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Related Experiment Video

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Minimally Invasive Murine Laryngoscopy for Close-Up Imaging of Laryngeal Motion During Breathing and Swallowing

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Do obesity and weight loss affect vocal function?

Nancy Pearl Solomon¹, Leah B Helou, Katie Dietrich-Burns

¹Department of Surgery, Walter Reed Army Medical Center, Washington, DC 20307, USA. Nancy.P.Solomon@us.army.mil

Seminars in Speech and Language

|April 15, 2011

Summary

Bariatric surgery did not significantly alter vocal function in obese adults compared to nonobese individuals. However, phonation threshold pressure showed changes over time, suggesting its potential role in assessing voice in obesity.

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Area of Science:

Laryngology
Speech and Hearing Sciences
Bariatric Medicine

Background:

Obesity can increase tissue bulk in the airway, potentially impacting vocal function.
Bariatric surgery is a common intervention for obesity, necessitating an understanding of its effects on voice.

Purpose of the Study:

To investigate the effects of bariatric surgery on vocal function in obese adults.
To compare vocal function changes in obese adults post-bariatric surgery with a nonobese control group over six months.

Main Methods:

A mixed-design study involving eight obese adults undergoing bariatric surgery and eight nonobese adults.
Four assessments over six months, including cross-sectional and longitudinal analyses of acoustic parameters, phonation time, airway resistance, airflow, and phonation threshold pressure (PTP).

Main Results:

No significant preoperative differences in vocal function between obese and nonobese groups.
No significant changes over time in acoustic parameters, phonation time, laryngeal airway resistance, or airflow for either group.
Phonation threshold pressure (PTP) at 30% and 80% of the fundamental frequency range changed significantly over time, with a trend for PTP at 30% F0 to decrease as BMI decreased.

Conclusions:

Bariatric surgery did not lead to significant group differences or longitudinal changes in most vocal function measures.
Phonation threshold pressure (PTP) may be a sensitive measure for assessing vocal function changes related to weight loss in individuals with obesity.
PTP warrants further investigation as a clinical tool for voice assessment in patients with obesity and voice complaints.