The art of anaesthesia . secondattempt made. If no hesitation occurs the ether may berapidly increased. As soon as the patient has received afew breaths of ether, air is added a breath at a time. Bythis technic we have no blue or even dusky patients at ourgas induction. When Nitrous Oxide is Used Alone.—This type ofadministration is the method usually employed in dentalwork. When a tooth is to be extracted a mouth prop ofcork or other material, made especially for the purpose,must be placed in position before the administration is NITROUS OXIDE 209 begun. The patient furthermore is ordinarily
The art of anaesthesia . secondattempt made. If no hesitation occurs the ether may berapidly increased. As soon as the patient has received afew breaths of ether, air is added a breath at a time. Bythis technic we have no blue or even dusky patients at ourgas induction. When Nitrous Oxide is Used Alone.—This type ofadministration is the method usually employed in dentalwork. When a tooth is to be extracted a mouth prop ofcork or other material, made especially for the purpose,must be placed in position before the administration is NITROUS OXIDE 209 begun. The patient furthermore is ordinarily in a sittingposition. The head must not be extended but should beon a straight line with the body. The administration iscarried out precisely as in the case of N20 induction forether except that (oxygen not being used) we carry onthe administration until slight jactitation of the arms orlegs takes place. If anaesthesia be then discontinued, a period of availableanaesthesia amounting to about fifty seconds will Fig. 99.—The authors cylinder holder. A, brass plate clamp for three one-hundred galloncylinders; B, pin screwing into plate and fitting in socket of table clamp; C, table clamp; D,showing by dotted line the buried channel into which the gas of each cylinder empties, allleaving for face piece (not here shown) by a single rubber tubing. During this period any painful procedure may be carriedout, such as the extraction of teeth, opening of abscesses,etc. When a longer anesthesia is desired with this methodthe face piece may be reapplied before complete conscious-ness returns. If the operation be elsewhere than in themouth one breath of air should be administered after everyfour or five breaths of rebreathed N20. This will give alonger period of available anaesthesia, but does not resultin anything like the smooth anaesthesia offered by the addi-tion of oxygen gas to the mixture. The authors clamp and cylinder holder consist of 210 ANAESTHESIA two parts; the cyl
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanesthe, bookyear1919
