Lectures on general anaesthetics in dentistry, advocating painless dental operations by the use of nitrous oxid, nitrous oxid and oxygen, chloroform, ether, ethyl chloride and somnoform . alyzing respiration by curare—the same effectsfollow. It is not difficult to understand, as nitrous oxid pro-duces asphyxia if air is excluded, and the post-mortemexamination of an animal that has died from nitrousoxid shows the same pathologic condition of the heartas is found when death results from asphyxia, thatnitrous oxid should have been classed as an asphyxiat-ing agent rather than an anaesthetic agen
Lectures on general anaesthetics in dentistry, advocating painless dental operations by the use of nitrous oxid, nitrous oxid and oxygen, chloroform, ether, ethyl chloride and somnoform . alyzing respiration by curare—the same effectsfollow. It is not difficult to understand, as nitrous oxid pro-duces asphyxia if air is excluded, and the post-mortemexamination of an animal that has died from nitrousoxid shows the same pathologic condition of the heartas is found when death results from asphyxia, thatnitrous oxid should have been classed as an asphyxiat-ing agent rather than an anaesthetic agent. It is gen-erally conceded that nitrous oxid is a heart stimulantand causes increased blood pressure. Kemp thinks that contraction of the renal vesselstakes place, resulting in a decreased urinary secretion ;also that albuminaria is oroduced in a slight degree incomplete narcosis. An overdose of nitrous oxid produces death innearly all cases from asphyxiation, the heart in somecases continuing to beat for a period of several min-utes after breathing ceases. Hewitt thinks the imme-diate cause of respiratory arrest is usually muscularspasm. 112 General Jiucsthetics in The McKesson Apparatus with two small tanks as they maybe attached, and showing the automatic bag-filling valves con-nected by small rubber tubings, which may be attached to a gasplant, large cylinders or, with a special yoke ajid pressure-reducingvalve, to one or two small tanks in another room. The technic of administering gas and oxygen with the McKes-son Apparatus is easily acquired, because the instrument worksautomatically. Without attention, it keeps the supply bags prop-erly filled with their respective gases, produces an absolutelyuniform mixture, permits the patient to rebreathe only a certaindesired portion of each exhalation, prevents contamination of theoxygen and nitrous oxid supply bags with breathed gases and General Anccsthetics in Dentistry. 113 Nitrous oxid gas is made by heating a
Size: 1200px × 2082px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectanesthe, bookyear1912
