Abstract
In this paper, the postoperative function of larynxes constructed by Hyoid Transposition Laryngoplasty are reported. Thirteen of sixteen cases operated upon were evaluated for their swallowing, nasal respiration, and phonetical functions. All cases had no difficulty in their usual dietary life. although 7 cases had occasional fits of coughing when indesting fluids. Nasal respiration was possible in 3 cases, of which one had a closed tracheostoma. In 7 cases, nasal respiration was possible although could not be continued for more than a few minutes. Twelve cases were able to speak with good articulation. In one case, phonation was a little difficult because of stenosis of the new larynx. Phonetical examinations were made in 11 cases. Maximum phonation time was distributed between 2.5 seconds to 10.5 seconds. The mean exhalation rate was distributed bewween 400ml/sec and minumum. The fundamental speaking frequency was distributed between 200Hz and 60Hz. Voice intensity was distributed between 96dB SPL and 77dB SPL. From the results obtained, some improvements in surgical techniques, especially for nasal respiration, are discussed.
