Japar@Jaafar, Rohaizam
(2015)
Imaging profile of the ear in hearing loss patients in Hospital Universiti Sains Malaysia.
Masters thesis, Universiti Sains Malaysia.
Abstract
Introduction:
Hearing impairment is a major disability. The otologic assessments together
with high-resolution CT images were able to obtain precise diagnostic profile
of ear malformations. These details are essential for further management of
patients.
Objective:
This study was conducted to investigate the detailed anatomical profile of the
ears in hearing loss patient in Hospital Universiti Sains Malaysia by highresolution
CT scan of the temporal bone.
Methodology:
This was a cross-sectional study of high resolution CT scans of temporal bone
from 1st January 2008 to 31st May 2014 in HUSM. The study sample
consisted of all patients with hearing loss who had undergone HRCT in
HUSM and fulfilled the study criteria.
Results:
In this study, which consisted of 55 patients, 40% of patients showed some
form of abnormality on the HRCT temporal bone with 36.4% with outer ear
abnormality, 9.0% had middle ear abnormality, 40.1% noted to have inner ear
abnormality and 13.6% with multiple areas of abnormality. In term of
laterality, 54.5% were observed to have bilateral diseases, 27.3% on right ear
and the remaining 18.2% had it on the left ear. The mean vestibular aqueduct
diameter was 0.08 ± 0.09 cm (R) and 0.06 ± 0.04 cm (L), lateral semicircular
canal diameter 0.10 ± 0.03 cm (R) and 0.10 ± 0.02 cm (L), vestibule diameter
0.30 ± 0.06 cm (R) and 0.31 ± 0.05 cm (L), bone width between the lateral
vestibular wall and the inner wall of the lateral semicircular canal diameter
0.35 ± 0.07 cm (R) and (L) and internal acoustic meatus diameter 0.40 ± 0.08
cm (R) and 0.41 ± 0.08 cm (L). Patients with external ear abnormality were
observed to have normal to severe hearing loss, patients with middle ear
abnormality had mild to severe hearing loss and patients with inner ear
abnormality had normal to profound hearing loss. The most common inner ear
abnormalities in this study were enlarged vestibular aqueduct and cochlear
ossifications.
Conclusion:
This study showed that HRCT temporal bone could detect ear abnormality up
to 40% of patients with hearing loss and most common abnormality would be
enlarged vestibular aqueduct and cochlear ossification. The severity of hearing
loss was higher in patients with inner ear abnormality.
Actions (login required)
 |
View Item |
![[img]](http://eprints.usm.my/style/images/fileicons/application_pdf.png)
