. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. of the drum-membraneon inflation usually broadens thecavity, and the level of the fluidsinks even if none has been ex-pelled ; while the correspondingincrease in the thickness of thestratum of fluid modifies its tint asseen through the drum-head. Sie-gles pneumatic speculum may alsogive aid in a diagnosis that is notalways easy even with a transpa-rent membrane, and is especiallyuseful in case of impermeability ofthe Eustachian tube. Opacities or FlG- —Larg
. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. of the drum-membraneon inflation usually broadens thecavity, and the level of the fluidsinks even if none has been ex-pelled ; while the correspondingincrease in the thickness of thestratum of fluid modifies its tint asseen through the drum-head. Sie-gles pneumatic speculum may alsogive aid in a diagnosis that is notalways easy even with a transpa-rent membrane, and is especiallyuseful in case of impermeability ofthe Eustachian tube. Opacities or FlG- —Large cjoiiec-other abnormalities of the drum-head may conceal an exudation be-hind it, and may at times simulateits presence, as in the case illus-trated in Fig. 4194, which was seenin Dr. Spears clinic. The effect of disturbance of theventilation of the tympanum andlack of equalization of the pneumatic pressure uponthe two sides of the drum-head, is apt to be markedlymanifest in the chronic dry catarrh. The air withinthe tympanic cavity is absorbed through osmosis, and in the middle of an acutecoryza. Cure by tion of Fluid in the LeftTympanum. The sur-face is visible only infront of the manubri-um. From a man withchronic naso - pharyn-geal catarrh. Exudateremoved hy paracentesisof the drum.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmedicine, bookyear188
