Sa. Xu et al., COMPARISON OF HALF-BAND AND FULL-BAND ELECTRODES FOR INTRACOCHLEAR ELECTRICAL-STIMULATION, The Annals of otology, rhinology & laryngology, 102(5), 1993, pp. 363-367
It was hypothesized that intracochlear stimulating electrodes oriented
toward the modiolus would require a lower stimulus current to elicit
a threshold neural response than longitudinal band electrodes. Electri
cally evoked auditory brain stem responses (EABRs) and electrode imped
ances were recorded with full-band and oriented half-band scala tympan
i electrodes in anesthetized, deafened cats. To elicit a threshold EAB
R, the stimulus current required for stimulation through half-band ele
ctrodes oriented toward the modiolus was not significantly different f
rom the current required for stimulation through full-band electrodes.
The impedances of full-band electrodes were significantly lower than
those of half-band electrodes. Considering the significantly higher im
pedance and current density of half-band electrodes in comparison to f
ull-band electrodes, as well as the critical orientation of half-band
electrodes during implantation, we believe that full-band electrodes h
ave advantages over half-band electrodes for scala tympani implantatio
n.