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Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults

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Evaluation of auditory and visual feedback for airflow interruption.

Matthew R Hoffman¹, Adam L Rieves, Ketan Surender

¹Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA.

Journal of Voice : Official Journal of the Voice Foundation

|January 3, 2013

Summary

Auditory and visual feedback significantly improve the consistency of aerodynamic parameter measurements, specifically laryngeal airway resistance (RL) and mean flow rate (MFR). Each feedback method is superior to no feedback for enhancing subject performance.

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Area of Science:

Speech Science
Aerodynamics
Bioengineering

Background:

Clinical measurement of aerodynamic parameters using mechanical interruption methods is challenged by high intrasubject variability.
Improving intrasubject reliability is crucial for accurate aerodynamic assessment.

Purpose of the Study:

To evaluate the impact of auditory and visual feedback on subject performance during aerodynamic parameter measurement.
To determine if feedback enhances the reliability of airflow interrupter measurements.

Main Methods:

Eleven subjects underwent measurements using an airflow interrupter with four conditions: no feedback, auditory feedback, visual feedback, and combined feedback.
Paired t tests and one-way repeated measures ANOVA were used to analyze the effect of feedback on subglottal pressure (Ps), mean flow rate (MFR), and laryngeal airway resistance (RL).

Main Results:

All feedback methods significantly reduced the coefficient of variation (CV) for RL compared to the control.
Auditory and combined feedback significantly decreased the CV for MFR.
Mean MFR was higher with visual feedback than with auditory feedback.

Conclusions:

Auditory, visual, and combined feedback enhance intrasubject consistency in RL measurements.
Feedback positively impacts MFR more than Ps.
All feedback methods are preferable to no feedback; further research into visual feedback could optimize MFR and RL measurements.