance, and then tramadol 1.5mg/kg was injected intravenously with a micropump at a constant speed.
The Second Affiliated Hospital, Chongqing Medical University, Chongqing
The Second Affiliated Hospital of Chongqing Medical University
OTHER