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How the Input Impedance Relates to Airway Characteristics

[+] Author Affiliations
S. H. Cheong, S. H. Ro

Kumoh National Institute of Technology, Gyeongbuk, South Korea

A. M. Al-Jumaily

Auckland University of Technology, Auckland, New Zealand

Paper No. IMECE2007-43283, pp. 351-353; 3 pages
doi:10.1115/IMECE2007-43283
From:
  • ASME 2007 International Mechanical Engineering Congress and Exposition
  • Volume 2: Biomedical and Biotechnology Engineering
  • Seattle, Washington, USA, November 11–15, 2007
  • Conference Sponsors: ASME
  • ISBN: 0-7918-4296-7 | eISBN: 0-7918-3812-9
  • Copyright © 2007 by ASME

abstract

To understand how the input impedance determined at the throat correlates with changes in the dynamic characteristics of the airways, a simplified 5-lobe model is developed and simulated. The model takes into account some realistic conditions such as varying cross-sectional areas, flexible wall properties and branching. The lobe terminal impedances are implemented in the model to predict the input impedance at the throat. The effects of airway constrictions and wall eleatance variations on this impedance are determined for a range of frequencies. It is concluded that the developed model is capable of predicting various physiological changes in the airway passages.

Copyright © 2007 by ASME

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