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Advan. Physiol. Edu. 33: 53-59, 2009; doi:10.1152/advan.90177.2008
1043-4046/09 $8.00
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ADV PHYSIOL EDUC 33:53-59, 2009
© 2009 American Physiological Society

RESEARCH-ARTICLE

Human respiratory mechanics demonstration model

Janelle Anderson1, Chris Goplen1, Lynn Murray1, Kristen Seashore1, Malini Soundarrajan1, Andrew Lokuta2, Kevin Strang2 and Naomi Chesler1

1Department of Biomedical Engineering and 2Department of Physiology, University of Wisconsin, Madison, Wisconsin

Address for reprint requests and other correspondence: A. J. Lokuta, Dept. of Physiology, Univ. of Wisconsin School of Medicine and Public Health, 1300 Univ. Ave., Madison, WI 53706 (e-mail: ajlokuta{at}physiology.wisc.edu).

Abstract

Respiratory mechanics is a difficult topic for instructors and students alike. Existing respiratory mechanics models are limited in their abilities to demonstrate any effects of rib cage movement on alveolar and intrapleural pressures. We developed a model that can be used in both large and small classroom settings. This model contains digital pressure displays and computer integration for real-time demonstration of pressure changes that correspond to the different phases of breathing. Moving the simulated diaphragm and rib cage causes a volume change that results in pressure changes visible on the digital sensors and computer display. Device testing confirmed the model's ability to accurately demonstrate pressure changes in proportion to physiological values. Classroom testing in 369 surveyed students showed improved understanding of respiratory concepts (P < 0.05). We conclude that our respiratory mechanics model is a valuable instructional tool and provide detailed instructions for those who would like to create their own.

Key words: respiratory physiology; physiology demonstration; pressure changes; classroom tool; student survey






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