AL Woolley, V Jenison , BS Stroer, et al (Univ of Alabama etc.)
Cochlear Implantation in Children with Inner Ear Malformations.
Am Otol Rhino Laryngol 107:492-500, 1998.
Children born with a profound sensorineural hearing loss improve after cochlear implantation. They achieve some degree of hearing, speech and language development. A lot of difficulties may be expected if congenital inner ear abnormalities are present.
Complications: CSF leak occurred in three of the four children who had implantation of a multichannel cochlear implant.
Speech results may vary considerably.
Sb Waltzman, NL Cohen (New York Univ)
Cochlear Implantation in Children Younger than 2 years old.
Am J Otol 19:158-162, 1998.
Implantation of the Nucleus multichannel (22) cochlear prosthetic device in profoundly deaf children under 2 years of age, improved speech, recognition skills, without complications.
S. Youssefzadeh, W Baumgartner, R Dorffner, et al (Univ of Vienna)
MR Compatibility of Med EL Cochlear Implants: Clinical Testing at 1.0T.
J Comput Assist Tomogr 22: 346-350, 1998.
Magnetic resonance imaging is likely to be indicated in patients with cochlear implants. The effects of MRI on the Med EL implant were assessed in vitro and in vivo.
Patients undergoing MRI experienced no adverse reactions. All the explanted cochlear implants retained their function.
It was concluded that Med EL cochlear implantation is not a FIRM contraindication for MRI. However, in view of variations in fixation methods, implant types, and MR units, the current data do not suggest overall safety of MRI in ALL patients with cochlear implants.
J Ito (Otsu Red Cross Hosp, Japan)
Tinnitus Suppression in Cochlear Implant Patients.
Otolaryngol Head Neck Surg, 117:701-703, 1997.
Patients with profound sensorineural deafness sometimes, complain of severe and intolerable tinnitus. Cochlear implantation has helped many patients recover hearing ability and also helped tinnitus disappear. For the treatment of tinnitus, intracochlear electric stimulation was effective in 77% patients.
The mechanism by which tinnitus suppresses with time is not understood. The speech comprehension ability of patients who have received cochlear implants has improved when the stimulation mode for the implant was changed to Spectral peak mode.
Henson A, Slattery WH III, Luxford WM, et al (House Ear Inst and Clinic, Los Angeles)
Cochlear Implant Performance After Reimplantation: A Multicenter study.
Am J Otol 20: 56-64, 1999.
Failed cochlear implantation done in children or adults with profound deafness requires reimplantation.
18 centers provided information on 30 adults implanted with nucleus, 22 implants with the similar implant replacement. These patients were retested with the same sentence and word recognition test as with their original units. Patients were asked to compare the communication devices.
It was concluded that more than one-third of patients reported worse performance with their reimplant. It is therefore, advised to counsel these patients before reimplant regarding the possibility of differences in sound quality and speech recognition performances with reimplant.