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American Journal of Pathology, Vol 128, 241-251, Copyright © 1987 by American Society for Investigative Pathology

REGULAR ARTICLES

Pulmonary permeability edema in a large animal model of nonpulmonary sepsis. A morphologic study

I Craig, D Judges, A Gnidec, M Lefcoe, N Paterson, R Finley and W Sibbald

Morphologic studies were undertaken in a sheep model of pulmonary permeability edema (PPE) induced by cecal ligation and perforation. Biopsies taken every 24 hours through 96 hours following induction of sepsis showed, at 24 hours, interstitial edema accompanied by widespread aggregation of polymorphonuclear leukocytes. This was confirmed by electron microscopy, which also demonstrated endothelial cell swelling, platelet aggregation, and fibrin deposition. By 48 hours, a "thromboangiitis" had developed that persisted through 96 hours. In vitro pulmonary angiograms done at 60 and 96 hours showed multiple filling defects; it was possible to demonstrate that these defects corresponded to the "thromboangiitis." These thrombotic lesions, which were not the result of embolization from indwelling lines, closely resembled vascular changes described in the adult respiratory distress syndrome. It is believed that this is the first time that such lesions have been described in a model of PPE resulting from nonpulmonary sepsis.


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Copyright © 1987 by the American Society for Investigative Pathology.