Quantitative Measurement of the Glottal Area Waveform(GAW) in Unilateral Vocal Fold Paralysis

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J Korean Soc Laryngol Phoniatr Logop > Volume 9(1); 1998 > Article

Journal of The Korean Society of Laryngology, Phoniatrics and Logopedics 1998;9(1): 71-78.

편측성대마비환자에서의 성문면적파형(Glottal Area Waveform)의 정량적 측정

최홍식, 김명상, 최재영, 안성윤, 이세영, 홍정표

연세대학교 의과대학 이비인후과학교실, 음성언어의학연구소

Quantitative Measurement of the Glottal Area Waveform(GAW) in Unilateral Vocal Fold Paralysis

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ABSTRACT

Type Ⅰ thyuroplasty in conjunction with arytenoid adduction is one of the excellent techniques in the treatment of unilateral vocal fold paralysis. But perioperative objective evaluation of the patients is difficult. With the development of the videostroboscopy and image analysis program, we could quantify the Glottal Area Waveform(GAW) in patients with unilateral vocal fold paralysis and investigated the relationship between the glottal area and aerodynamic and acoustic parameters. Eight female patients who were performed type Ⅰ thyroplasty in conjunction with arytenoid adduction and 5 females with normal vocal function were involved in this study. Preoperative and postoperative videostroboscopy and vocal function study wire performed. GAW was analysed quantitatively with image analysis program (Kay Stroboscope Image analysis, KSIP) Peak Glottal Area(PGA), Baseline Offset(BO), and Closing Phase(CP) were increased in patients with unilateral vocal fold paralysis and they were reduced after the operation. Mean flow Rate (MFR) was well correlated with the PGA in normal control group and unilateral vocal fold paralysis patients. Noise to harmonic ratio(NHR) was correlated with PGA only in preoperative unilateral vocal fold paralysis patients. In conclusion quantitative measurement of the GAW is useful method in evaluation of unilateral vocal f31d paralysis patients.

KEY WORDS： Quantitative measurement;Glottal area waveform;Videostroboscopy;Vocal fold paralysis;