The Effect of Laryngeal Mask Airway on Postoperative Sore Throat in Prone Position / 대한마취과학회지

Background: Postoperative sore throat is a complaint after general anesthesia of multifactorial etiology. The laryngeal mask airway (LMA) reduces sore throat and discomfort during maintenance of the airway and make patients more comfortable. The purpose of this study was to compare effect of patient's position during operation on postoperative sore throat after the use of LMA. Methods: The fifty three patients were randomly divided into two groups. Group 1 (n=30) was underwent general anesthesia with supine position and group 2 (n=23) with prone position. After the LMA was positioned in the hypopharynx and the cuff inflated, fiberoptic laryngoscope was immediately passed down through the LMA. Number of attempts, degree of postoperative sore throat and other complications were also noted. Results: The incidence of postoperative sore throat after the use of LMA was 10% in supine position and 4% in prone position. But the difference between the groups was not statistically significant. All of the reported sore throats were rated as mild. Conclusions: Postoperative sore throat after the use of LMA is mild and the incidence is not affected by the prone position during the operation.

Differences of Incidence and Severity of Sore Throat and Hoarseness between the Methods of Airway Security / 대한구급학회지

Introduction: The sore throat and hoarseness are common complications during the postoperative period. We investigated differences of incidence and severity of sore throat and hoarseness according to methods of airway security. METHODS: One hundred twelve patients, in ASA physical status class 1~2, were included in this study (58 males and 54 females). They were divided into three groups: group 1 (n=42), intubated with endotracheal tube lubricated with normal saline; group 2 (n=40), intubated with endotracheal tube lubricated with 5% lidocaine ointment; group 3 (n=30), inserted with laryngeal mask airway (LMA) for airway security. RESULTS: The incidence of sore throat and hoarseness were 78.6% and 54.8% in group 1, 35% and 30% in group 2, and 33.3% and 20.0% in group 3. CONCLUSIONS: Both 5% lidocaine-lubricated endotracheal tube and laryngeal mask airway showed tendency of decreased incidence of postoperative sore throat and hoarseness but there are no statistical significance.

Incidence of Sore Throat after Tracheal Intubation and Postoperative / 대한마취과학회지

BACKGROUND: Sore throat is one of the most common complications of intubation. There are many factors that affect the incidence of sore throat and the succinylcholine-induced myalgia. Our study is to reveal the influences of these factors on the postoperative sore throat and the succinylcholine-induced myalgia. METHODS: One thousand and seven patients in ASA class I or II undergoing elective surgery under general anesthesia were studied, except patients undergoing brain surgery, open heart surgery, operation in oro-, naso-pharynx and larynx, and uncooperated psychiatric. We checked age, sex, patient controlled analgesia and nasogastric tube, size and kind of tube, operation position, duration of intubation and anesthetic agent. At 24~38 hours after operation, the patients were questioned about pre- and postoperative sore throat, or myalgia. RESULTS: Sore throat after endotracheal intubation developed more frequently in woman (32.8%) than man (25.9%). The older the patients, the lower the incidence of sore throat (p<0.05). The longer the anesthesia duration, the lower the incidence of sore throat (p<0.05). Succinylcholine, patient controlled analgesia, nasogastric tube, endotracheal tube, operation position, maintenance anesthetic agents and the amount of smoking did not affect the incidence of sore throat. The incidence of succinylcholine-induced myalgia was lower in elderly or patients who were administered nondepolarizing muscle relaxant. CONCLUSIONS: The incidences of sore throat and myalgia were 29% and 15%, respectively. There were significant differences in incidence of sore throat and myalgia depending on the gender, age, duration of operation, but the controllable factors which reduce the incidence of sore throat were not found. Nondepolarizing muscle relaxants could reduce the occurrence of postoperative myalgia.