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Glottal configuration in unilaterally paralyzed larynx and vocal function
Eiji Yumoto1, Tetsuji Sanuki, Ryosei Minoda
1Department of Otolaryngology - Head and Neck Surgery, Graduate School of Medicine, Kumamoto University, Kumamoto, Japan. yu6167@gpo.kumamoto-u.ac.jp
Acta Oto-Laryngologica
|November 14, 2012
Summary
A new classification system for unilateral vocal fold paralysis (UVFP) based on glottal configuration was developed using 3D CT scans. Type A configurations showed significantly better vocal function compared to Types B and C.
Area of Science:
- Laryngology
- Medical Imaging
- Vocal Cord Function
Background:
- Unilateral vocal fold paralysis (UVFP) presents diverse glottal configurations.
- Accurate classification is crucial for understanding vocal function impact.
Purpose of the Study:
- To classify glottal configurations in UVFP using 3D CT.
- To correlate these configurations with vocal function parameters.
Main Methods:
- 3D CT scans were performed on 37 UVFP patients during phonation and inhalation.
- Glottal configurations were analyzed based on vocal fold thickness and location.
- Maximum phonation time and mean airflow rate were measured.
Main Results:
- Three glottal configuration types (A, B, C) were identified.
- Type A: affected vocal fold similar thickness to healthy fold.
- Type B: thin affected fold during phonation/inhalation.
- Type C: paradoxical movement of the affected fold.
- Type A demonstrated significantly better vocal function.
Conclusions:
- A novel classification of glottal configuration in UVFP is proposed.
- This classification aids in understanding vocal fold behavior and function.
- Type A configuration is associated with superior vocal outcomes.
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