| A meta-analysis of outcomes of hydration intervention on phonation threshold pressure. | |
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MedLine Citation:
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PMID: 20359862 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVES: Vocal fold hydration is purported to promote optimal biomechanical characteristics of vocal fold mucosa, increase efficiency of vocal fold oscillation, and enhance voice quality. The purpose of this work was to determine the magnitude and consistency of the effect of vocal fold hydration on vocal fold function across published clinical studies. METHODS: We completed a comprehensive meta-analysis of the effects of superficial and systemic vocal fold hydration on phonation threshold pressure (PTP), a measure of efficiency of voice production. RESULTS: We identified 34 studies that examined the effects of hydration on vocal function. Of these studies, 14 examined the effects of hydration on PTP. Nine of these articles met the criteria for inclusion in this analysis. We observed an average effect size of 0.33, indicating that, overall, hydration treatment demonstrated a tendency to reduce PTP. However, this decrease in phonatory effort did not reach significance at the 95% confidence level. The effects of hydration intervention varied considerably across studies (-0.19 to 3.96). We considered that two factors, pitch level of the task and vocal health of participants, may have contributed to this variability in findings. However, our analysis found that these factors could not account for differences in effect size. CONCLUSION: To understand the variability in outcomes across studies, the role of factors that may impact the effects of hydration, such as the amount, type, and duration of intervention, must be determined. Only then can we obtain data to guide best clinical practice for protecting and rehabilitating vocal function. |
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Authors:
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Ciara Leydon; Marcin Wroblewski; Naomi Eichorn; Mahalakshmi Sivasankar |
Publication Detail:
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Type: Journal Article; Meta-Analysis Date: 2010-04-01 |
Journal Detail:
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Title: Journal of voice : official journal of the Voice Foundation Volume: 24 ISSN: 1873-4588 ISO Abbreviation: J Voice Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-11-24 Completed Date: 2011-03-04 Revised Date: 2013-05-02 |
Medline Journal Info:
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Nlm Unique ID: 8712262 Medline TA: J Voice Country: United States |
Other Details:
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Languages: eng Pagination: 637-43 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 The Voice Foundation. Published by Mosby, Inc. All rights reserved. |
Affiliation:
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Department of Speech Communication Arts and Sciences, Brooklyn College Brooklyn, New York, USA. cleydon@brooklyn.cuny.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Administration, Inhalation Aerosols Air Pressure Biomechanics Drinking Expectorants / administration & dosage Humans Humidity Nebulizers and Vaporizers Phonation* / drug effects Respiratory Mechanics Viscosity Vocal Cords / drug effects, metabolism* Voice Quality* Water / metabolism* |
| Grant Support | |
ID/Acronym/Agency:
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R03 DC008690-01A2/DC/NIDCD NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Aerosols; 0/Expectorants; 7732-18-5/Water |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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