Effect of Tramadol on Postoperative Sore Throat After General Anesthesia
Trial Parameters
Brief Summary
Post operative sore throat after general anesthesia with endotracheal intubation is a common problem causing dissatisfaction and discomfort to the patients. The investigators want to study the effect of tramadol on postoperative sore throat in general anesthesia with endotracheal intubation.
Eligibility Criteria
Inclusion Criteria: \- Female with American Society of Anesthesiologists (ASA) physical status I-II; Elective thyroidectomy(non-endoscopic) with endotracheal intubation; The patient signed the consent form. Exclusion Criteria: \- History of thyroid surgery A history of preoperative sore throat; Pregnancy; Retrosternal goiter; Thyroid tumor invading trachea need trachea reconstruction; Potentially difficult airway; Clinical diagnosis of chronic sore throat; Clinical diagnosis of psychosis; Tracheotomy after operation； Transfer to intensive care unit after operation； Contraindications to tramadol； Body mass index (BMI) \> 30kg/m\^2.