The Effect of Cuff Pressure of Laryngeal Tube on Postoperative Sore Throat after General Anesthesia Using N2O

Background: The cuff pressure (CP) of the laryngeal tube airway (LTA) increases during general anesthesia using nitrous oxide. However, there have been few studies on the relationship between CP and postoperative sore throat (POST). This study evaluated the efficacy of the CP on a POST on the recovery time and postoperative day. Methods: Forty patients were divided into two groups, group M (n = 20) and group I (n = 20). In all patients, the CP was set to 65 at the induction of anesthesia. In group M, the CP was maintained at 60-70 during general anesthesia using . However, in group I, the CP was allowed to increase. The CP was measured every 10 minutes during surgery in the two groups. The frequency and intensity (numerical rating scale of 0-100, NRS-101) of the sore throat was measured at recovery room (RR) and on postoperative day 1 (POD1). Results: There was a significant increase in the CP in group I during general anesthesia and the CP was higher in group I than in group M (P