IMAGING OF INNER EAR MALFORMATION IN COCHLEAR IMPLANT

Duy Chung Lê1,, Minh Thành Cao1
1 Hanoi medical university hospital

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Abstract

Objective: To describe CT scanner and MRI imaging of inner ear malformation in cochlear implant. Material and Methods: inner ear malformation and cochlear nerve deficency was evaluated on high resolution CT scanner and high resolution T2 3D gradient-echo MRI. Results: 166 patients with 332 ears, including 170 ears with inner ear malformation or cochlear nerve deficency. The cochlear size of cochlear hypoplasia, Incomplete partition Type II, Incomplete partition Type III, vestibular - semicircular canal abnormality, normal cochlear and cochlear nerve deficency are smaller than no inner ear malformation group. The inner ear malformations have 55,3% hypoplasia or aplasia of modiolus, 35,3% have aplasia or hypoplasia of the round window. Conclusion: Inner ear malformations with diverse cochlear shapes and sizes affect the cochlear implant indications; High rates of hypoplasia, aplasia modiolus and hypoplasia, aplasia round window are factors that cause difficulties and complications for surgery.

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References

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