Cough and Swallowing Therapy and Their Effects on Vocal Fold Bowing and Laryngeal Lesions

Author:

Doruk Can12ORCID,Curtis James A.3ORCID,Dakin Avery E.1,Troche Michelle S.1

Affiliation:

1. Laboratory for the Study of Upper Airway Dysfunction, Department of Biobehavioral Sciences Teachers College, Columbia University New York New York USA

2. Center for Voice and Swallowing, Department of Otolaryngology‐Head & Neck Surgery Columbia University Irving Medical Center New York New York USA

3. Aerodigestive Innovations Research lab (AIR), Department of Otolaryngology‐Head & Neck Surgery Weill Cornell Medical College New York New York USA

Abstract

ObjectiveExpiratory muscle strength training (EMST) and sensorimotor training of airway protection (smTAP) are two exercises intended to improve cough and swallowing in people with Parkinson's Disease (PwPD). The aims of this study were to (1) examine whether EMST or smTAP elicit changes to vocal fold bowing; and (2) describe the safety of EMST and smTAP as it relates to the development of vocal fold lesions.Method(s)This was a secondary analysis of data from PwPD who completed EMST or smTAP as part of a prospective randomized controlled trial. Vocal fold bowing (BI) and the presence of laryngeal lesions were blindly analyzed from flexible endoscopic evaluation of swallowing (FEES) using ImageJ software and operational definitions. Linear regression was used to examine the influence time (pre‐ vs. post‐therapy) and therapy (EMST vs. smTAP) on vocal fold bowing. Descriptive statistics were used to describe the presence of laryngeal lesions.Result(s)Overall, 56 participants were included, 28 per group. The median BI scores pre‐ and post‐therapy were 8.2% and 8.3% for the EMST group and 11.3% and 8.4% for the smTAP group, respectively. Statistical analyses revealed insufficient evidence to suggest an effect of time and treatment type on BI (p > 0.05) or on the presence of vocal fold lesions (p > 0.05).ConclusionBased on these and previous findings, it appears that changes in vocal fold bowing do not drive treatment effects following EMST and smTAP. Also, this study further supports the safety of smTAP and EMST despite the required forceful exhalation and repetitive coughing.Level of Evidence4 Laryngoscope, 2023

Funder

Michael J. Fox Foundation for Parkinson's Research

Publisher

Wiley

Subject

Otorhinolaryngology

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