What question did this study set out to answer?

To assess and compare the acute pulmonary inflammatory and histopathological responses induced by brief inhalation of high concentrations of nitric oxide relative to nitrogen dioxide.

January 1, 1990Inhalation Toxicology

Nitric Oxide and Nitrogen Dioxide as Inducers of Acute Pulmonary Injury when Inhaled at Relatively High Concentrations for Brief Periods

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Authors

DSD. M. StavertLos Alamos National Laboratory BLBruce E. LehnertCodexis (United States)

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Implication

Controlled animal experiment demonstrates that brief high-concentration nitric oxide inhalation does not trigger pulmonary injury in rats, highlighting nitrogen dioxide as the primary toxic agent.

Key Points

To assess and compare the acute pulmonary inflammatory and histopathological responses induced by brief inhalation of high concentrations of nitric oxide relative to nitrogen dioxide.
Adult male Fischer 344 rats were acutely exposed to nitric oxide (500–1500 ppm, with contaminating nitrogen dioxide ≤30 ppm) or nitrogen dioxide (10–100 ppm) for 5–30 minutes, alongside filtered air controls.
Lungs were harvested 24 hours post-exposure to measure lung wet weights, right cranial lobe dry weights, and histopathologic alterations.
Inhalation of nitric oxide up to 1500 ppm for 15 minutes or 1000 ppm for 30 minutes caused no significant increases in lung weights and no detectable histopathologic damage.
Nitrogen dioxide significantly elevated lung wet and dry weights 24 hours after 30 minutes at 50 ppm and 5–15 minutes at 100 ppm, with histologic lung injury apparent after 30 minutes at 25 ppm.

Cite This Study

Stavert et al. (1990) studied this question.

synapsesocial.com/papers/6a6f3f33e71d69abee07ecef https://doi.org/10.3109/08958379009145245

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Implication

Controlled animal experiment demonstrates that brief high-concentration nitric oxide inhalation does not trigger pulmonary injury in rats, highlighting nitrogen dioxide as the primary toxic agent.

Nitric Oxide and Nitrogen Dioxide as Inducers of Acute Pulmonary Injury when Inhaled at Relatively High Concentrations for Brief Periods

Discussion

Member takes

Implication

Key Points

Cite This Study

Nitric Oxide and Nitrogen Dioxide as Inducers of Acute Pulmonary Injury when Inhaled at Relatively High Concentrations for Brief Periods

Discussion

Member takes

Implication

Key Points

Cite This Study

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