Graeme Clark Collection

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Author: Xu, Jin × End date: 1999 × Start date: 1990 × Subject: intracochlear × Subject: otology ×

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    Radiologic evaluation of multichannel intracochlear implant insertion depth
    Marsh, Michael A. ; XU, JIN ; Blamey, Peter J. ; Whitford, Lesley A. ; Xu, Shi-Ang ; Silverman, Julianna M. ; Clark, Graeme, M. ( 1993)
    Postoperative plain film x-rays are necessary in all multichannel cochlear implant patients to confirm intracochlear position, detect possible electrode kinking, and provide a reference if postoperative slippage occurs. In addition, precise documentation of multichannel intracochlear electrode insertion depths is necessary for comparison of speech recognition results among patients and may be of use for future speech processing strategies. In the present study, a method has been devised, using a modified Stenver's view, to more accurately document insertion depths of the electrode array and location of individual electrodes on 50 multichannel cochlear implant patients. Surgical estimates of insertion depth are shown to have great variability in regard to distance along the basilar membrane when compared with x-ray documentation. Additionally, there is preliminary evidence that insertion depth, as determined by x-ray studies, has a strong correlation with open-set speech discrimination.
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    Radiological evaluation of multiple-channel intracochlear implant insertion depth [Abstract]
    Marsh, Michael A. ; XU, JIN ; Xu, Shi-Ang ; Patrick, James F. ; Clark, Graeme M. ( 1993)
    Post-operative plain film x-rays are necessary in all multiple-channel cochlear implant patients to confirm intracochlear position of active electrodes, detect possible electrode kinking and provide a reference if post-operative slippage occurs. In addition precise documentation of multiple-channel intracochlear electrode insertion depths is necessary for comparison of speech recognition results between patients and may be of use for future speech processing strategies. In the present study a method has been devised using a modified Stenver's view to more accurately document insertion depths of the electrode array and location of individual electrodes on 50 multiple-channel cochlear implant patients. Surgical estimates of insertion depth are shown to have great variability in regard to distance along the basilar membrane when compared with x-ray documentation. The technique shows promise to facilitate mapping of binaural implant patients, young children, difficult adult cases, and possible new speech processing strategies as well as research activities requiring localization of individual electrodes.