Eustachian tube is closed. Lateral skull base Mastoidectomy, Stapes usually retained. neoplasms. intact wall retains modified radical: technique, with ossicles. Tympanic 41554 myringoplasty membrane is reconstructed and ossicular by tympanoplasty. chain reconstruction complete (canal wall up): removal of mastoid air cells, Mastoidectomy tegmen, sigmoid sinus, presigmoid dural plate, 41557 (radical or posterior wall of external modified radical) auditory canal. Posterior wall of external auditory Mastoidectomy canal is retained. (radical or 41560 modified radical) complete canal wall down: mastoidectomy plus removal and of posterior and superior myringoplasty osseous external auditory canal. Tympanic membrane Mastoidectomy reconstructed to separate the (radical or middle ear and mastoid modified cavity and ear canal. radical), 41563 With or without myringoplasty myringoplasty and/or ossiculoplasty. and ossicular chain reconstruction Mastoidectomy (radical or modified radical), obliterate 41564 mastoid cavity, blind sac closure of external auditory canal and obliterate Eustachian tube Revision of mastoidectomy (radical, 41566 modified radical or intact wall), including myringoplasty
Eustachian tube is closed. Stapes usually retained. modified radical: retains ossicles. Tympanic membrane is reconstructed by tympanoplasty. complete (canal wall up): removal of mastoid air cells, tegmen, sigmoid sinus, presigmoid dural plate, posterior wall of external auditory canal. Posterior wall of external auditory canal is retained. canal wall down: complete mastoidectomy plus removal of posterior and superior osseous external auditory canal. Tympanic membrane reconstructed to separate the middle ear and mastoid cavity and ear canal. With or without myringoplasty and/or ossiculoplasty. Lateral skull base neoplasms. 41554 Mastoidectomy, intact wall technique, with myringoplasty and ossicular chain reconstruction 41557 Mastoidectomy (radical or modified radical) 41560 Mastoidectomy (radical or modified radical) and myringoplasty 41563 Mastoidectomy (radical or modified radical), myringoplasty and ossicular chain reconstruction 41564 Mastoidectomy (radical or modified radical), obliterate mastoid cavity, blind sac closure of external auditory canal and obliterate Eustachian tube 41566 Revision of mastoidectomy (radical, modified radical or intact wall), including myringoplasty
1364-MEIConductive-FinalProtocol-accessible.docx