Ventilation inhomogeneity: Alveolar mechanics and gas distribution

R. B. Salmon, G. M. Saidel, F. P. Primiano, D. E. Niewoehner, E. H. Chester

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The effects of regional lung differences in alveolar mechanics on the transpulmonary pressure-volume (Ptp-V) relationship and the single-breath washout (SBW) of nitrogen were investigated by mathematical modeling and postmorten human lung experiments. Regional nonuniformity in alveolar collapse and re-opening were associated with differences in gravitational stress or elasticity. Model simulations predict that neither type of regional nonuniformity qualitatively affects the shape of the Ptp-V curve, but does affect the terminal (or small-volume) portion of the SBW. Comparisons of characteristics of the Ptp-V and SBW curves indicate that regional nonuniformity in alveolar collapse is an important mechanism associated with ventilation inhomogeneity.

Original languageEnglish (US)
Pages (from-to)993-1002
Number of pages10
JournalJournal of Biomechanics
Volume16
Issue number12
DOIs
StatePublished - 1983

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