Abstract
Summary1. In barbitalized rabbits subjected to operations on the spinal column, cord and skull, air embolism is not a negligible danger; 14 out of 37 rabbits showed air bubbles in the pulmonary artery. Acute death after such operations in the rabbit must not be diagnosed as “vascular shock,” tacitly implying a nervous component, until a careful autopsy has excluded air embolism.2. Air bubbles were observed entering and coursing through exposed sections of the diploic veins of the parietal bone during inspiration.3. Absence of air bubbles in the right heart and pulmonary artery does not exclude air embolism for the air may have been absorbed. The diagnosis of air embolism may still be made if fibrin is found in the heart. Fibrin formation in the heart, especially the right ventricle, was seen 6, possibly 7, times when no air bubbles were detectable anywhere. Occasionally a slight amount of fibrin may also be detected in the left ventricle. Here apparently some air bubbles passed through the pulmonary circu...
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