Document Detail


Effect of hypoxia on lung fluid balance in ferrets.
MedLine Citation:
PMID:  8173749     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To determine how hypoxia may alter determinants of pulmonary transvascular fluid flux, adult male ferrets were exposed to either room air (C) or hypoxia (H; FIO2 = 0.12) for 24 h. After anesthesia and ventilation with C or H, the mean pulmonary artery pressures were 18.4 +/- 2.2 (SEM) and 27.3 +/- 2.9 mm Hg, respectively (p < 0.025). The right lung was then removed for gravimetric analysis of lung water and the left lung was blood-perfused (approximately 142 ml/kg/min) and continuously weighed for 15 min at left atrial pressures of 20, 25, and 30 mm Hg. Filtration coefficient (Kf) was estimated from the slopes of the relationships of rate of weight gain versus change in vascular pressure over the last 5 min of each interval. Extravascular lung water/blood-free dry lung weight for C and H were 2.95 +/- 0.06 (SEM) and 3.53 +/- 0.09 ml/g, respectively (p < 0.01). Kf for C and H were 0.0645 +/- 0.0190 (SEM) and 0.0662 +/- 0.0085 ml/min/mm Hg/100 g, respectively (NS). In a second group of experiments, in which lungs were removed from ferrets after 24 h exposures to C or H, protein reflection coefficients (sigma) were estimated by comparing the increases in perfusate hematocrit and protein concentrations during edema formation. Reflection coefficients for albumin were 0.64 +/- 0.03 (SEM) and 0.39 +/- 0.07 with C and H, respectively (p < 0.01). The sigma values for IgG and IgM were not affected.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
P White; J T Sylvester; R L Humphrey; T Permutt; S Permutt; R Brower
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of respiratory and critical care medicine     Volume:  149     ISSN:  1073-449X     ISO Abbreviation:  Am. J. Respir. Crit. Care Med.     Publication Date:  1994 May 
Date Detail:
Created Date:  1994-06-07     Completed Date:  1994-06-07     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9421642     Medline TA:  Am J Respir Crit Care Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1112-7     Citation Subset:  AIM; IM    
Affiliation:
Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, Maryland.
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MeSH Terms
Descriptor/Qualifier:
Acute Disease
Animals
Anoxia / immunology,  pathology,  physiopathology*
Blood Pressure
Extravascular Lung Water / physiology*
Ferrets
Immunoglobulin G / analysis
Immunoglobulin M / analysis
Lung / pathology
Male
Organ Size
Pulmonary Artery / physiopathology
Chemical
Reg. No./Substance:
0/Immunoglobulin G; 0/Immunoglobulin M

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


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