Inspiratory and Expiratory Resistances During Exercise.
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Date
2013-10
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Abstract
Aims: Paradoxical vocal fold motion, especially during exercise, causes symptoms of
dyspnea in patients experiencing this condition. At present, the standard means to
diagnose this condition is invasive using a laryngoscope. The Airflow Perturbation Device
(APD) could offer a simpler means of diagnosis and monitoring, but the APD must be
validated with laryngoscopy. Both devices require access to the mouth, and so cannot be
used simultaneously. The aim of this study was to determine if respiratory resistance of
exercising subjects changes immediately after exercise begins and ends.
Study Design: The study was conducted as a prospective study.
Place and Duration of Study: All tests were conducted in the Human Performance
Laboratory, Fischell Department of Bioengineering, University of Maryland, College Park,
MD between August 2011 and August 2012.
Methodology: Fifteen subjects exercised on a bicycle ergometer at 70% of maximum
predicted heart rate while breathing through the APD.
Results: Results show that APD measurements made just prior and after the cessation of exercise are comparable.
Conclusion: APD measured inspiration and expiration resistances do not change
immediately after exercise cessation.
Description
Keywords
Airflow perturbation device, exercise flow rates, respiratory resistance, vocal cord dysfunction
Citation
Johnson Arthur T, Chapain Prakash, Slaughter Darnell, Gallena Sally, Vossoughi Jafar. Inspiratory and Expiratory Resistances During Exercise. British Journal of Medicine and Medical Research. 2013 Oct-Dec; 3(4): 1222-1232.