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I like how you used pictures, names, and simple definitions of each time period. I would add more detail to each time period to help explain the significance of each thing. Overall, you did really well and seemed to understand what you were talking about.

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Obstetrician Professor James Y. Simpson starts giving chloroform to women to help ease the pain of Childbirth. Chloroform becomes a popular anesthetic for surgery and dental procedures.

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Dr. Edmund Andrews of Chicago proposes using nitrous oxide mixed with oxygen as an anesthetic in the Chicago Medical Examiner.

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Dr. Karl Koller, who was a Viennese ophthalmologist and colleague of Sigmund Freud, introduces cocaine as an anesthetic for eye surgery. Later, Dr. William S. Halsted uses cocaine for the first nerve block with cocaine.

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Two medical students, E. Amory Codman and Harvey Cushing developed the first anesthesia record using observed respiratory rate and the palpitated pulse rate. By 1901, Cushing added blood measurement by Riva Rocci Sphygmanometry.

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- The first two editions of "Anesthesia", the USA's first comprehensive textbook on anesthesia, were published by Dr. James T. Gwathmey, the 1912 NYSA (the New York Society of Anesthetists) President.
-Dr. Dennis E. Jackson develops a carbon dioxide (CO2) absorbing anesthesia system, allowing for a patient to re-breathe exhaled air containing the anesthetic, cleansed of the carbon dioxide, resulting in the use of less anesthetic and the avoidance of waste.

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Dr. Isabella Herb administered the very first ethylene-oxygen surgical anesthetic, which demonstrated the trance-like state of the patient when she administered the low dose of ethylene.

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After forming the American Board of Surgery and administering its first written examination, the American Board of Anesthesiology (ABA) was granted its own independent board status. Anesthesiology was defined as a medical specialty by the ABA and this provided formal recognition for physicians specializing in the science of anesthesia.

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Dr. Harold Griffith and Enid Johnson were supplied pharmaceutical grade curare, which served as the world's 1st successful anesthetic use of the muscle relaxant. The curare had been received in raw form in 1939 following an expedition by Richard C. Gill.

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The ASA publishes its first Difficult Airway Algorithm, which specializes in a safe, systematic approach for patients in assisted ventilation under general anesthesia. The anesthetic introduced in 1991, Desflurane, required the development of a new kind of vaporizer. This anesthetic had such a low boiling point that it required the first difficult airway algorithm.