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Vascular Impedance Analysis in Human Pulmonary Circulation

[+] Author Affiliations
Qinlian Zhou, Jian Gao, R. T. Yen

University of Memphis, Memphis, TN

Wei Huang

University of California at San Diego, La Jolla, CA

Paper No. IMECE2002-33525, pp. 433-434; 2 pages
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Advances in Bioengineering
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Bioengineering Division
  • ISBN: 0-7918-3650-9 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME


Vascular impedance in human pulmonary circulation is analyzed by the fluid dynamic approach. A model representing the entire system of pulmonary circulation is constructed based on experimentally measured morphometric and elasticity data of the vessels. The pulmonary arteries and veins are considered as elastic tubes. Their impedance follows Womersley’s theory and electric analogue. The “sheet-flow” theory is employed to describe the flow in capillaries and thus a microvascular impedance matrix is derived. The input impedance at the main pulmonary artery is calculated under both zone 3 and zone 2 conditions. The results are compared with available experimental data in the literature.

Copyright © 2002 by ASME



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