Cochlear implant insertion forces in microdissected human cochlea to evaluate a prototype array.
Cochlear implant array insertion forces are potentially related to cochlear trauma. We compared these forces between a standard (Digisonic SP; Neurelec, Vallauris, France) and an array prototype (Neurelec) with a smaller diameter. The arrays were inserted by a mechatronic tool in 23 dissected human cochlea specimens exposing the basilar membrane. The array progression under the basilar membrane was filmed together with dynamic force measurements. Insertion force profiles and depth of insertion were compared. The recordings showed lower insertion forces beyond 270° of insertion and deeper insertions with the thin prototype array. This will potentially allow larger cochlear coverage with less trauma.
University Paris Diderot, Paris, France.
Yann
Y
Nguyen
Mathieu
M
Miroir
Guillaume
G
Kazmitcheff
Jasmine
J
Sutter
Morad
M
Bensidhoum
Evelyne
E
Ferrary
Olivier
O
Sterkers
Alexis
A
Bozorg Grayeli
D001489:Basilar Membrane / Q000293:injuries / Q000502:physiology / Q000601:surgery; D002138:Calibration; D003051:Cochlea / Q000293:injuries* / Q000502:physiology / Q000601:surgery*; D019929:Cochlear Implantation / Q000009:adverse effects* / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D066298:In Vitro Techniques; D042282:Microdissection; D008954:Models, Biological; D012371:Robotics / Q000295:instrumentation / Q000379:methods; D012405:Round Window, Ear / Q000293:injuries / Q000502:physiology / Q000601:surgery; D012533:Scala Tympani / Q000293:injuries / Q000502:physiology / Q000601:surgery; D013314:Stress, Mechanical; D013701:Temporal Bone / Q000293:injuries / Q000502:physiology / Q000601:surgery; D014015:Tissue Banks