PULMONARY COMPLICATIONS

Abstract
During the past five years a new anesthetic gas, cyclopropane, has been gradually introduced into medicine. Its anesthetic properties were discovered in 1929,1and its true value has since been established step by step by active cooperation among anesthetists and surgeons,2physicians3and physiologists and pharmacologists,4particularly those at the University of Wisconsin. The method of introduction, although the gas is revolutionary in its field, has been a model of cautious statement, completely lacking in the publicity and exploitation that has accompanied lesser events. The new and unique value of cyclopropane lies in the high oxygen content with which it can be used. For instance, two patients at St. Luke's Hospital were anesthetized directly from an oxygen tent, were returned to the tent after operation and recovered. Other features of this anesthetic, such as ease and pleasantness of induction,5greater relaxation than that produced by

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