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- W2022856566 abstract "To determine the effects of high oxygen (O2) tension on pulmonary vascular reactivity, we exposed rats either to 100% O2 for 48 hours or 40% O2 for 3 to 5 weeks. Lungs from all rats were isolated, blood perfused and ventilated, and pressor responses to airway hypoxia and to infused angiotensin II were measured. We found that chronic subtoxic hyperoxia did not augment subsequent hypoxic vasoconstriction, and that 48 hrs of 100% O2 markedly blunted hypoxic vasoconstriction. Meclofenamate restored hypoxic vasoconstriction to control levels in the lungs with blunted responses. Evidence for O2 toxicity in the lungs exposed to 100% O2 included interstitial swelling with alveolar exudates seen by light microscopy, and lung edema by water content calculations. We conclude that 1) chronic subtoxic hyperoxia does not influence subsequent hypoxic vasoconstriction, and 2) a dilator prostaglandin produced in the lung is a potent inhibitor of hypoxic vasoconstriction in O2 toxic lungs." @default.
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- W2022856566 date "1981-07-01" @default.
- W2022856566 modified "2023-09-23" @default.
- W2022856566 title "Blunted pulmonary pressor responses to hypoxia in blood perfused, ventilated lungs isolated from oxygen toxic rats: Possible role of prostaglandins" @default.
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- W2022856566 doi "https://doi.org/10.1016/0090-6980(81)90050-2" @default.
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