The art of anaesthesia . f Ether.—Ashort explanation must be given of the physical laws whichgovern the transfer of ether from the liquid state in theether can to the state of solution in the blood and nervoussystem of the patient. The air around us exists under a pressure of oneatmosphere and this pressure is expressed usually in termsof the height of a column of mercury that it will support— COMPLETE GENERAL ANESTHESIA 65 namely a column of 760 mm. Hg which is known as thenormal barometric pressure at sea level. Air is a mixtureof gases and according to the mechanical theory of gaspressure e
The art of anaesthesia . f Ether.—Ashort explanation must be given of the physical laws whichgovern the transfer of ether from the liquid state in theether can to the state of solution in the blood and nervoussystem of the patient. The air around us exists under a pressure of oneatmosphere and this pressure is expressed usually in termsof the height of a column of mercury that it will support— COMPLETE GENERAL ANESTHESIA 65 namely a column of 760 mm. Hg which is known as thenormal barometric pressure at sea level. Air is a mixtureof gases and according to the mechanical theory of gaspressure each constituent exerts a pressure correspondingto the proportion of that gas present. In atmospheric air,therefore, the oxygen being present to the extent of 20per cent, exerts a pressure of 1/.5 of an atmosphere or 1/5of 760—162 mm. of Hg. (A saturated atmosphere of ethervapor under like conditions exerts a vapor pressure of68 mm. Hg at- 20° C, 182 mm. Hg at 0° C, and about460 mm. at ordinary room temjierature.).
Size: 1835px × 1361px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectanesthe, bookyear1919
