Download 13th International Conference on Cochlear Implants and Other

yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Auditory system wikipedia, lookup

Audiology and hearing health professionals in developed and developing countries wikipedia, lookup

Earplug wikipedia, lookup

Olivocochlear system wikipedia, lookup

Dysprosody wikipedia, lookup

Sensorineural hearing loss wikipedia, lookup

Noise-induced hearing loss wikipedia, lookup

Hearing loss wikipedia, lookup

Speech perception wikipedia, lookup

Telecommunications relay service wikipedia, lookup

CI surgical technique and post-op auditory benefit for cases with cochlear ossification
Zhang D.
Affiliated Beijing Friendship Hospital of Capital Medical University, Beijing, China
Objective: To research surgical technique for cases with cochlear ossification and to summarize surgical
approaches for successful operation.
Method: Basing on result of pre-op temporal bone CT, 79 cases diagnosed with cochlear ossification were
classified into following 4 groups: ossification in round window, ossification in basal turn, ossification in 1/2 to 3/4
turn, ossification more than 3/4 turn. 3 surgical approaches were determined for 4 groups because same surgical
approach was applied for group 2 and 3.
Results: 79 cochlear ossification cases were confirmed among 3175 CI cases. For further detail, 21 cases were
confirmed as group 1, and 41 cases as group 2, 13 cases as group 3 and 4 cases as group 4. Electrode arrays
were inserted successfully for all 79 cases. Regarding to surgical approaches, approach 1 was applied for group
1, approach 2 for group 2 and 3, and approach 3 for group 4. After activation, electric-stimulating hearing was
obtained for 74 cases via surgical approach 1 and 2. Average hearing threshold with CI in speech frequency was
35dBHL, while score of Mandarin speech recognition test 3 months after activation was achieved as 100% for
mono-syllable rime and 91% for mono-syllable onset. 4 cases were conducted with approach 3; Average hearing
threshold with CI in speech frequency was 70dBHL, while score of Mandarin speech recognition test 3 months
after activation was achieved as 70% for mono-syllable rime and 30% for mono-syllable onset. One of those 4
cases was confirmed as modiolus ossification, score of this case was 50% for mono-syllable rime and 0% for
mono-syllable onset.
Conclusion: Key surgical technique for cochlear ossification case was preventing injury to modiolus. Speech
test score of case with cochlear ossification within 3/4 turn was equal to average score of all CI cases. Surgical
approach for case with whole cochlear ossification was complicated and auditory benefit post-op was not
Key words: Cochlear Implantation, Surgical approach, Ossification