Zum Risiko vestibulärer Schäden nach Cochlea-Implantation

Cochlear implantation is a standardized secure procedure for more than 15 years for the care of deaf patients.During insertion of the electrodes into the cochlear there is not only the risk of destruction of the remaining function of auditory hair cells but as well of damage to labyrintal structures. Generally and in case of an existing contralateral damage respectively incomplete central compensation this could lead to persisting vertigo and result in considerable limitation to the quality of life for the patient.The vestibular function of 48 out of 111 patients who became deaf pre- resp. postlingual and were being cochlear implanted unilateraly between 01/97 and 09/2001 have been examined. A testing of bithermal caloric irrigation and rotational chair- generated sinusoidal harmonic acceleration were performed pre- as well as at least 3 months post-opartively with computererized video-oculographic registration (partly also under electro-nystagmographic registration or with frenzel glasses). 14 of those patients received an additional testing of the macula function with excentric rotation and off vertical axis rotation. A standadized history regarding vertigo was taken of all patients. In 9 of 37 cases (24%) where pre-opartively the vestibular function had been intact the cochlea impantation resulted in a lesion of the crista on the side of the operation. In one of these cases (3%) vertigo persisted as a result of a lack of central compensation. 2 of 14 (14%) examined patients experienced an isolated damage of the macula.A pre-operative testing of the crista as well as the macula function is usefull. It enables giving detailled information to the paient regarding possible vestibular post-operative symptoms. Furthermore the risk of post-operative problemes with the balance can be reduced by considering the vestibular findings regarding the choice of the side beeing implanted. Regarding the bilateral cochlear implantation pre-operative testing of the vestibular function and particularly of the ability of compensation as well as a separate bilateral implantation with a preserved vestibular function on the firstly implanted side can minimize the risk of persisting vertigo. In case a unilateral vestibular deficit is already existing on the firstly implanted side a bilateral cochlea implantation has to be strictly indicated.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2005

Author dc:creator

• Sanders, Marion

Contributors dc:contributor

• Westhofen, Martin

• info:eu-repo/classification/ddc/610
• Medizin
• Cochlea Implantation
• Schwindel
• Bogengangsfunktion
• Otolithenfunktion
• Cochlear Implant
• Dizziness
• Vertigo
• Macula function
• Crista function

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

ger

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-114449%22

OAI record oai:identifier

https://publications.rwth-aachen.de/oai2d?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Apublications.rwth-aachen.de%3A52212