<qa>  What is the name of the operation that is commonly performed in Khonkaen University?Thyroidectomy is an operation that is commonly performed. In Department of Otolaryngology, Khonkaen University was performed this operation about 200 cases per years. After an operation a pressure dressing by Hypafix is usually used due to the belief that it will help to reduce complications such as post-operative bleeding or haematoma. However, the practice is uncomfortable to patients and makes it hard to detect early haematomas. 