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- W4242451863 abstract "Pulmonary function was assessed in male, F344 rats 1,2,4,7, and 13 weeks after a single 2-hr exposure to 0, 3, 10, or 30 ppm methyl isocyanate. No significant changes were observed in the rats exposed to 3 ppm through 13 weeks. Diffusing capacity (DLco), quasistatic lung compliance, and homogeneity of ventilation, as determined by multibreath nitrogen washout, were depressed in the rats exposed to 10 and 30 ppm by 1 week after exposure. None of the rats exposed to 30 ppm survived beyond 1 week. By 13 weeks, dramatic increases in lung volumes were observed in the rats exposed to 10 ppm, while DLco and lung compliance were only mildly affected. However, volume-specific DLco and compliance were depressed in the rats exposed to 10 ppm, suggesting that lung hyperinflation or other compensatory means of increasing lung size occurred in response to the methyl isocyanate-induced lung lesion. This group also exhibited increased expiratory times during tidal breathing and severely impaired distribution of ventilated air. Collectively, these results suggest the development and likely progression of a severe, obstructive airway lesion with associated gas trapping, and the existence of a pronounced concentration-response relationship between 3 and 10 ppm methyl isocyanate exposures." @default.
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- W4242451863 date "1987-06-01" @default.
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- W4242451863 title "Functional Evidence of Persistent Airway Obstruction in Rats Following a Two-Hour Inhalation Exposure to Methyl Isocyanate" @default.
- W4242451863 doi "https://doi.org/10.2307/3430280" @default.
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