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J Korean Soc Laryngol Phoniatr Logop > Volume 7(1); 1996 > Article
Journal of The Korean Society of Laryngology, Phoniatrics and Logopedics 1996;7(1): 56-60.
Evaluation of Vocal Efficiency for the Polyps and Nodules
Yong-Da Jin1, Hwa-Young Pyo2, Hong-Shik Choi2
1Department of ENT, Yian Bian Medical College
2The Institute of Logopedics and Phoniatrics, Yonsei University College of Medicine
ABSTRACT
The vocal efficiency(VE) can be calculated as the ratio of acoustic power to aerodynamic power. It relates to the vocal intensity, air Sow rate and subglottic pressure. In this study, we treated 20 cases of vocal polyps and 10 cases of vocal nodules by way of laryngo-microsurgery or laser laryngo-microsurgery. The VE was measured preoperatively and postoperatively in all cases. The results showed that there was a significant improvement of VE postoperatively than that of preoperative measurement(p<0.01) in vocal Polyp group. However, there was no significant difference(p>0.05) in vocal nodule group. Through comparing the results, we obtained the conclusion : The laryngo-microsurgery is the reliable method of management for the vocal polyps, but f3r the vocal nodules, the laryngo-microsurgery should be selected after other more conservative approaches fail to produce the desired results.
KEY WORDS: Vocal efficiency;Vocal polyp;Vocal nodule;
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