J Korean Med Assoc.  2007 Sep;50(9):825-829. 10.5124/jkma.2007.50.9.825.

Cochlear Implant

• Song JJ

• KMID: 2184922
• DOI: http://doi.org/10.5124/jkma.2007.50.9.825

Abstract

The development and improvement of cochlear auditory prostheses have radically reshaped the management of children and adults with significant hearing loss. Rapid evolution in the candidacy criteria and the technology has resulted in a large number of individuals who have benefited from implantation. Cochlear implants replace the normal inner ear by transforming acoustic sound signals into electric stimuli and deliver them to the auditory nerve. The decision to implant in a patient is a medical and surgical one. Candidacy issues, device selection, and planning for postoperative rehabilitation are complex, which require a dedicated cochlear implant team. Medical and surgical evaluation includes all aspects of cochlear implant candidacy, including critical analysis of hearing tests, motivation of the patient and family, and status of language development. Postoperative speech recognition results are variable. The expected results depend heavily on the environment in which cochlear implants are used, as well as on case selection. In children, implantation before the age of 2 years provides a distinct advantage over later implantation in cases of early-onset deafness. Postimplantation rehabilitation can be important for some adult implant recipients, but appears to be critical for children to optimize the usefulness of an implant. For early diagnosis of neonatal deafness and early implantation, a national neonatal hearing screening program is mandatory.

Keyword

Sensorineural hearing loss; Cochlear implant; Neonatal hearing loss

MeSH Terms

Acoustics
Adult
Child
Cochlear Implants*
Cochlear Nerve
Deafness
Ear, Inner
Early Diagnosis
Hearing
Hearing Loss
Hearing Loss, Sensorineural
Hearing Tests
Humans
Language Development
Mass Screening
Motivation
Rehabilitation

Reference

1. Balkany T, Hodges AV, Luntz M. Update on cochlear implantation. Otolaryngol Clin North Am. 1996. 29:277–289.

2. Djourno A, Eyries C. Auditory prosthesis by means of a distant electrical stimulation of the sensory nerve with the use of an indwelt coiling. Presse Med. 1957. 65:1417.

3. House WF. Cochlear implants. Ann Otol Rhinol Laryngol. 1976. 85:Suppl 27. 1–93.

4. Tong YC, Black RC, Clark GM, Forster IC, Millar JB, O'Loughlin BJ, Patrick JF. A preliminary report on a multiple-channel cochlear implant operation. J Laryngol Otol. 1979. 93:679–695.

5. Clark GM, Blamey PJ, Busby PA, Dowell RC, Franz BK, Musgrave GN, Nienhuys TG, Pyman BC, Roberts SA, Tong YC. A multiple-electrode intracochlear implant for children. Arch Otolaryngol Head Neck Surg. 1987. 113:825–828.

6. Proops DW, Stoddart RL, Donaldson I. Medical, surgical and audiological complications of the first 100 adult cochlear implant patients in Birmingham. J Laryngol Otol. 1999. 24:S. 14–17.

7. Cohen NL, Hoffman RA. Complications of cochlear implant surgery in adults and children. Ann Otol Rhinol Laryngol. 1991. 100:708–711.

8. Osberger MJ, Miyamoto RT, Zimmerman-Phillips S, Kemink JL, Stroer BS, Firszt JB, Novak MA. Independent evaluation of the speech perception abilities of children with the Nucleus 22-channel cochlear implant system. Ear Hear. 1991. 12:S. 66–80.

9. Waltzman SB, Cohen NL, Gomolin RH, Shapiro WH, Ozdamar SR, Hoffman RA. Long-term results of early cochlear implantation in congenitally and prelingually deafened children. Am J Otol. 1994. 15:S2. 9–13.

10. Miyamoto RT, Osberger MJ, Todd SL, Robbins AM, Stroer BS, Zimmerman-Phillips S, Carney AE. Variables affecting implant performance in children. Laryngoscope. 1994. 104:1120–1124.

11. Nikolopoulos TP, O'Donoghue GM, Archbold S. Age at implantation: its importance in pediatric cochlear implantation. Laryngoscope. 1999. 109:595–599.

12. O'Donoghue GM, Nikolopoulos TP, Archbold SM. Determinants of speech perception in children after cochlear implantation. Lancet. 2000. 356:466–468.