Importance of CT imaging in pediatric cochlear implantation: Emphasis the significance of the BCNC width.
Journal
Current Pediatric Research International Journal of Pediatrics
Date Issued
2022-07-27
Author(s)
Abstract
Introduction: Cochlear Implantation (CI), in the past more than 30 years, has become a standard of
care for children with profound sensorineural hearing loss. As it became a routine intervention,
requests for pre-op images have increased in the work-up for candidates. The optimal protocol for
radio-diagnostics has not yet been defined. CT and MRI are complementary methods and both being
used for this purpose. An absent cochlear nerve (CN) is the only absolute contraindication to cochlear
implantation and MRI is a gold standard for CN detection. Some authors have reported the
relationship between cochlear bony nerve canal (BCNC) stenosis and CN hypoplasia and aplasia.
Objectives: The aim of this study was to stress out the importance of CT by evaluating the width of the
bony cochlear nerve canal (BCNC) in children with congenital sensorineural hearing loss (SNHL) and
“normal" findings on thin section temporal bone CT.
Materials and methods: The width of the BCNC was retrospectively evaluated in two groups of
patients. The study group included 11 children with congenital, bilateral SNHL who underwent
cochlear implantation from July to December 2019. Eleven children aged 3-10 years, with no
sensorineural hearing loss were taken as controls. Axial sections of their CT scans were used to
measure the width of the BCNC.
Results: From the obtained results, the width of the BCNC in children with bilateral, profound
sensorineural hearing impairment range from 1.0 to 2.3 mm with mean value of 1.5 ± 0.3 mm and is
significantly smaller than in the control group.
care for children with profound sensorineural hearing loss. As it became a routine intervention,
requests for pre-op images have increased in the work-up for candidates. The optimal protocol for
radio-diagnostics has not yet been defined. CT and MRI are complementary methods and both being
used for this purpose. An absent cochlear nerve (CN) is the only absolute contraindication to cochlear
implantation and MRI is a gold standard for CN detection. Some authors have reported the
relationship between cochlear bony nerve canal (BCNC) stenosis and CN hypoplasia and aplasia.
Objectives: The aim of this study was to stress out the importance of CT by evaluating the width of the
bony cochlear nerve canal (BCNC) in children with congenital sensorineural hearing loss (SNHL) and
“normal" findings on thin section temporal bone CT.
Materials and methods: The width of the BCNC was retrospectively evaluated in two groups of
patients. The study group included 11 children with congenital, bilateral SNHL who underwent
cochlear implantation from July to December 2019. Eleven children aged 3-10 years, with no
sensorineural hearing loss were taken as controls. Axial sections of their CT scans were used to
measure the width of the BCNC.
Results: From the obtained results, the width of the BCNC in children with bilateral, profound
sensorineural hearing impairment range from 1.0 to 2.3 mm with mean value of 1.5 ± 0.3 mm and is
significantly smaller than in the control group.
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