Test–Retest Reliability of Respiratory Resistance Measured With the Airflow Perturbation Device Purpose In this study, the authors aimed to determine reliability of the airflow perturbation device (APD) to measure respiratory resistance within and across sessions during resting tidal (RTB) and postexercise breathing in healthy athletes, and during RTB across trials within a session in athletes with paradoxical vocal fold motion (PVFM) ... Research Note
Research Note  |   August 01, 2014
Test–Retest Reliability of Respiratory Resistance Measured With the Airflow Perturbation Device
 
Author Affiliations & Notes
  • Sally K. Gallena
    University of Maryland, College Park
    Loyola University Maryland, Baltimore
  • Nancy Pearl Solomon
    Walter Reed National Military Medical Center, Bethesda, MD
  • Arthur T. Johnson
    University of Maryland, College Park
  • Jafar Vossoughi
    University of Maryland, College Park
    Engineering and Scientific Research Associates, Olney, MD
  • Wei Tian
    University of Maryland, College Park
    University of Washington, Seattle
  • Disclosure: The authors have declared that no competing interests existed at the time of publication.
    Disclosure: The authors have declared that no competing interests existed at the time of publication.×
  • Correspondence Sally J. K. Gallena: sgallena@loyola.edu
  • Editor: Jody Kreiman
    Editor: Jody Kreiman×
  • Associate Editor: Kate Bunton
    Associate Editor: Kate Bunton×
Article Information
Speech, Voice & Prosodic Disorders / Voice Disorders / Research Issues, Methods & Evidence-Based Practice / Speech / Research Note
Research Note   |   August 01, 2014
Test–Retest Reliability of Respiratory Resistance Measured With the Airflow Perturbation Device
Journal of Speech, Language, and Hearing Research, August 2014, Vol. 57, 1323-1329. doi:10.1044/2014_JSLHR-S-13-0246
History: Received September 16, 2013 , Revised January 9, 2014 , Accepted February 1, 2014
 
Journal of Speech, Language, and Hearing Research, August 2014, Vol. 57, 1323-1329. doi:10.1044/2014_JSLHR-S-13-0246
History: Received September 16, 2013; Revised January 9, 2014; Accepted February 1, 2014
Web of Science® Times Cited: 1

Purpose In this study, the authors aimed to determine reliability of the airflow perturbation device (APD) to measure respiratory resistance within and across sessions during resting tidal (RTB) and postexercise breathing in healthy athletes, and during RTB across trials within a session in athletes with paradoxical vocal fold motion (PVFM) disorder.

Method Prospective, repeated-measures design. The APD measured respiratory resistance during 3 baseline assessments in 24 teenage female athletes, 12 with and 12 without PVFM. Control athletes provided data at rest and following a customized exercise challenge during each of 3 sessions. Intraclass correlation coefficient (ICC) analysis assessed strength of relationships, and repeated-measures analysis of variance assessed differences across trials and sessions.

Results ICC analyses confirmed strong correlations across RTB trials for inspiratory, expiratory, and mean respiratory resistance in both groups. Inspiratory resistance decreased ~5% between sessions for control participants; expiratory and mean respiratory resistances were stable. Data from control athletes across sessions and following rigorous exercise were strongly correlated when taken at comparable intervals.

Conclusions APD-measured respiratory resistance, including separate assessments for the inspiratory and expiratory phases, has strong test–retest reliability during RTB and after exercising. This suggests that the APD is a useful measurement tool for the assessment of airway function in patients suspected of having PVFM.

Acknowledgments
This research represents a portion of a doctoral dissertation by Sally K. Gallena directed by Wei Tian and Nancy Pearl Solomon and could not have been completed without support from the Department of Hearing and Speech Science, University of Maryland. This research was supported in part by National Institutes of Health Grant R43HD062066, awarded to Jafar Vossoughi. A previous version of this research was presented at the 2011 Annual Convention of the American Speech-Language-Hearing Association. The views expressed in this article are those of the authors and do not reflect the official policies of the Department of Defense or U.S. government.
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