Experimental Studies on the Influences of Various Anesthetical Methods Upon the Water Content in the Lung Part Ⅱ. Experiments of the Influence of Various Anesthetics Upon the Water Content in the Lung

To examine whether anesthetics have to do with the development of postoperative acute pulmonary edema, dogs were anesthetized with either ravonal, ether, cyclopropane, nitrous oxide and ether+hypotensive anesthesia and the water content of the lungs was measured after two hours. The results obtained were as follows: 1) When ravonal was intravenously injected during the respiration under the atmospheric air, the water content of the lungs increased slightly in comparison to the control. This is not to be ascribed to the direct action of ravonal but to anoxia and hypercapnia due to the inhibited respiration. 2) When closed circuit endotracheal anesthesia was performed under inhalation of pure oxygen, with any anesthetic, the water content of the lung did not vary and stayed within the standard deviation of the control