Journal article
Differentiating arytenoid dislocation and recurrent laryngeal nerve paralysis by arytenoid movement in laryngoscopic video
Otolaryngology-head and neck surgery, Vol.149(3), pp.451-456
09/2013
DOI: 10.1177/0194599813491222
PMCID: PMC3770460
PMID: 23719396
Abstract
To present a new method of quantifying arytenoid movement during inspiration and determine if it can be used to distinguish arytenoid dislocation from vocal fold paralysis.
Case series with chart review.
Retrospective study conducted in a university laboratory based on university hospital data.
Endoscopic videos from 8 patients with dislocation and 5 patients with vocal fold paralysis diagnosed by electromyography were included. Vector analysis measured cuneiform movement, an indirect measurement of arytenoid movement, during 1 inspiration. Measurements normalized and not normalized to vocal fold length were evaluated. Interrater reliability (2 raters) and intrarater reliability (1 rater performing the analysis twice) were evaluated using intraclass correlation coefficient (ICC) analysis. Raters were blinded to subject group during analysis.
Pixel-valued cuneiform movement was 81.16 ± 25.62 for dislocation and 30.22 ± 23.60 for paralysis (P = .019). Unitless cuneiform movement was 0.58 ± 0.17 for dislocation and 0.24 ± 0.18 for paralysis (P = .030). Interrater ICC was 0.942 for pixel-valued measurements and 0.962 for unitless measurements. Intrarater ICC was 0.909 for pixel-valued measurements and 0.881 for unitless measurements.
Both pixel-valued and unitless measures of arytenoid movement were significantly greater in arytenoid dislocation than vocal fold paralysis. Pixel-valued measurements were included to demonstrate the ability to make quantitative comparisons across subjects without precise knowledge of camera precision, provided position is approximately stable, as each measurement is inherently normalized by vocal tract length. Future studies will apply this new method of evaluating vocal fold immobility disorders on a larger scale and incorporate a more diverse group of etiologies.
Details
- Title: Subtitle
- Differentiating arytenoid dislocation and recurrent laryngeal nerve paralysis by arytenoid movement in laryngoscopic video
- Creators
- Peiyun Zhuang - Zhongshan Hospital of Xiamen UniversitySteven Nemcek - University of Wisconsin–MadisonKetan Surender - University of Wisconsin–MadisonMatthew R HoffmanFan Zhang - 3Fudan University Shanghai EENT Hospital, ENT Department, Shanghai, ChinaWilliam J Chapin - University of Wisconsin–MadisonJack J Jiang - University of Wisconsin–Madison
- Resource Type
- Journal article
- Publication Details
- Otolaryngology-head and neck surgery, Vol.149(3), pp.451-456
- DOI
- 10.1177/0194599813491222
- PMID
- 23719396
- PMCID
- PMC3770460
- ISSN
- 0194-5998
- eISSN
- 1097-6817
- Grant note
- R01 DC008153 / NIDCD NIH HHS F31 DC012495 / NIDCD NIH HHS
- Language
- English
- Date published
- 09/2013
- Academic Unit
- Otolaryngology
- Record Identifier
- 9984366375802771
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