Background
Meanwhile, postoperative sore throat, supraglottis, iSLN block, SAD
I-gel is a supraglottic airway device (SAD) widely used for airway management during general anesthesia. Meanwhile, postoperative sore throat (POST) is one of the frequent complaints among patients using SAD. Although most of POST is typically self-limiting, it is rated as the eighth most undesirable outcome in the postoperative period [Internal branch of the superior laryngeal nerve (iSLN) predominantly supplies supraglottis and pharyngeal mucosa. There is increasing recognition that the iSLN is superficially positioned and therefore easily blocked in daily clinical practice. Prior research revealed that iSLN block could effectively alleviate POST after endotracheal tubes (ETT) [This prospective randomized clinical trial was performed to investigate the efficacy and safety of iSLN block in relieving POST after SAD insertion in elective gynecologic surgery. Furthermore, we also attempted to explore and identify the risk factors for POST, to provide a better understanding of prediction, in order to allow individualized management after supraglottic airway device insertion in the future.