In a previous article I1 briefly outlined the evolution of anesthesia for dental purposes, gave the technic for synergistic anesthesia as developed in the course of extensive clinical experience and laboratory investigation, and made a comparison of 55,000 straight nitrous oxid-oxygen anesthesias with 5,000 synergistic anesthesias.
In an experience with 14,300 anesthesias in which synergistic methods were employed, cyanosis, jactitation, holding straps, and all elements of uncertainty were definitely eliminated, and the physical and nervous strain to which the operator employing the older methods was subjected was entirely obviated. Larger amounts of oxygen could be used, and the margin of safety was greatly increased.
Despite these satisfactory results and the apparent perfection of our anesthetic technic, the introduction of ethylene, in 1923, with the favorable reports of the laboratory and clinical findings, warranted us in trying out a number of cases with this agent for purposes of comparison with
ECKER M. IMPROVEMENT IN ANESTHETIC TECHNIC FOR DENTAL SURGERY. JAMA. 1925;84(9):673. doi:10.1001/jama.1925.02660350037010
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