A text-book of the diseases of the ear and adjacent organs . ch is attached to a double balloon, are connected by means of short piecesof india-rubber tubing with two bent glass tubes, r, ?-, each of which carriesa perforated rubber stopper at its other extremity, these stoppers beingaccurately fitted into the glass tubes a, n. On pressing the double balloon, 112 INJECTION OF VAPOURS INTO THE MIDDLE EAR. vapours of hydrochloric acid and ammonia are forced into the lower sectionof the Y-shaped tube, where they unite to form sal-ammoniac vapour, whichbeing purified in its passage through the wat
A text-book of the diseases of the ear and adjacent organs . ch is attached to a double balloon, are connected by means of short piecesof india-rubber tubing with two bent glass tubes, r, ?-, each of which carriesa perforated rubber stopper at its other extremity, these stoppers beingaccurately fitted into the glass tubes a, n. On pressing the double balloon, 112 INJECTION OF VAPOURS INTO THE MIDDLE EAR. vapours of hydrochloric acid and ammonia are forced into the lower sectionof the Y-shaped tube, where they unite to form sal-ammoniac vapour, whichbeing purified in its passage through the water may now be conducted througha rubber tube, s, and catheter, c, into the cavum tyrnpani. In all the apparatus for the injection of vapours, the impregnated air leavesthe nozzle of the catheter with far less energy than is the case with theordinary air-douche. The pressure being thus so slight, the vapours can onlyreach the tympanic cavity provided the tube be permeable. In cases inwhich the tube is much swollen both the simple and double balloons will be. Fig. SO.—Apparatus for Chloride of Ammonium Vapour. insufficient as a compression apparatus, and recourse must be had to theforce-pump. Perforation of the membrana tyrnpani greatly facilitates theentrance of vapours into the middle ear. The temperature of the vapour will vary with the nature of the medica-ments employed, some of which volatilize at a low, others at a high, tempera-ture. The duration of the injection depends likewise on the nature of thedrugs employed and upon the amount of irritation which is developed duringthe action of the vapour in the ear or pharynx. Generally the time of theapplication varies from 3-10 minutes. When applying rapidly evaporating fluids such as sulphuric ether, acetic INJECTION OF VAPOURS INTO THE MIDDLE EAR. 113 ether, ethylic iodide, chloroform, turpentine, etc., a volatilization apparatus isnot required. In such cases the simple rubber balloon as used for the air-douche is sufficien
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecteardiseases, bookyear
