. Anaesthetics : their uses and administration. n-ducted in the manner alreadydescribed in the case of etherinfusion. Dr. Mennell em-ploys the internal saphenousvein where it passes over themalleolus. The phenomena of induc-tion are : drowsiness withyawning appears in aboutone minute, there is usuallyno struggling ; completemuscular relaxation and chindrop occur, the latter callingfor care lest the tongue fallback, so impeding required.—40 required to anaesthetisea child of 10 months, i,ooo a heavily built man of25 years. When anaesthesiahas been induced, th
. Anaesthetics : their uses and administration. n-ducted in the manner alreadydescribed in the case of etherinfusion. Dr. Mennell em-ploys the internal saphenousvein where it passes over themalleolus. The phenomena of induc-tion are : drowsiness withyawning appears in aboutone minute, there is usuallyno struggling ; completemuscular relaxation and chindrop occur, the latter callingfor care lest the tongue fallback, so impeding required.—40 required to anaesthetisea child of 10 months, i,ooo a heavily built man of25 years. When anaesthesiahas been induced, the amountof solution is cut down to aslow dropping, but the ratevaries in each case, and hasto be gauged by Mennell gives 30 to 60drops per minute as an aver-age. Less than 10 per minuteallows effects.—Mr. Page points out as possibledangers the onset of cyanosis, and Federoff records someinstances of temporary cessation of respiration. There isdanger of vomitus or blood entering the air-ways during the. Fig. 43. — Mr. Pages hedonal infusionapparatus. ETHER. 187 post-operation profound sleep, since this coma may last for6 to 12 hours. In a few cases emotional manifestationsoccurred ; in some headache. In three cases there wassome local thrombosis. No haemolysis was observed. Contra-indications.—The method seems unsuited in casesin. which pulmonary engorgement or gross cardiac lesionsexists, in operations on the air passages, in cases with highblood pressure. The preliminary use of morphine or scopolamine appearsa doubtful advantage, since, although it lessens the necessityfor giving so much hedonal, it increases the danger of thepost-operation sleep period. ]\Ir. Page suggests giving 3 hedonal about two hours before infusion, restricting itsuse, however, to the strong and physically fit. Some fatalities have been reported occurring after the useof hedonal infusion, but although possibly discouraging theydo not lessen the value
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