Prediction of anterior commissure exposure of vocal folds prior to laryngeal microscopic surgery: Parameters reflecting occipito-atlanto-axial complex extension capacity

The purpose of this prospective study was to identify preoperative predictors of unstable exposure of vocal folds with focus on the anterior commissure (AC) prior to Laryngeal Microscopic Surgery. Patients were classified into four groups based on the degree of AC exposure during Laryngeal Microscop...

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Bibliographic Details
Published in:Auris, nasus, larynx nasus, larynx, 2020-06, Vol.47 (3), p.458-463
Main Authors: Kim, Bo Hae, Ryu, Ho Geol, Mun, Sue Jean, Lim, Yun-Sung, Shin, Jung Woo, Jung, Young Ho
Format: Article
Language:English
Subjects:
Glottis
Laryngeal suspension
Microlaryngoscopy
Vocal fold
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Summary:The purpose of this prospective study was to identify preoperative predictors of unstable exposure of vocal folds with focus on the anterior commissure (AC) prior to Laryngeal Microscopic Surgery. Patients were classified into four groups based on the degree of AC exposure during Laryngeal Microscopic Surgery, and for the analysis, these groups were subdivided into unstable exposure and stable exposure subgroups depending on whether external manipulation was required to achieve AC exposure. Correlation of the degree of AC exposure with demographics, physical measurements, and anatomical measurements taken using landmarks in simple radiograph were evaluated. Receiver operating characteristic curve analysis was used to determine optimal cutoff values to predict unstable AC exposure. Fifty-nine patients were included in the analyses. Thyroid-mandible angle (TMA) in the extended position, thyroid-mental distance (TMD) ratio, and TMA difference in the neutral and extended positions were significantly correlated with the degree of AC exposure. However, only a TMD ratio of
ISSN:0385-8146
1879-1476
DOI:10.1016/j.anl.2020.01.006