Journal of Speech, Language, and Hearing Research Vol.53 1555-1566 December 2010. doi:10.1044/1092-4388(2010/09-0249)
© American Speech-Language-Hearing Association
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Articles

Nebulized Isotonic Saline Versus Water Following a Laryngeal Desiccation Challenge in Classically Trained Sopranos

Kristine Tanner
Nelson Roy
The University of Utah, Salt Lake City

Ray M. Merrill
Brigham Young University, Provo, UT

Faye Muntz
Daniel R. Houtz
Voice Disorders Center, The University of Utah, Salt Lake City

Cara Sauder
University of New Mexico Hospitals, Albuquerque

Mark Elstad
George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, UT, and The University of Utah, Salt Lake City

Julie Wright-Costa
The University of Utah, Salt Lake City

Contact author: Kristine Tanner, Department of Communication Sciences and Disorders and Division of Otolaryngology—Head & Neck Surgery, The University of Utah, Salt Lake City, UT 84112. E-mail: kristine.tanner{at}hsc.utah.edu.

Purpose: To examine the effects of nebulized isotonic saline (IS) versus sterile water (SW) on self-perceived phonatory effort (PPE) and phonation threshold pressure (PTP) following a surface laryngeal dehydration challenge in classically trained sopranos.

Method: In a double-blind, within-subject crossover design, 34 sopranos breathed dry air (relative humidity < 1%) transorally for 15 min and then nebulized 3 mL of IS or SW, or experienced a no-treatment control condition over 3 consecutive weeks. PPE and PTP were measured every 15 min from baseline through 2 hr postdesiccation.

Results: PPE increased significantly following the laryngeal desiccation challenge in all 3 treatment conditions (p < .01). After nebulization, PPE returned to baseline for the IS condition only. For the SW and control conditions, PPE remained above baseline during the 2 hr after desiccation. No statistically significant changes in PTP following laryngeal desiccation were observed, although values for the IS condition remained below baseline for nearly 2 hr after nebulization. PPE and PTP were not significantly correlated.

Conclusions: Following a laryngeal surface dehydration challenge, classically trained sopranos reported increased vocal effort that persisted for at least 2 hr. Compared with SW, nebulized IS showed promise as an effective way to remediate the adverse, self-perceived effects of laryngeal desiccation.

KEY WORDS: isotonic saline, laryngeal desiccation, singers, hydration, voice production


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