Ear surgeries include tympanoplasty, ear canal surgery, and mastoidectomy.
Conditions
Interventions
Group C:Lying flat position, pump in the same dose of normal saline.
Group B:10° reverse Trendelenburg position
Pump in the same dose of normal saline
Group A:10° reverse Trendelenburg position
Pump in a small dose of norepinephrine at 0.01 to 0.04 µg/kg/min.
Sponsors
Shandong Second Provincial General Hospital, Shandong Provincial ENT Hospital
Eligibility
Sex/Gender
All
Age
18 Years to 60 Years
Inclusion criteria
Inclusion criteria: 1. Age between 18 and 60 years; 2. American Society of Anesthesiologists (ASA) classification I–III; 3. Elective ear surgery scheduled with an operation time of 1 to 3 hours; 4. General anesthesia planned; 5. Signed informed consent obtained and cooperation in data collection ensured.
Exclusion criteria
Exclusion criteria: 1.The operation time is either less than 1 hour or more than 3 hours. 2. Preoperative uncontrolled hypertension (SBP>180mmHg) or arrhythmia; 3. History of cerebral infarction; (4) Poorly controlled hypertension and severe heart disease; 4. Poorly controlled hypertension and severe heart disease; 5. BMI >= 30 kg/m²; 6. History of chronic pain or opioid medication; 7. Any other factors preventing cooperation with the research, such as language comprehension disorders.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Quality score of the technical field.; | — |
Secondary
| Measure | Time frame |
|---|---|
| Postoperative adverse reactions included nausea, vomiting, and dizziness.;Record HR, MAP, and BIS ;Record vasoactive drug administration, including norepinephrine, urapidil, and esmolol, during the operation.; | — |
Countries
China
Contacts
Public ContactLiu Yue
Shandong Second Provincial General Hospital, Shandong Provincial ENT Hospital
Outcome results
None listed