- Graeme Clark Collection
Graeme Clark Collection
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ItemSurgical complications with the cochlear multiple-channel intracochlear implant: experience at Hannover and MelbourneWebb, Robert L. ; Lehnhardt, Ernst ; Clark, Graeme M. ; Laszig, Roland ; Pyman, Brian C. ; Franz, Burkhard K-H. G. ( 1991)The surgical complications for the first 153 multi-channel cochlear implant operations carried out at the Medizinische Hochschule in Hannover and the first 100 operations at The University of Melbourne Clinic, The Royal Victorian Eye and Ear Hospital, are presented. In the Hannover experience the major complications were wound breakdown, wound infection, electrode tie erosion through the external auditory canal, electrode slippage, a persistent increase in tinnitus, and facial nerve stimulation. The incidence of wound breakdown requiring removal of the package was 0.6% in Hannover and 1.0% in Melbourne. The complications for the operation at both clinics were at acceptable levels. It was considered that wound breakdown requiring implant removal could be kept to a minimum by making a generous incision and suturing the flap without tension.
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ItemPreliminary results for the Cochlear Corporation multielectrode intracochlear implant in six prelingually deaf patientsClark, Graeme M. ; Busby, Peter A. ; Roberts, Susan A. ; Dowell, Richard C. ; Blamey, Peter J. ; Mecklenburg, Dianne J. ; Webb, Robert L. ; Pyman, Brian C. ; Franz, Burkhard K. ( 1987)The preliminary results from this study indicate that some prelingually deaf patients may get worthwhile help from a multiple-electrode cochlear implant that uses a formant-based speech processing strategy. It is encouraging that these improvements can occur in young adults and teenagers. The results for two children are also encouraging. A 10-year-old child obtained significant improvement on some speech perception tests. It was easy to set thresholds and comfortable listening levels on a 5-year-old child, and he is now a regular user of the device. There are, however, considerable variations in performance among the prelingual patients, which may be related to the following factors: whether they have had some hearing after birth, the method of education used, the motivation of the patient, and age at implantation.
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ItemA multiple-electrode intracochlear implant for childrenClark, Graeme M. ; Blamey, Peter J. ; Busby, Peter A. ; Dowell, Richard C. ; Franz, Burkhard K-H. ; Musgrave, Gaye Nicholls ; Nienhuys, Terry G. ; Pyman, Brian C. ; Roberts, Susan A. ; Tong, Yit C. ; Webb, Robert L. ; Kuzma, Januz A. ; Money, David K. ; Patrick, James F. ; Seligman, Peter M. ( 1987)A multiple-electrode intracochlear implant that provides 21 stimulus channels has been designed for use in young children. It is smaller than the adult version and has magnets to facilitate the attachment of the headset. It has been implanted in two children aged 5 and 10 years. The two children both lost hearing in their third year, when they were still learning language. Following implantation, it was possible to determine threshold and comfortable listening levels for each electrode pair. This was facilitated in the younger child by prior training in scaling visual and electrotactile stimuli. Both children are regular users of the implant, and a training and assessment program has been commenced.