Attempt of quantitative evaluation of laryngeal movement before and after esophageal surgery - Attempt of quantitative evaluation of laryngeal movement before and after esophageal surgery

After esophageal cancer surgery, subjects needed to place jaws on the examination table of the equipment used in this study for measurement, but it was found that this movement was difficult and stopped. Although the research itself was discontinued, it is useful that after the operation of the esophageal cancer surgery, it was difficult for the subject to have a knowledge that even a slight movement of the jaw would be difficult, possibly causing aspiration.