FIELD: medicine.
SUBSTANCE: method involves performing transcranial atticotympanotomy, removing a pyramid and a bone block above an anterior wall of descending facial canal up to a perineurium. The tympanic sinus is approached from a mastoid, from backside and in the medial direction of the descending facial canal. A triangle limited by the descending facial canal, by a portion of the lateral semicircular canal from backside at the top, by a portion of the posterior semicircular canal from backside at the bottom, is drilled at the front in the anteriomedial direction.
EFFECT: method provides a good view of the difficult-to-access middle ear, avoids facial nerve injuries and vestibule penetration.
1 ex, 6 dwg
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