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KMID : 1036820140190030402
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Communication Sciences & Disorders
2014 Volume.19 No. 3 p.402 ~ p.411
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Phonation Characteristics of Adductor Spasmodic Dysphonia Patients before and after Botulinum Toxin-A Injection
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Kim Ji-Hyun
Kim Eun-Yeon
Jang Seung-Jin
Choi Yae-Lin
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Abstract
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Objectives: This study used objective data to look at the phonation characteristics of patients with adductor spasmodic dysphonia (ADSD) before and after receiving botulinum toxin-A (BTX-A) injections.
Methods: Twelve normal subjects, and 12 with ADSD who were divided into two groups(S1, S2) were measured with each of the 6 GRBAS scale ratings. Aerodynamic and acoustic analysis were performed.
Results: This study evaluated patients with ADSD before and after BTX-A injections and compared them with normal subjects to see the differences in the characteristics of voice Before BTX-A injections, all members of the ADSD groups had significantly lower mean airflow rate (MFR) than the normal group. Also, the S2 group had a significantly shorter maximum phonation time (MPT) than the normal group. In acoustic analysis members of the ADSD groups had significantly more jitters and shimmers than the normal group.
Conclusion: The results show that BTX-A injection is that the less severe strained-strangled voice is the more effective. And aerodynamic parameter is more sensitive barometer than acoustic parameter about the effects of BTX-A injection in ADSD. The results show that BTX-A injections can create a less severe strained voice. And the aerodynamic parameter is a more sensitive barometer than the acoustic parameter when looking at the effects of BTX-A injections in patients with ADSD.
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KEYWORD
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Adductor spasmodic dysphonia, BTX-A injection, Aerodynamic analysis, Acoustic analysis
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