Clinical Research Directory

Inclusion Criteria: 1. age ≥ 18 years old; 2. undergoing hysteroscopy examination and requiring intravenous anesthesia; 3. American Society of Anesthesiologists (ASA) physical status I to II; 4. without communication difficulties, and able to cooperate with intervention implementation; 5. participating in this trial voluntarily, and signing an informed consent form; Exclusion Criteria: 1. with contraindications for hysteroscopy examination (such as cervical stenosis, difficulty in cervical dilation, reproductive tract infections such as vaginitis and cervicitis) or allergies to the intended anesthetic drugs; 2. with severe cardiac insufficiency, liver and kidney dysfunction, and other major diseases; 3. with a history of uterine surgery within the past three months; 4. body temperature above 37.5 ℃ before the anesthesia; 5. long-term use of sedative or analgesic drugs.