일측성 성대마비와 성대구증의 성문면적파형과 발성 특성 비교

Abstract

Background & Objectives : Despite of their histopathological differences, unilateral vocal fold palsy (UYFP) and sulcus vocalis (SV) manifest similar vocal characteristics. This srudy investigated differences in the characteristics of gloual area waveform (GAW) and phonation in patients with UVFP or SV. Method:j: Subjects for the srudy consisted of20 individuals with normal vocal status (NL), 20 patients with UVFP, and 21 patients with SV. Aerodynamic and acoustic analyses and GA \V measurement were performed. Re:ju/I:j: Comparing with the NL group; (1) the two pati ent groups (UVFP and SV) had significandy larger mean air flow ra te; (2) the UVFP group had a s ignificandy larger phonation quotient; and (3) the SV group had a significa ndy lower vocal efficiency. Also comparing with the NL group, the two patienl groups showed in Ia! vowel prolongation task; (1) signi ficandy shorter maximum phonation time; (2) higher jitter, shimmer, noise-to-harmonic ratio, and re lative average perturbation; (3) larger frequency distribut ion mean, ampli tude quotient distribution mean, closed quotient distribution mean, pitch crossplot with irregu larity score, and amplitude crossplot with irregu larity score in a reading passage task; and (4) smaller closed quotient . The SV group had a significantly wider normalized baseline offSet than the other two groups. Gross closing rate was the s lowest in the UYFP group. Diclusion & Conclusion: Quantitative measurement of GA W may be a usefu l method to evaluate patients with glottic incompetence. Additiona lly, jitter and relative average perturbation might be important diagnostic parameters in patients with mild to moderate UVFP or SV.