A self-retaining air-tight face-piece for nitrous oxide-oxygen anesthesia / by Walter M. Boothby, A.M., M.D., assistant in anatomy, Harvard Medical School; assistant surgeon, Mount Sinai Hospital, Boston.

  • Boothby, Walter M.
Date:
[1912?]
Catalogue details

Licence: In copyright

Credit: A self-retaining air-tight face-piece for nitrous oxide-oxygen anesthesia / by Walter M. Boothby, A.M., M.D., assistant in anatomy, Harvard Medical School; assistant surgeon, Mount Sinai Hospital, Boston. Source: Wellcome Collection.

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    / [Reprinted from the Boston Medical and Surgical Journal, Vol. clxvi, No. 9, pp. 328, 329, Feb. 29, 1912.] \+*y A SELF-RETAINING AIR-TIGHT FACE-PIECE FOR NITROUS OXIDE-OXYGEN ANES¬ THESIA. BY WALTER M. BOOTHBY, A.M., M.D., Assistant in Anatomy, Harvard Medical School; Assistant Surgeon, Mount Sinai Hospital, Boston. Last year I took up the task of developing a nitrous oxide-oxygen apparatus that would pro¬ duce a surgical anesthesia with the patient relaxed in all cases. Early in the study of the problem it became evident that there are five fundamental requirements that must be met. These requirements are: constantly the desired amount of nitrous oxide and oxygen by merely setting one valve for each gas; that it must continue to deliver this same amount as long as desired without further attention; and that it be possible, instantly and independently, to change the rate of flow of each gas. 2. In order to be able at a glance to estimate the relative rate of flow of each gas, the mixing chamber must be of glass containing water and the pipes so arranged that each gas bubbles into the chamber separately. 3. It is well recognized that to produce relaxa¬ tion in all cases ether vapor must be given in addi¬ tion to the gas-oxygen in a certain number of cases; it is also recognized that different cases may require amounts of ether vapor varying within wide limits, and further that it is necessary to be able gradually and yet rapidly to vary the ether percentage. l thA Q