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Arytenoid asymmetry: Is it the most predictive parameter for arytenoid adduction in unilateral vocal fold paralysis?
J Laryngol Otol. 2021 Feb; 135(2):159-167.JL

Abstract

OBJECTIVE

The aim of this study was to establish arytenoid asymmetry as a pre-operative predictive parameter for arytenoid adduction surgery in unilateral vocal fold paralysis and thereafter identify the most predictive parameter for arytenoid adduction among the established parameters.

METHODS

A retrospective comparative study was undertaken. The 'arytenoid asymmetry angle' formed between skewed 'glottic' and 'interarytenoid' axes (traced along the plane of closure of the membranous and cartilaginous glottis, respectively) was quantified in pre-operative laryngoscopic images of 85 adults with unilateral vocal fold paralysis who underwent either type 1 thyroplasty (group 1) or type 1 thyroplasty with arytenoid adduction (group 2). The need for arytenoid adduction was determined intra-operatively based on subjective voice improvement and laryngoscopic results.

RESULTS

Arytenoid asymmetry (p < 0.0001), posterior phonatory gap (p = 0.001) and vertical level difference (p = 0.004) were significantly greater in group 2 (descending order of parameters). Arytenoid asymmetry angle showed a significant positive correlation with the latter two parameters.

CONCLUSION

Arytenoid asymmetry is the most predictive parameter for arytenoid adduction. An arytenoid asymmetry angle of more than or equal to 33.9⁰ is an indication for arytenoid adduction. This aids in pre-operative planning of arytenoid adduction.

Authors+Show Affiliations

Department of Laryngology, Dr Jayakumar's Institute of Laryngology, Trivandrum, India.Department of Laryngology, Dr Jayakumar's Institute of Laryngology, Trivandrum, India.Department of Laryngology, Dr Jayakumar's Institute of Laryngology, Trivandrum, India.

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

33593469

Citation

Menon, J R., et al. "Arytenoid Asymmetry: Is It the Most Predictive Parameter for Arytenoid Adduction in Unilateral Vocal Fold Paralysis?" The Journal of Laryngology and Otology, vol. 135, no. 2, 2021, pp. 159-167.
Menon JR, Mathew AS, Nath S. Arytenoid asymmetry: Is it the most predictive parameter for arytenoid adduction in unilateral vocal fold paralysis? J Laryngol Otol. 2021;135(2):159-167.
Menon, J. R., Mathew, A. S., & Nath, S. (2021). Arytenoid asymmetry: Is it the most predictive parameter for arytenoid adduction in unilateral vocal fold paralysis? The Journal of Laryngology and Otology, 135(2), 159-167. https://doi.org/10.1017/S0022215121000475
Menon JR, Mathew AS, Nath S. Arytenoid Asymmetry: Is It the Most Predictive Parameter for Arytenoid Adduction in Unilateral Vocal Fold Paralysis. J Laryngol Otol. 2021;135(2):159-167. PubMed PMID: 33593469.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Arytenoid asymmetry: Is it the most predictive parameter for arytenoid adduction in unilateral vocal fold paralysis? AU - Menon,J R, AU - Mathew,A S, AU - Nath,S, Y1 - 2021/02/17/ PY - 2021/2/18/pubmed PY - 2021/3/23/medline PY - 2021/2/17/entrez KW - Arytenoid Cartilage KW - Laryngeal Muscles KW - Laryngoplasty KW - Laryngoscopy KW - Vocal Cord Paralysis SP - 159 EP - 167 JF - The Journal of laryngology and otology JO - J Laryngol Otol VL - 135 IS - 2 N2 - OBJECTIVE: The aim of this study was to establish arytenoid asymmetry as a pre-operative predictive parameter for arytenoid adduction surgery in unilateral vocal fold paralysis and thereafter identify the most predictive parameter for arytenoid adduction among the established parameters. METHODS: A retrospective comparative study was undertaken. The 'arytenoid asymmetry angle' formed between skewed 'glottic' and 'interarytenoid' axes (traced along the plane of closure of the membranous and cartilaginous glottis, respectively) was quantified in pre-operative laryngoscopic images of 85 adults with unilateral vocal fold paralysis who underwent either type 1 thyroplasty (group 1) or type 1 thyroplasty with arytenoid adduction (group 2). The need for arytenoid adduction was determined intra-operatively based on subjective voice improvement and laryngoscopic results. RESULTS: Arytenoid asymmetry (p < 0.0001), posterior phonatory gap (p = 0.001) and vertical level difference (p = 0.004) were significantly greater in group 2 (descending order of parameters). Arytenoid asymmetry angle showed a significant positive correlation with the latter two parameters. CONCLUSION: Arytenoid asymmetry is the most predictive parameter for arytenoid adduction. An arytenoid asymmetry angle of more than or equal to 33.9⁰ is an indication for arytenoid adduction. This aids in pre-operative planning of arytenoid adduction. SN - 1748-5460 UR - https://www.unboundmedicine.com/medline/citation/33593469/Arytenoid_asymmetry:_Is_it_the_most_predictive_parameter_for_arytenoid_adduction_in_unilateral_vocal_fold_paralysis L2 - https://www.cambridge.org/core/product/identifier/S0022215121000475/type/journal_article DB - PRIME DP - Unbound Medicine ER -