METHODS article
Front. Surg.
Sec. Otorhinolaryngology - Head and Neck Surgery
Post-operative radiological evaluation of a bilateral hypoglossal nerve stimulation system
Bielefeld University, Bielefeld, Germany
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Abstract
Introduction Hypoglossus stimulation implants are a second-line option for the treatment of obstructive sleep apnea (OSA). Similar to other implants, postoperative positional evaluation serves as a quality control measure for the surgical procedure and as a reference for future adjustments. Furthermore, the impact of artifacts on the assessment of the adjacent structures might be of clinical importance. This study aimed to evaluate postoperative radiological positional implant control and artifacts of a bilateral hypoglossal nerve stimulation device. Material and methods We retrospectively evaluated radiological imaging of 11 patients on the first day after implantation of a bilateral nervus hypoglossus stimulation device. A variety of radiological imaging procedures were utilized: 8 CT scans (in sagittal and axial planes) and 11 X-ray examinations. Radiological imaging was analyzed regarding the position of the implant, anatomy, and artifacts. The age range of patients varied from 59 to 87 years (mean 69.1 years; SD 9.1 years). Results Evaluation of X-ray images did not reveal artifacts that affected the diagnostic accuracy of postoperative position control. In contrast, CT images showed artifacts in the coronal, sagittal, and axial planes, making radiological assessment more difficult. We observed a variation of device position without any effect on functionality. Defined paddle symmetry was found in 8 out of 11 cases. Conclusion Postoperative radiologic monitoring of a bilateral hypoglossal nerve stimulator is recommended. A variation of device position could be found.
Summary
Keywords
computed tomography, Hypoglossal nerve stimulation, obstructive sleep apnea, radiological artifacts, x-ray imaging
Received
26 February 2026
Accepted
08 July 2026
Copyright
© 2026 Kilgue. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
*Correspondence: Alexander Kilgue
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