CC BY-NC-ND 4.0 · Laryngorhinootologie 2020; 99(S 02): S272
DOI: 10.1055/s-0040-1711137
Abstracts
Otology

Assessment of the vestibular aqueduct in cone beam computed tomography in the context of diagnostics before cochlear implantation - is it worthwhile to take a closer look?

W Pethe
1   AMEOS Klinikum Halberstadt, Hals-Nasen-Ohrenklinik Halberstadt
,
Jörg Langer
1   AMEOS Klinikum Halberstadt, Hals-Nasen-Ohrenklinik Halberstadt
› Author Affiliations
 

Due to the enormous improvement in imaging, it has become possible in recent years to examine and assess even the finest, especially bony, structures of the inner ear. The large vestibular aqueduct syndrome (LVAS) is defined by a widened vestibular aqueduct and can be seen alone or associated with a variety of other malformations of the vestibular system. Clinically, a proportion of patients have a progressive hearing loss.

As part of the preparation for a possible cochlear implantation (CI), Cone beam computed tomography of the petrous bone was completed by 104 patients in 2018. These images were retrospectively reviewed for a malformation of the vestibular aqueduct (VA). For this purpose, the largest width at the middle of the VA - aqueduct midpoint width (AMW) - was measured and a width > 1.0 mm was considered pathological. The results were compared with the operation reports.

In 5 patients and 8 ears, the AMW was considered pathologically too wide. 4 patients were subsequently treated with an extended aqueduct with a CI in one ear. In no case did a Gusher phenomenon occur. There was no change in the surgical procedure due to the diagnosis.

Assessment of the vestibular aqueduct probably allows allocation to a radiologically traceable malformation in some of the patients with progressive, recent high-grade deafness. A surgical consequence seems to have it only in the fewest cases.

Poster-PDF A-1349.PDF



Publication History

Article published online:
10 June 2020

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