Nasal Steam Therapy for Post-extubation Respiratory Events

Inclusion Criteria: * Age of 19 to 69 years * Those who underwent surgical removal of the thyroid gland under endotracheal intubation due to a thyroid tumor * American Society of Anesthesiologists (ASA) status I or II * Those who developed upper respiratory symptoms after surgery ⑤ Voluntarily decided to participate in this clinical trial and signed the informed consent form Exclusion criteria: * Those diagnosed with symptomatic gastroesophageal reflux disease * Chronic cough lasting for more than 3 months prior to surgery, including bronchial asthma and chronic obstructive pulmonary disease (COPD) * Those who developed other respiratory infections within the past month ④ Those who are taking or are required to take other medications that may interfere with the interpretation of the treatment effect or results * Those who are scheduled to undergo additional major treatments such as reoperation, chemotherapy, and radiotherapy during the clinical trial period ⑥ Pregnant women, breastfeeding women, and those who plan to become pregnant during the study period ⑦ Others who are expected to have difficulty complying with the treatment, visits, and questionnaires stipulated in this protocol at the discretion of the medical staff