A text-book of the diseases of the ear and adjacent organs . catrix is not apparent, and when in addition the cicatricialtissue extending in front of the ost. tymp. tubas is ruptured so thatthe air can freely pass from the Eustachian tube into the external 382 CHRONIC PURULENT INFLAMMATION OF THE MIDDLE EAR. meatus. This causes the non-adherent portions to remain im-movable when air enters the tympanic cavity. In larger defects ofthe membrane often only some portion of the posterior (Fig. 212),lower or anterior remnant of the membrane is fastened to the innerwall of the tympanic cavity by mean
A text-book of the diseases of the ear and adjacent organs . catrix is not apparent, and when in addition the cicatricialtissue extending in front of the ost. tymp. tubas is ruptured so thatthe air can freely pass from the Eustachian tube into the external 382 CHRONIC PURULENT INFLAMMATION OF THE MIDDLE EAR. meatus. This causes the non-adherent portions to remain im-movable when air enters the tympanic cavity. In larger defects ofthe membrane often only some portion of the posterior (Fig. 212),lower or anterior remnant of the membrane is fastened to the innerwall of the tympanic cavity by means of cicatricial tissue, and thediagnosis of such cases is usually not difficult. Of special interest are those partial cicatrices which extend fromthe anterior margin of the perforation to the inner wall of thetympanum, and form a partition between the ost. tymp. tubae andthe tympanic cavity. The diagnosis of such membranous septacan only be made with certainty if (Fig. 213) the deep-seated,darkish-gray cicatrix can be seen through the perforation bulging.
Size: 1412px × 1770px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjecteardiseases, bookyear
