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- W2069651018 abstract "Early graft dysfunction after lung transplantation is a significant and unpredictable problem. Our study aimed at a detailed investigation of structure-function correlations in a rat isolated heart-lung model ofischemia/ reperfusion injury. Variable degrees of injury were induced by preservation with potassium-modified Euro-Collins solutions, 2 hr of cold ischemia, and 40 min of reperfusion. Pulmonary artery pressure (Ppa), pulmonary vascular resistance (PVR), peak inspiratory pressure (PIP), and perfusate gases (deltaPO2, deltaPCO2) were recorded during reperfusion. Right lungs were used to calculate W/D-weight ratios. Nineteen experimental and six control left lungs were fixed for light and electron microscopy by vascular perfusion. Systematic random samples were analyzed by stereology to determine absolute and relative volumes of lung structures, the amount of interstitial and intraalveolar edema, and the extent of epithelial injury. Lectin- and immunohistochemistry using established epithelial cell markers were performed in three animals per group to reveal sites of severe focal damage. Experimental lungs showed a wide range in severity of ischemia/ reperfusion injury. Intraalveolar edema fluid amounted to 77-909 mm3 with a mean of 448+/-250 mm3 as compared with 22+/-22 mm3 in control lungs (P<0.001). Perfusate oxygenation (deltaPO2) decreased from 30.5+/-15.2 to 21.7+/-15.2 mm Hg (P=0.05) recorded after 5 and 40 minutes of reperfusion. In experimental lungs, a surface fraction of 1% to 58% of total type I pneumocyte surface was damaged. Intraalveolar edema per gas exchange region (Vv ape,P) and deltaPO2 were related according to deltaPO2 = 96 - 60 x log10(Vv ape,P) [mm Hg]. The extent of epithelial injury did not correlate with deltaPO2 nor with intraalveolar edema, but increased significantly with PVR. Lectin- and immunohistochemistry revealed focal severe damage to the alveolar epithelium at the border of perivascular cuffs." @default.
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- W2069651018 date "1999-05-01" @default.
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- W2069651018 title "Pulmonary ischemia/reperfusion injury: A quantitative study of structure and function in isolated heart‐lungs of the rat" @default.
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- W2069651018 doi "https://doi.org/10.1002/(sici)1097-0185(19990501)255:1<84::aid-ar10>3.0.co;2-#" @default.
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