Hyperoxia is known to injure tissues and cells (1) . In a series of papers the quantitative influence of hyperoxia on some aspects of lung ultrastructure was elucidated (2-4) . These studies revealed that hyperoxia resulted in rapid destruction of the pulmonary capillaries, a thickening of the air-blood barrier, and, eventually, a repopulation of the alveolar epithelium by granular pneumocytes ...
