Superior laryngeal nerve in thyroid surgery

: In this paper, the authors discuss the risks of lesions to the external branch of the superior laryngeal nerve during surgical procedures on the thyroid gland. These lesions result in significant functional impairment consisting on the patients' impossibility of emitting high-pitched sounds, an easy tiredness in vocalizing, huskiness, or a combination of these symptoms. Recently, in effect, with the increasing use pre and postoperatively of newer diagnostic tools such as electromyography (EMG) of the cricothyroid muscle, a fairly high incidence of permanent or temporary, including single or bilateral lesions to this nerve was demonstrated. The necessity of using appropriate surgical techniques with the objective of avoiding or markedly reducing the incidence of lesions to the superior laryngeal nerve is discussed in detail by the authors.