Graeme Clark Collection

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End date: 1989 × Start date: 1980 × Type: Journal Article × Subject: electrode array × Subject: otology ×

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Now showing 1 - 3 of 3
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    Current distributions produced by the banded electrode array: an experimental study conducted with a tank model
    Lukies, P. M. ; Tong, Y. C. ; Clark, Graeme M. ( 1987)
    The tank model consisted of a 22-band electrode array lying in a homogeneous normal saline solution in the base of a tube 5 mm in diameter and 4 cm in length. The current distribution was obtained by measuring vector potentials along the longitudinal direction at a given radial distance from the electrode array. The results indicate that when only one pair of electrodes is stimulated, the current distribution is bell shaped. When two pairs are simultaneously stimulated by two isolated current sources, the results demonstrate a vector summation of current density throughout the system.
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    Refined surgical technique for insertion of banded electrode array
    Franz, B. K-H. G. ; Clark, Graeme M. ( 1987)
    A refined electrode insertion technique is presented for the multichannel cochlear implant. It comprises two basic steps. The first step is the removal of the anteroinferior overhang of the round window and crista fenestrae, or alternatively an opening drilled into the scala tympani anteroinferior to the round window. The second is rotation of the electrode during insertion, counterclockwise in the right ear and clockwise in the left ear.
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    Surgery for the safe insertion and reinsertion of the banded electrode array
    Clark, Graeme M. ; Pyman, B. C. ; Webb, R. L. ; Franz, B. K-H. G. ; Redhead, T. J. ; Shepherd, R. K. ( 1987)
    Adhering to the surgical technique outlined in the protocol for the Nucleus implant has resulted in over 100 patients worldwide obtaining significant benefit from multichannel stimulation. A detailed analysis of the results in 40 patients shows that it improves their awareness of environmental sounds and their abilities in understanding running speech when combined with lipreading. In addition, one third to one half of the patients also understand significant amounts of running speech without lipreading and some can have interactive conversations over the telephone. It is clear that any insertion trauma is not significant, which is confirmed by the excellent clinical results.