Effect of Dexmedetomidine Combined With Low-dose Nalmefene on Preventing Remifentanil-induced Postoperative Hyperalgesia
Pain, Anesthesia
About this trial
This is an interventional prevention trial for Pain focused on measuring Remifentanil, Opioid-induced hyperalgesia, Postoperative pain, pain intensity
Eligibility Criteria
Inclusion Criteria:
- Patients are scheduled to undergo Gynecological surgery under a short general anesthesia of 1-3 hours.
- American Society of Anesthesiologists physical status is I-II.
- Written informed consent was obtained from all the subjects.
Exclusion Criteria:
- Subject has a diagnosis of Coronary heart disease, bronchial asthma, cardiac, lung, hepatic and renal insufficiency.
- Subject has a diagnosis of Severe high blood pressure , diabetes, obesity (BMI>30).
- Subject has a history of chronic pain, a history of alcohol or opioid abuse, pre-existing therapy with opioids, intake of any analgesic drug within 48 h before surgery.
- .Subject has Pregnancy, psychiatric disease.
- Subject has any contraindication for the use of patient-controlled analgesia (PCA).
- Inability to understand the Study Information Sheet and provide a written consent to take part in the study.
Sites / Locations
- Tianjin Medical University General Hospital
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Arm 5
Placebo Comparator
Sham Comparator
Active Comparator
Active Comparator
Active Comparator
Normal Saline
Sufentanil
Dexmedetomidine
Nalmefene
Dexmedetomidine-Nalmefene
Normal saline is intravenously administrated before anesthesia induction and intraoperative pain management was with remifentanil
Normal saline is intravenously admistrated before anesthesia induction and intraoperative pain management was with sufentanil
Dexmedetomidine is intravenously administrated at a dose of 0.5ug/kg 10min before anesthesia induction and intraoperative pain management was with remifentanil
Nalmefene is intravenously administrated at a dose of 0.2ug/kg before anesthesia induction and intraoperative pain management was with remifentanil
A dose of 0.1ug/kg nalmefene and a dose of 0.25ug/kg dexmedetomidine for 10 minutes before anesthesia induction and intraoperative pain management was with remifentanil