Many factors enter into the administration of anesthetics now that have not heretofore been considered, such as moisture, heat and oxygen. For this reason figures relating to anesthetics as given in former years have less value to us at this time than if we were continuing the methods previously employed. Nevertheless, it would be foolish for us to go blindly forward without taking into consideration statistics collated by others in different countries and making an intelligent comparison therefrom.
Hewitt, unquestionably, has collected the largest number of statistics. Before taking up the question of American statistics, therefore, it might be well to examine these. By combining Julliard's statistics with those of Ormsby, Hewitt gets over 1,000,000 administrations, with a death-rate of one in 3,162 for chloroform and one in 16,302 for ether. According to these figures ether is more than five times as safe as chloroform. At St. Bartholomew's
GWATHMEY JT. AMERICAN STATISTICS. JAMA. 1912;LIX(21):1844–1846. doi:10.1001/jama.1912.04270110258003
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