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Pulmonary air embolization in the dog: postmortem findings.

The effect of acute pulmonary air embolization on lung morphology was investigated in twenty-eight dogs. In sixteen animals, no lesions were observed. In twelve dogs, a slight oedema formation was found on histological examination only. No relation to the pulmonary arterial pressure increase was detected. Arterial hypoxaemia had appeared in oedematous as well as non-oedematous dogs. Thus, pulmonary oedema did not seem to depend on pulmonary arterial pressure rise or to contribute to the arterial hypoxaemia after lung embolization with air.