Does planned intravenous sedation affect preoperative anxiety in patients?

Dental surgery generally causes stress and fear, which may affect patient physiology and increase perioperative anxiety. Dental anxiety is considered to be an important factor in determining the need for intravenous sedation. One of the gold standards for measuring preoperative anxiety is Spielberger's State-Trait Anxiety Inventory (STAI). The authors have previously assessed preoperative anxiety using STAI and recommended that intravenous sedation be performed for patients whose anxiety level is high. The intravenous cannulation necessary for sedation and sedation itself may increase anxiety. The authors carried out this study to examine whether planning intravenous sedation before surgery increases preoperative anxiety. The subjects were patients who planned to undergo wisdom teeth extraction under local anaesthesia in the authors' hospital. They were divided into two groups on the basis of the planned intravenous sedation. STAI scores were compared between the initial visit and just before surgery. There were no significant differences in the state and trait anxiety scores between the initial visit and the day of the surgery in the two groups. Planned intravenous sedation based on the evaluation of anxiety levels using STAI is effective for promoting a safe operation without aggravating preoperative anxiety.