A text-book of practical therapeutics . part of the mouth it can be withdrawn before it chokes thepatient. Jaw forceps may also be employed. The combination of nitrous oxide and oxygen-gas is becomingmore and more popular for many major operations, since the oxygenenables the anesthetist to prolong the anesthesia almost indefinitelyand the patient is never more than just under. By the simul-taneous use of oxygen the rise of blood ordinarily induced is putaside. So far as surgery is concerned, the use of nitrous oxide alonehas been almost completely supplanted by the use of the combined NITROUS
A text-book of practical therapeutics . part of the mouth it can be withdrawn before it chokes thepatient. Jaw forceps may also be employed. The combination of nitrous oxide and oxygen-gas is becomingmore and more popular for many major operations, since the oxygenenables the anesthetist to prolong the anesthesia almost indefinitelyand the patient is never more than just under. By the simul-taneous use of oxygen the rise of blood ordinarily induced is putaside. So far as surgery is concerned, the use of nitrous oxide alonehas been almost completely supplanted by the use of the combined NITROUS OXIDE 401 gases. Particularly is it useful if very weak solutions of some localanesthetic like Schleichs fluid or a per cent, procaine solutionis used, the entire field of the operation as it proceeds being infil-trated as nearly as possible along the lines of its nerve supply. Manyphysicians, particularly those attached to maternities or hospitalsin which assistants trained in the use of this gas are present, are ETHER CONTAINER. Fig. 57.—Nitrous oxide-oxygen-ether apparatus assembled for use. (Connell.) using with good results nitrous oxide gas to relieve the pains ofchildbirth. If given skilfully there is no danger to the mother andbut little danger to the child. Asphyxia of the newborn may bepresent if it is carelessly used. Many anesthetists use an apparatusby which nitrous oxide, oxygen and ether can all be used. (SeeFig. 57.)26 402 DRUGS The following classes of persons, according to Hewitt do betterwith the mixture of oxygen and nitrous oxide than with the nitrousoxide alone: 1. Children (who, with nitrous oxide alone, are liable toinconvenient jactitation). 2. Anemic and debilitated patients, who,like children, quickly exhibit muscular contraction, and in additionto this, remain but a very short time under the influence of nitrousoxide alone. 3. Anyone who has previously exhibited great insus-ceptiblity to nitrous oxide per se (such patients are difficult subje
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