A text-book of the diseases of the ear for students and practitioners . her, ethyl chloride, ethylic iodide, chloroform, turpentine, etc., a volatilizingapparatus is unnecessary. In the employment of such medicaments, the simplerubber bag as used for the air-douche answers the same purpose. The vapoursare collected by placing the nozzle of the air-bag, from which the air hasbeen expelled, into the mouth of the bottle containing the medicated fluid(not into the fluid), and gradually relaxing the pressure on the air-bag. The introduction of vapours into the middle ear is accompanied by a feeling
A text-book of the diseases of the ear for students and practitioners . her, ethyl chloride, ethylic iodide, chloroform, turpentine, etc., a volatilizingapparatus is unnecessary. In the employment of such medicaments, the simplerubber bag as used for the air-douche answers the same purpose. The vapoursare collected by placing the nozzle of the air-bag, from which the air hasbeen expelled, into the mouth of the bottle containing the medicated fluid(not into the fluid), and gradually relaxing the pressure on the air-bag. The introduction of vapours into the middle ear is accompanied by a feelingof warmth and fulness. Great burning or pain associated with injection ofthe vessels along the manubrium occurs most frequently after the action ofammonium vapours. The escape of the vapours into the naso-pharynx oftencauses great itching, hawking, coughing, congestion and swelling of the mucousmembrane, and increased secretion. It is now universally acknowledged that a smaller quantity of vapourintroduced through the catheter reaches the middle ear than was formerly. Fig. 81.—Apparatusfor- Chloride orAmmonia Vapour.(After Gomperz.) 106 DISEASES OF THE EAR supposed. This applies to steam, and to vapours impregnated with drugsand ammonium which are precipitated at the isthmus tubse when themucous membrane is greatly swollen. Large quantities, however, may reachthe tympanic cavity when the tube is permeable. On the other hand, thesubtle vapours of the various forms of ether, chloroform, and turpentine caneasily be propelled into the middle ear. Inflations of hot air recently made at the authors clinic by Dr. Alt bymeans of an apparatus invented by Gartner (to be had at Eeiner, Vienna)gave favourable results in catarrhs of the middle ear associated with markedswelling of the tube. The technic of bougieing the Eustachian tube will be discussed in thechapter on Stricture of the Eustachian Tube. 3. The Authors Method for effecting the Permeability ofthe Eustachian Tube. Politzers M
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