The cochlear implant: a comparison of single-channel and multichannel results.

: We have performed 39 cochlear implants at St. Paul's Hospital since 1982. Fourteen patients received a House/3M implant and 23 patients received a total of 25 multichannel Nucleus implants. We present a comparison of subjective and objective results in seven patients who first received a single channel implant and were subsequently implanted with a multichannel device. We also report in detail results obtained by a 55-year-old man who received a House/3M implant and subsequently received bilateral Nucleus implants. Results in this patient demonstrate some factors that influence successful use of an implant.