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Full text of "Diseases Of The Nose Throat And Ear"

ACUTE MASTOIDITIS

Fig. 172. Schwartze's operation for acute rnastoiditis. A, Subperiosteal abscess over right mastoi
Line of incision. The dotted line indicates a second incision which may have to be made in cases in v
the sinus is to be exposed: C, Area of operation exposed: 1, Posterior root of zygoma; 2, Supram
spine; 3, Tip of mastoid process. The area of operation lies within the triangle made by joining
three points. D, Mastoid antrum opened: 1, Mastoid antrum; 2, Air cells at the tip; 3, Sinus i
The gouge is shown in the position for removal of bone to expose the sinus. E, Removal of t
mastoid. F, The operation completed: 1, Dura of middle fossa exposed; 2, Posterior belly of dig*
muscle exposed by removal of mastoid lip; 3, Exposure of sigmoid sinus.