Graeme Clark Collection

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Author: PYMAN, BRIAN × End date: 1999 × Start date: 1990 × Subject: surgery ×

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Now showing 1 - 4 of 4
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    Surgery
    Clark, Graeme M. ; Pyman, Brian C. ; Webb, Robert L. (Singular Publishing, 1997)
    Cochlear implant surgery should be undertaken only after the cochlear implant team has established that the child is not achieving useful communication with a hearing aid. This can be difficult because of poor language development in deaf children in this age group or because the child is at a preverbal stage and too young for the use of formal assessment tests. The child's unaided and aided thresholds, however, are important for assessment, as are his or her communication skills. These need to be evaluated by an experienced paediatric audiologist.
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    Preoperative medical evaluation
    Clark, Graeme M. ; Pyman, Brian C. (Singular Publishing, 1997)
    The aim of the medical assessment of infants and children is to determine the cause, severity and duration of any hearing loss as well as the presence of any medical conditions that may influence their management with a cochlear implant. There should also be an initial assessment of the child's communication skills and the parental expectations for his or her education.
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    Surgical considerations for the placement of the new Cochlear Pty Limited micro-multiple-channel cochlear implant for research studies
    Clark, Graeme M. ; Pyman, B. C. ; Webb, R. L. ( 1995)
    A new micro-receiver-stimulator for research studies on very young children as well as adults has been developed by Cochlear Pty Limited. The dimensions of the device are length 58 mm and width at front 18 mm. The width starts to increase 19 mm from the front, and the back section, which has the receiver coil and magnet, has a maximum diameter of 33 mm. The depth or thickness of the front portion of the electronic package is 5.7mm, and the remainder of the package 4.0 mm. The antenna section is 3.5 mm thick. The other dimensions of the front section of the electronic package are length 9.5 mm and width 13.7 mm. There is an angle of 160° between the titanium electronic package and the receiver coil. The dimensions of the receiver-stimulator were arrived at after anatomic studies on the temporal bones of children ranging in age from 2 to 11 months.
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    Surgical complications with the cochlear multiple-channel intracochlear implant: experience at Hannover and Melbourne
    Webb, 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.