Effect of Oral Care Solution on Sore Throat After I-Gel Laryngeal Mask General Anesthesia: A Randomized Controlled Trial.

BACKGROUND: Sore throat is a common complication after general anesthesia. Oral care solutions have been used to reduce the incidence of oral complications or ventilator-associated pneumonia, but their effect on postoperative sore throat (POST) is unclear. This study aims to investigate whether oral care solution can alleviate POST in patients undergoing i-gel laryngeal mask general anesthesia.

METHODS: A total of 120 patients who were scheduled for elective surgery under laryngeal mask general anesthesia were enrolled. The patients were randomly assigned to an experimental group (oral care solution) and a control group (0.9% saline) and gargled for 1 min with 10mL of oral care solution or saline 5 min before anesthesia induction. The primary outcomes were the overall incidence of sore throat within 24 h and incidence at 20 min, 1 h, 6 h, 24 h after removal of i-gel. The secondary outcomes were the severity of sore throat at the four time points and incidence of hoarseness, cough within 24 h after removal of i-gel.

RESULTS: A total of 111 patients were included in the analysis. The overall incidence of sore throat within 24 h in the experimental group was significantly lower than that in the control group, as was the incidence at four time points (P<0.05). The VAS scores at the four time points in the experimental group were significantly lower than those in the control group ( P <0.05), and the results of repeated measurement analysis of variance showed that time effect and intergroup effect were statistically significant ( P <0.001). No differences were found between the groups in the incidence of hoarseness and cough.

CONCLUSION: Gargling with oral care solution before anesthesia induction can significantly reduce the incidence and severity of POST in patients undergoing i-gel laryngeal mask general anesthesia.