The ear : its anatomy, physiology, and diseases : a practical treatise for the use of medical students and practitioners / by Charles H. Burnett.

  • Burnett, Charles H. (Charles Henry), 1842-1902.
Date:
1877
Catalogue details

Licence: Public Domain Mark

Credit: The ear : its anatomy, physiology, and diseases : a practical treatise for the use of medical students and practitioners / by Charles H. Burnett. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    MIDDLE EAR. temporal ridge be extended posteriorly, until it intersects a perpendicular drawn tlirou^li the mastoid tip, the angle lying between these lines on the side Fig. 87. towards the ])orus acusticus ex- ternus will indicate the position for the insertion of the point of the perforator. A few turns of the jiyraniidal borer, in a direc- tion inward, forward, and slight- ly upward, will usually be suffi- cient to perforate the mastoid wall, the average thickness of which at the point indicated is about one-fifth of an inch (Buck). The opening thus made may be further and definitely enlarged by the use of a bit, as represented in Fig, 87. Retrac- tors, which are made of steel, will be found of service in hold- the edges of the incision out of the way of the operator. They are, of course, to be intrusted to a careful assistant. After the CoMicAr. Drill and Bits for Perfo- niastoid Cclls are thuS CXpOSCd, RATINQ THE MASTOID PollTION OF THE ill l Temporal Bone. (A. H. Buck.) they may be brokcu Up by meaus of a firm probe, and the antrum mastoideum thus reached. Schwartze prefers the gouge to all other implements for perforating the mastoid wall. Such an instrument may be of value in hyperostosis of the mastoid cells and outer wall, for, as Dr. Schwartze shows, by its employment the cells may be bared and even the mastoid antrum reached, by the successive removal of layers from the mastoid table. Although the pain may have been intense and unyielding, and the general symptoms of the patient strongly indicative of cerebral complication, the perforation of the outer mastoid wall may not give vent to pus, but to the reddish, pulpy matter spoken of by A. H. Buck. The operation, however, gives the desired relief, and, in every probability, has cut short a process which would have rapidly advanced to suppuration, with all