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- Title
Cochlear implant: what the radiologist should know.
- Authors
Gomes, Natália Delage; Batista Couto, Caroline Laurita; Gaiotti, Juliana Oggioni; Doffémond Costa, Ana Maria; Ribeiro, Marcelo Almeida; Caldeira Diniz, Renata Lopes Furletti
- Abstract
Cochlear implant is the method of choice in the treatment of deep sensorineural hypoacusis, particularly in patients where conventional amplification devices do not imply noticeable clinical improvement. Imaging findings are crucial in the indication or contraindication for such surgical procedure. In the assessment of the temporal bone, radiologists should be familiar with relative or absolute contraindication factors, as well as with factors that might significantly complicate the implantation. Some criteria such as cochlear nerve aplasia, labyrinthine and/or cochlear aplasia are still considered as absolute contraindications, in spite of studies bringing such criteria into question. Cochlear dysplasias constitute relative contraindications, among them labyrinthitis ossificans is highlighted. Other alterations may be mentioned as complicating agents in the temporal bone assessment, namely, hypoplasia of the mastoid process, aberrant facial nerve, otomastoiditis, otosclerosis, dehiscent jugular bulb, enlarged endolymphatic duct and sac. The experienced radiologist assumes an important role in the evaluation of this condition.
- Subjects
COCHLEAR implants; TEMPORAL bone; MASTOID process; FACIAL nerve; OTOSCLEROSIS; ENDOLYMPHATIC duct
- Publication
Radiologia Brasileira, 2013, Vol 46, Issue 3, p163
- ISSN
0100-3984
- Publication type
Article
- DOI
10.1590/S0100-39842013000300010