Physiology of the Ear
2 Physiology of the Ear 2.1 External Ear • The tympanic membrane (TM) outer layer is keratinizing squamous epithelium • Superficial cells are shed and cleared from the centre of…
Middle Cranial Fossa Approach
19 Middle Cranial Fossa Approach Definition Following an approximately 4×4cm craniotomy and retraction of the dura of the temporal lobe, exposure of the superior surface of the petrous bone and…
Infratemporal Fossa “Type A” Approach
23 Infratemporal Fossa “Type A” Approach Definition Following a subtotal petrosectomy, permanent anterior transposition of the facial nerve, and performing procedures on the structures located medial to the facial canal….
Transotic Approach
29 Transotic Approach Definition Following a subtotal petrosectomy, extirpation of the entire labyrinth, including the cochlea, leaving the tympanic and mastoid segments of the facial nerve covered with a thin…
Translabyrinthine Approach
20 Translabyrinthine Approach Definition Following the extended cortical mastoidectomy and exenteration of the posterior part of the labyrinth, exposure of the internal auditory canal, and cerebellopontine angle through the posterior…
Cortical Mastoidectomy
II Surgical Techniques 5 Cortical Mastoidectomy 6 Posterior Tympanotomy 7 Cochlear Implantation 8 Transcortical Exposure of the Epitympanum 9 Extended Cortical Mastoidectomy 10 Canalplasty 11 Antrotomy 12 Tympanoplasty 13 Stapedotomy…
Extended Radical Mastoidectomy
27 Extended Radical Mastoidectomy Definition Enlargement of the radical mastoidectomy with complete skeletonization of all of the neighboring structures and the semicircular canals. There is no specific classification for this…
Instrumentation and Usage
4 Instrumentation and Usage Microscope The microscope and drill have played a major role in refining otologic and neurotologic techniques. In temporal bone surgery, good control of the microscope is…
Postauricular Facial Nerve Decompression
22 Postauricular Facial Nerve Decompression Definition Following a cortical mastoidectomy, exposure and decompression of the tympanic and mastoid segments of the facial nerve. It is also called transmastoid facial nerve…
