In this prospective nonrandomized study the investigators are going to investigate whether auricular acupuncture with indwelling fixed needles is feasible for treatment of preoperative anxiety.

Patients, scheduled for ambulatory gynecologic surgery, will be asked, if they wish to receive auricular acupuncture (AA) against preoperative anxiety. The patients who will not wish AA, will be asked to take part in questioning (State-Trait-Anxiety-Inventory (STAI) questionnaire) and will form the control group. The preoperative anxiety using STAI, as well as the duration and quality of sleep on the night before surgery, the incidence of side effects, blood pressure and heart rate will be the outcome measures in this study.

Inclusion Criteria:

1. Patients with an American Society of Anaesthesiologists physical status of I to II scheduled for elective ambulatory gynaecological surgery under standardized general anaesthesia
2. Surgery time does not exceed 60 minutes
3. Patients without previous opioid and psychotropic medication
4. Patients aged between 19 and 55 years, able to fill in the STAI questionnaire
5. Patients who have given written informed consent

Exclusion Criteria:

1. Current psychiatric disease
2. Local skin infection at the sites of acupuncture
3. Aged < 19 or > 55 years
4. Failure to follow the standardized schema of general anaesthesia
5. Surgery time more than 60 minutes
6. Intraoperative complications (bleeding, required blood transfusion more than 6 units of packed cells, cardiovascular instability, required catecholamines)
7. Patients who consumed opioid medication at least 6 months before surgery
8. Patients who are unable to understand the consent form or to fill in the STAI questionnaire