1997
DOI: 10.3109/00016489709117786
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Cochlear Implant Deep Electrode Insertion: Extent of Insertional Trauma

Abstract: We have recently undertaken deep insertions of the Combi-40 cochlear implant electrode (Med-E1 Corp., Innsbruck, Austria) into apical regions of the scala tympani using a cochleostomy approach. In order to examine the extent of the insertional trauma, 12 fresh human temporal bones were implanted with original Combi-40 electrodes. The specimens were histologically processed with the implants in place by employing a sawing and grinding technique. In most cases, only very discrete distortions of the epithelium of… Show more

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Cited by 98 publications
(63 citation statements)
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“…Delayed damage involves the functional loss of intracochlear structures and the host response resulting in inflammation, fibrosis, and new bone formation. These changes have been widely reported in histopathologic studies of postmortem cochlear implant recipients and in implanted cadaveric temporal bones (5,(19)(20)(21)(22)(23)(24).…”
Section: Discussionmentioning
confidence: 61%
See 1 more Smart Citation
“…Delayed damage involves the functional loss of intracochlear structures and the host response resulting in inflammation, fibrosis, and new bone formation. These changes have been widely reported in histopathologic studies of postmortem cochlear implant recipients and in implanted cadaveric temporal bones (5,(19)(20)(21)(22)(23)(24).…”
Section: Discussionmentioning
confidence: 61%
“…Common patterns of trauma to cochlear structures include destruction of the spiral ligament and organ of Corti, rupture of the basilar membrane and Reissner's membrane leading to electrode insertion into scala media or scala vestibuli, and fracture of the osseous spiral lamina (5,(19)(20)(21)(22)(23)(24). Insertional trauma to the ductus reuniens has been proposed as a mechanism to explain the high prevalence of cochlear hydrops and saccular collapse observed in the temporal bones of implant recipients (25).…”
Section: Discussionmentioning
confidence: 99%
“…Since then, the identification of greater numbers of AN/AD cases with severeto-profound hearing loss, the often poor speechperception performance of affected subjects, and limited success with conventional amplification has led many clinicians and patients to consider the cochlear implant management option. Despite the specific risks to cochlear structures during the procedure (O' Leary et al, 1991;Gstoettner et al, 1997) and outcome uncertainties related to cite of lesion variability, hundreds of children and adults around the world with AN/AD-type hearing loss have undergone the procedure.…”
Section: Cochlear Implantsmentioning
confidence: 99%
“…Trauma to the delicate structures of the inner ear frequently occurs during insertion of CI electrodes [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. This damage ranges from relatively minor displacement of the basilar membrane to severe fracture of the osseous spiral lamina, tearing of the basilar membrane or spiral ligament, and deviation of the electrode path from its intended location in the ST to the overlying scala media and/or scala vestibuli.…”
Section: Reduced Damagementioning
confidence: 99%