A surgical tie, also known as a LIGATURE, is a type of medical device used to secure tissue or vessels during surgery. It is typically made of a strong, flexible material such as nylon, and is used to tie off blood vessels or other structures in order to prevent bleeding. The tie is usually applied with a special instrument called a hemostat, which is used to clamp the tissue and then tie it off. Surgical ties are an important part of many surgical procedures, and can help to ensure that the patient receives the best possible outcome.