Korean J Otorhinolaryngol-Head Neck Surg.  2013 Feb;56(2):105-109. 10.3342/kjorl-hns.2013.56.2.105.

Delayed Electrode Extrusion after Cochlear Implant Repositioning

• An SY
• Oh SA
• Jung JY
• Suh MW

• KMID: 2277748
• DOI: http://doi.org/10.3342/kjorl-hns.2013.56.2.105

Abstract

It is well known that cochlear implant device repositioned in the posterosuperior direction will cause intracochlear electrode extrusion. We have recently repositioned a cochlear implant device due to infection and device exposure. The device repositioning was performed under C-arm assisted fluoroscopic monitoring. The exposed device was covered with a local scalp flap. During and immediately after the repositioning operation, electrodes seemed to be well positioned in place. Mapping and neural response imaging were performed 4 days after the operation, and the results were quite similar to the preoperative results. But when the same tests were performed one month after repositioning operation, we found that the number 15 and 16 electrodes were not responsive. The transorbital view also revealed a slight extrusion of the intracochlear electrode. In the present article, we discuss the possible cause of delayed electrode extrusion and its clinical implication.

Keyword

Cochlear implant; Extrusion; Repositioning; Surgical revision

MeSH Terms

Cochlear Implants
Electrodes
Hypogonadism
Mitochondrial Diseases
Ophthalmoplegia
Reoperation
Scalp
Hypogonadism
Mitochondrial Diseases
Ophthalmoplegia