Author : Mark M. Koeroghlian
Publisher :
ISBN 13 :
Total Pages : 386 pages
Book Rating : 4.:/5 (129 download)
Book Synopsis A Dynamic Model of Human Respiratory Mechanics for Use in Respiratory Mask Design and Development by : Mark M. Koeroghlian
Download or read book A Dynamic Model of Human Respiratory Mechanics for Use in Respiratory Mask Design and Development written by Mark M. Koeroghlian and published by . This book was released on 2021 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: A dynamic model of human respiratory mechanics is developed to aid in the design and development of pressure-compensated oxygen masks worn by combat aircrew. Breathing models of varying complexity are formulated using the bond graph method to convey key elements of the system. A simple respiratory mask model containing inhalation and exhalation check valves is combined with the respiratory mechanics model. The system state equations are derived for each of the models presented and constitutive relations are described. Numerical solution of the system state equations is shown to capture dissipative and energy storage effects in respiratory tract and compliant elements of the system. The inclusion of air flow inertance in the model is shown to simplify the state equations by eliminating a non-linear algebraic loop. Respiratory mask performance metrics are presented and results from several case studies with variations in the lung characteristics and breathing scenarios are presented to demonstrate the effectiveness of the model in predicting key physiological measures, reported in the form of flow-volume loops, work of breathing, and mask cavity pressures