Abstract
Partial thyrotomy, developed by author, has not jeopardized phonation, but afforded adequate and satisfactory operative vision of the pharynx.
Thyrotomy (laryngofissure), currently in use, often results in web formatiin at the anterior commissure and often causes hoarseness. Dr. Hayashi intended to prevent this web formation by making incision only at lower half of the thyroid cartlage. But the devision was not adequated and intraphayngeal operation was difficult.
With Huet and Thomson's extended thyrotomy in mind, the author introduced new approach partial thyrotomy. Its operative technique is as follows; first anterior lower portion of the thyroid cartilage is incised being carefule not to damage the M. crico-thyroideus, then mucosallining
