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Computational and Mathematical Methods in Medicine
Volume 2014, Article ID 761712, 10 pages
Research Article

Pressure Dynamic Characteristics of Pressure Controlled Ventilation System of a Lung Simulator

1School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China
2The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310058, China
3Department of Mechanical Engineering, University of Bath, Bath BA2 7AY, UK

Received 1 July 2014; Accepted 22 July 2014; Published 13 August 2014

Academic Editor: Kiao Inthavong

Copyright © 2014 Yan Shi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Mechanical ventilation is an important life support treatment of critically ill patients, and air pressure dynamics of human lung affect ventilation treatment effects. In this paper, in order to obtain the influences of seven key parameters of mechanical ventilation system on the pressure dynamics of human lung, firstly, mechanical ventilation system was considered as a pure pneumatic system, and then its mathematical model was set up. Furthermore, to verify the mathematical model, a prototype mechanical ventilation system of a lung simulator was proposed for experimental study. Last, simulation and experimental studies on the air flow dynamic of the mechanical ventilation system were done, and then the pressure dynamic characteristics of the mechanical system were obtained. The study can be referred to in the pulmonary diagnostics, treatment, and design of various medical devices or diagnostic systems.