Bildgebende Diagnostik des Innenohrs vor Cochleaimplantation

Abstract

If sufficient speech understanding can no longer be achieved with conventional hearing aids, the indication for a cochlear implant is very often present. Imaging plays an important preoperative role, as it is the only way to decide whether a cochlear implant is possible or not. The preoperative evaluation of the temporal bone for the precise selection of the candidates for cochlear implant is including CT (Computed Tomography) and MRI (Magnetic Resonance Imaging).

Wenn mit herkömmlichen Hörgeräten kein ausreichendes Sprachverstehen mehr erzielt werden kann, ist sehr oft eine Cochleaimplantation indiziert. Präoperativ spielt dabei die bildgebende Diagnostik eine wesentliche Rolle, weil nur so entschieden werden kann, ob ein Cochleaimplantat möglich ist oder nicht.

Schlüsselwörter

Cochleaimplantat - Bildgebung - Mittelohrfehlbildung - Länge der Cochlea - Innenohrfehlbildung

Key words

cochlear length - inner ear malformation

• Literatur

• 1 Walby AP. Scala tympani measurement. Ann Otol Rhinol Laryngol 1985; 94 (04) 393-397
• 2 Ariyasu L, Galey FR, Hilsinger R. et al Computer-generated three-dimensional reconstruction of the cochlea. Otolaryngol Head Neck Surg 1989; 100: 87-91 . doi:10.1177/019459988910000201
• 3 Adunka O, Unkelbach MH, Mack MG. et al Predicting basal cochlear length for electric-acoustic stimulation. Arch Otolaryngol Head Neck Surg 2005; 13: 488-492 . doi:10.1001/archotol.131.6.488
• 4 Kawano A, Seldon HL, Clark GM. Computer-aided three-dimensional reconstruction in human cochlear maps: measurement of the lengths of organ of Corti, outer wall, inner wall, and Rosenthalʼs canal. Ann Otol Rhinol Laryngol 1996; 105: 701-709 . doi:10.1177/000348949610500906
• 5 Miller JD. Sex differences in the length of the organ of Corti in humans. J Acoust Soc Am 2007; 121: EL151-EL155
• 6 Rivas A, Cakir A, Hunter JB. et al Automatic Cochlear Duct Length Estimation for Selection of Cochlear Implant Electrode Arrays. Otol Neurotol 2017; 38: 339-346 . doi:10.1097/MAO.0000000000001329
• 7 Koch RW, Ladak HM, Elfarnawany M. et al Measuring Cochlear Duct Length – a historical analysis of methods and results. J Otolaryngol Head Neck Surg 2017; 46: 19 . doi:10.1186/s40463-017-0194-2
• 8 Alexiades G, Dhanasingh A, Jolly C. Method to estimate the complete and two-turn cochlear duct length. Otol Neurotol 2015; 36: 904-907 . doi:10.1097/MAO.0000000000000620
• 9 Sennaroğlu L, Bajin MD. Classification and Current Management of Inner Ear Malformations. Balkan Med J 2015; 36: 904-907 . doi:10.4274/balkanmedj.2017.0367
• 10 Rosahl S, Bohr C, Lell M. et al Diagnostik und Therapie des Vestibularisschwannoms – eine interdisziplinäre Herausforderung. Laryngorhinootologie 2017; 96: S152-S182 . doi:10.1055/s-0042-122386