Abstract
Balloon dilatation of the Eustachian tube (BET) is a surgical treatment method for
Eustachian tube dysfunction (ETD), which relieves the symptoms in the majority of
cases. However, there are potential intraoperative risks associated with BET; the
decision-making process with regard to indications for BET is not standardized up
to date. The objective of this study was to review the role of computed tomography
(CT) and magnetic resonance imaging (MRI) in the preoperative planning of BET. The
literature review is based on a database search performed in August 2022.
BET is classified into transtympanic and nasopharyngeal. CT of the temporal bone provides
good visualization of the site of obstruction, which allows to choose the adequate
approach. Transtympanic approach is associated with risks of internal carotid artery
damage due to possible carotid canal anomalies. This risk can be prevented with preoperative
CT scan of the temporal bone. In case of nasopharyngeal BET, there is no sufficient
data considering risks of possible artery damage, although CT can provide accurate
measurements of ET. MRI is useful for differential diagnosis of conditions imitating
ETD, such as endolymphatic hydrops and nasopharyngeal carcinoma. Thus, it is feasible
to perform CT and MRI before BET to personalize the management of ETD patients.
Keywords
balloon dilation - CT - Eustachian tube - Eustachian tube dysfunction - MRI
