Imaging of the Eustachian tube by endoluminal use of an IVUS catheter

Introduction Multiplanar imaging of the Eustachian tube (ET) provides options for visualization of its course between the nasopharynx and middle ear and, depending on resolution, of space-occupying lesions or other topographic changes. Ultrasound offers good visualization of soft tissues and is already established as intravascular ultrasound (IVUS) in vascular diagnostics of fine-tissue pathological changes. In this first study, the feasibility of this technique is tested and a first analysis of the generated imaging is performed using a volume data set.

Methods ET’s of black face sheep were investigated using an IVUS technique. Different catheters were used, which allowed imaging of the ET under different parameters (empty measurement, placement of a stenosis with hyaluronic acid without/with contrast enhancer, after stenting).

Results Catheter diagnostics with IVUS does not pose a technical challenge during application; the existing automated retraction technique provides a coherent and quantitatively evaluable data set. Catheter-induced injury to the mucosa or via falsa were not detected. Soft tissue imaging was possible with good coupling of the transducer element. Correlates of stenosis or stents could be visualized.

Conclusions IVUS in ET is a feasible imaging technique, which - in line with ultrasound technology - is a gentle, non-invasive procedure. To what extent clinical significance is possible remains to be evaluated in further studies.

Die Studie wurde unterstützt durch Volcano Europe BV, Belgien. / The study was supported by Volcano Europe BV, Belgium.

Publication History

Article published online:
24 May 2022