Document Detail


Alveolar surface area-to-lung volume ratio in oleic acid-induced pulmonary edema.
MedLine Citation:
PMID:  8964731     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
It is unknown how the in vivo alveolar surface area-to-volume ratio (S/V) changes in low-pressure pulmonary edema. Here, the S/V is the area of the air-tissue interface per unit total volume (air plus tissue). We hypothesized that in oleic acid (OA)-induced edema inactivation of the pulmonary surfactant may increase surface tension and decrease the S/V at any given lung volume. OA (0.04 mg/kg) was intravenously injected into dogs. We measured the in vivo S/V (equivalent to the inverse of optical mean free path by light-scattering stereology and the pressure-volume (PV) curve 60-90 min after OA administration. OA administration decreased the lung volume at each transpulmonary pressure and increased the wet-to-dry weight ratio. The S/V decreased after OA administration (optical mean free path increased). The air-filled PV curves shifted downward after OA, but the saline-filled PV curves after OA administration did not differ significantly from control saline-filled curves. The difference in transpulmonary pressure between air- and saline-filled PV curves (an index of the magnitude of surface tension) was increased in OA-induced pulmonary edema. This study suggests that in OA-induced pulmonary edema the alveolar surface tension increases and the S/V decreases, presumably due to inactivation of surfactant by serum leakage to alveoli.
Authors:
S Suzuki; T Akahori; N Miyazawa; M Numata; T Okubo; J P Butler
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  80     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1996 Mar 
Date Detail:
Created Date:  1996-12-03     Completed Date:  1996-12-03     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  742-6     Citation Subset:  IM    
Affiliation:
First Department of Internal Medicine, Yokohama City University School of Medicine, Japan.
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MeSH Terms
Descriptor/Qualifier:
Animals
Dogs
Kinetics
Lung / physiopathology*
Oleic Acids / pharmacology*
Pulmonary Edema / chemically induced*
Surface Tension*
Chemical
Reg. No./Substance:
0/Oleic Acids

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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