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Chapter-11 Ventilation Homogeneity and Lung Elasticity

BOOK TITLE: Diagnostic Evaluation of the Respiratory System

Author
1. Sorino Claudio
2. Pistelli Riccardo
ISBN
9789386056009
DOI
10.5005/jp/books/13029_12
Edition
1/e
Publishing Year
2017
Pages
7
Author Affiliations
1. S. Anna Hospital, Como, Italy; University of Palermo, Palermo, Italy; Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, Arizona, USA
2. Catholic University of the Sacred Heart; Columbus-Gemelli University Hospital, Rome, Italy
Chapter keywords
Ventilation homogeneity, lung elasticity, lung ventilation, molecular diffusion, respiratory system, thoracic respiratory system, elastic recoil pressure, ERP, airways frictional resistance, AWR

Abstract

The objective of this chapter is to introduce the ventilation homogeneity and lung elasticity. The term lung ventilation refers to the process in which a gas mixture continuously cycles between entering and leaving the air spaces of the lung. Traditional subdivisions of the overall lung ventilation are alveolar space ventilation and dead space ventilation, which refer to the ventilation of air spaces delimited and nondelimited by alveoli, respectively. Molecular diffusion is the principal mechanism of gas mixing in the lung. It is due to the random movement of gas molecules and results in a net transfer of given gas species from regions of high concentration to regions of low concentration. This chapter covers the statics of lung elasticity, dynamics of lung elasticity and physiological methods to study the distribution of ventilation.

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