A practical treatise on the diseases of the ear including the anatomy of the organ . usand a comparatively large opening in the membrana tympani * Archiv fur Ohrenheilkunde, Bd. IV., p. 8. f Transactions of the American Otological Society, 1872, p. 83. MIDDLE EAR MD3E0E. 399 must exist, to permit of the introduction of a mirror of suffi-cient size. The instrument was first constructed to accuratelydetermine the origin of a growth which was external to themembrana tympani, but which was hidden from view by theconformation of the external auditory canal. The mirror is attached to Webers tenotome
A practical treatise on the diseases of the ear including the anatomy of the organ . usand a comparatively large opening in the membrana tympani * Archiv fur Ohrenheilkunde, Bd. IV., p. 8. f Transactions of the American Otological Society, 1872, p. 83. MIDDLE EAR MD3E0E. 399 must exist, to permit of the introduction of a mirror of suffi-cient size. The instrument was first constructed to accuratelydetermine the origin of a growth which was external to themembrana tympani, but which was hidden from view by theconformation of the external auditory canal. The mirror is attached to Webers tenotome, the cutting-hook being replaced by a polished steel mirror of from one-sixteenth to one-eighth of an inch in diameter. In some casesDr. Blake thinks a larger mirror may be used. The mirroris made by flattening out the end of the shaft, bending itat the proper angle, tempering and polishing it. The shaft isductile, so that the angle of the mirror can be varied at of various lengths, with mirrors of various sizes, maybe rotated by movement of the stud in the handle. *. Blakes Middle Ear Mirror. For the benefit of the student and young practitioner, wemay formulate our knowledge of aural polypi as follows : I.—True aural polypi are morbid growths analogous toexuberant granulations. * Messrs. Otto & Reynolds, of this city, have greatly improved Weberstenotome and Blakes middle ear mirror, by placing the tenotome and mirrorin a slit canula, so that no unscrewing is needed to remove them. 400 EXOSTOSES. II.—They are the result of a long-continued, or recent andviolent purulent inflammation of the cavity of the tympanumor external auditory canal—usually of the former. III.—Their removal is but the beginning of a treatment ofthe disease of which they are consequences and symptoms. IY.—The hearing power of the patient will not be restored,although usually improved by the removal of an aural polypus. V.—Malignant growths occur in the ear, which assume theform of
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