title: Binaural-bimodal fitting or bilateral implantation for managing severe to profound deafness: a review.
abstract: There are now many recipients of unilateral cochlear implants who have usable residual hearing in the non-implanted ear. To avoid auditory deprivation and to provide binaural hearing, a hearing aid or a second cochlear implant can be fitted to that ear. This article addresses the question of whether better binaural hearing can be achieved with binaural/bimodal fitting (combining a cochlear implant and a hearing aid in opposite ears) or bilateral implantation. In the first part of this article, the rationale for providing binaural hearing is examined. In the second part, the literature on the relative efficacy of binaural/bimodal fitting and bilateral implantation is reviewed. Most studies on comparing either mode of bilateral stimulation with unilateral implantation reported some binaural benefits in some test conditions on average but revealed that some individuals benefited, whereas others did not. There were no controlled comparisons between binaural/bimodal fitting and bilateral implantation and no evidence to support the efficacy of one mode over the other. In the third part of the article, a crossover trial of two adults who had binaural/bimodal fitting and who subsequently received a second implant is reported. The findings at 6 and 12 months after they received their second implant indicated that binaural function developed over time, and the extent of benefit depended on which abilities were assessed for the individual. In the fourth and final parts of the article, clinical issues relating to candidacy for binaural/ bimodal fitting and strategies for bimodal fitting are discussed with implications for future research.
authors: National Acoustic Laboratories, Chatswood, New South Wales, Australia. teresa.ching@nal.gov.au
authors: T Y C
authors: TY
authors: Ching
authors: E
authors: E
authors: van Wanrooy
authors: H
authors: H
authors: Dillon
mesh_terms: D019929:Cochlear Implantation / Q000379:methods*; D003054:Cochlear Implants; D006312:Hearing Loss, Bilateral / Q000601:surgery*; D006801:Humans; D012720:Severity of Illness Index; D013067:Speech Perception
references: J Acoust Soc Am. 1988 Apr;83(4):1508-16
references: 3372866
references: J Am Acad Audiol. 1993 Mar;4(2):122-31
references: 8471784
references: Int J Audiol. 2006;45 Suppl 1:S113-9
references: 16938783
references: J Speech Lang Hear Res. 2001 Apr;44(2):264-85
references: 11324650
references: J Acoust Soc Am. 1993 Dec;94(6):3178-89
references: 8300953
references: Percept Psychophys. 1995 Feb;57(2):175-82
references: 7885815
references: Hear Res. 2002 Mar;165(1-2):177-88
references: 12031527
references: J Acoust Soc Am. 2005 Mar;117(3 Pt 1):1351-61
references: 15807023
references: Cochlear Implants Int. 2003 Dec;4 Suppl 1:52-4
references: 18792177
references: Ear Hear. 2006 Feb;27(1):43-59
references: 16446564
references: Nat Med. 2005 Mar;11(3):271-6
references: 15711559
references: J Speech Hear Disord. 1971 May;36(2):208-12
references: 5087658
references: J Am Acad Audiol. 1993 Sep;4(5):313-8
references: 8219298
references: Int J Audiol. 2006;45 Suppl 1:S108-12
references: 16938782
references: J Speech Hear Res. 1994 Jun;37(3):557-63
references: 8084186
references: J Acoust Soc Am. 1991 Jun;89(6):2952-60
references: 1918633
references: Int J Audiol. 2002 Oct;41(7):395-400
references: 12403607
references: Ear Hear. 2002 Feb;23(1 Suppl):80S-89S
references: 11883771
references: Lang Speech. 1978 Oct-Dec;21(4):305-18
references: 750790
references: Audiol Neurootol. 2006;11 Suppl 1:49-56
references: 17063011
references: J Acoust Soc Am. 1992 Sep;92(3):1258-68
references: 1401514
references: Hear Res. 2001 Jan;151(1-2):1-14
references: 11124447
references: Otol Neurotol. 2002 Sep;23(5):710-4
references: 12218624
references: J Neurosci. 2000 Jan 15;20(2):862-77
references: 10632616
references: Trends Amplif. 2005;9(2):77-98
references: 16012705
references: Adv Otorhinolaryngol. 2000;57:22-7
references: 11892152
references: Philos Trans R Soc Lond B Biol Sci. 1992 Jun 29;336(1278):357-65; discussion 365-6
references: 1354375
references: Nature. 2002 Mar 7;416(6876):87-90
references: 11882898
references: J Acoust Soc Am. 2003 Mar;113(3):1617-30
references: 12656396
references: Ear Hear. 2004 Jun;25(3):205-14
references: 15179112
references: Int J Audiol. 2004 Feb;43(2):61-5
references: 15035557
references: Ear Hear. 2002 Jun;23(3):198-206
references: 12072612
references: Acta Otolaryngol. 2005 Sep;125(9):918-9
references: 16109670
references: Ann Otol Rhinol Laryngol. 2002 Apr;111(4):349-56
references: 11991588
references: J Speech Lang Hear Res. 2006 Apr;49(2):338-51
references: 16671848
references: Ear Hear. 2004 Apr;25(2):173-85
references: 15064662
references: Ear Hear. 2001 Jun;22(3):212-24
references: 11409857
references: Ear Hear. 1997 Jun;18(3):252-60
references: 9201460
references: J Speech Lang Hear Res. 2005 Jun;48(3):668-80
references: 16197280
references: Ear Hear. 2000 Feb;21(1):6-17
references: 10708069
references: Laryngoscope. 2005 May;115(5):796-802
references: 15867642
references: Int J Audiol. 2005 Sep;44(9):513-21
references: 16238182
references: Trends Amplif. 1998 Jun;3(2):51-73
references: 25425879
references: Ear Hear. 1986 Aug;7(4):257-65
references: 3743918
references: J Acoust Soc Am. 2001 Jun;109(6):2910-20
references: 11425133
references: Int J Audiol. 2005 Dec;44(12):677-90
references: 16450919
references: Trends Amplif. 2001 Mar;5(1):1-34
references: 25425895
references: Int J Audiol. 2004 Feb;43(2):85-99
references: 15035561
references: Trends Amplif. 2004;8(2):49-82
references: 15497033
references: Ear Hear. 2004 Jun;25(3):197-204
references: 15179111
references: Arch Otolaryngol Head Neck Surg. 2002 Nov;128(11):1255-62
references: 12431166
references: Ear Hear. 1981 Sep-Oct;2(5):194-201
references: 7297783
references: Ear Hear. 2002 Apr;23(2):98-105
references: 11951854
references: J Am Acad Audiol. 1993 Sep;4(5):319-30
references: 8219299
references: Ear Hear. 2002 Apr;23(2):137-49
references: 11951849
references: J Am Acad Audiol. 2007 Mar;18(3):220-35
references: 17479615
references: Audiol Neurootol. 2006;11 Suppl 1:63-8
references: 17063013
references: Int J Audiol. 2006;45 Suppl 1:S3-11
references: 16938769
references: J Acoust Soc Am. 2005 Aug;118(2):1055-61
references: 16158660
references: Audiol Neurootol. 2005 May-Jun;10(3):134-44
references: 15724084
references: Int J Audiol. 2006;45 Suppl 1:S78-91
references: 16938779
references: Trends Mol Med. 2004 Jul;10(7):309-15
references: 15242678
references: Ear Hear. 2004 Feb;25(1):9-21
references: 14770014
references: Ear Hear. 2006 Apr;27(2):161-86
references: 16518144
references: J Acoust Soc Am. 1992 Dec;92(6):3132-9
references: 1474228
references: Acta Otolaryngol. 2005 Aug;125(8):863-9
references: 16158534
references: Audiol Neurootol. 2001 Jul-Aug;6(4):187-91
references: 11694725
references: Arch Otolaryngol Head Neck Surg. 1993 Jan;119(1):55-60
references: 8417744
references: Lang Speech. 2003;46(Pt 4):375-401
references: 15198113
references: J Acoust Soc Am. 2004 Apr;115(4):1729-35
references: 15101651
references: Arch Otolaryngol Head Neck Surg. 2004 May;130(5):612-8
references: 15148185
references: J Music Ther. 2003 Summer;40(2):78-112
references: 14505444
references: Trends Amplif. 2005;9(4):159-97
references: 16424945
references: Audiol Neurootol. 2004 Jul-Aug;9(4):234-46
references: 15205551
references: Arch Otolaryngol Head Neck Surg. 2004 May;130(5):648-55
references: 15148192
references: J Acoust Soc Am. 1984 Nov;76(5):1357-62
references: 6512097
references: Ear Hear. 1981 Sep-Oct;2(5):187-93
references: 7297782
references: Ear Hear. 1996 Jun;17(3 Suppl):29S-37S
references: 8807274
references: Int J Audiol. 2006;45 Suppl 1:S99-107
references: 16938781
references: Otol Neurotol. 2003 Mar;24(2):243-54
references: 12621339
references: J Acoust Soc Am. 1990 Aug;88(2):680-97
references: 2212292
references: Annu Rev Psychol. 1991;42:135-59
references: 2018391
references: Int J Pediatr Otorhinolaryngol. 2004 Oct;68(10):1257-66
references: 15364496
references: J Acoust Soc Am. 2004 Sep;116(3):1698-709
references: 15478437
references: Int J Pediatr Otorhinolaryngol. 2003 Jan;67(1):67-70
references: 12560152
references: Ann Otol Rhinol Laryngol Suppl. 1995 Sep;166:314-6
references: 7668686
references: Acta Otolaryngol Suppl. 2004 May;(552):50-4
references: 15219048
references: Ear Hear. 2001 Oct;22(5):365-80
references: 11605945
references: Otol Neurotol. 2002 Mar;23(2):169-80
references: 11875346
references: Am J Otol. 1997 Nov;18(6 Suppl):S140-1
references: 9391635
references: Acta Otolaryngol. 2005 Jun;125(6):596-606
references: 16076708
references: Acta Otolaryngol. 2004 May;124(4):358-62
references: 15224853
references: Ann Otol Rhinol Laryngol. 1989 Jun;98(6):411-6
references: 2729822
references: J Am Acad Audiol. 2001 Jan;12(1):37-51
references: 11214977
references: Audiol Neurootol. 2006;11 Suppl 1:12-5
references: 17063005
references: J Speech Hear Res. 1991 Aug;34(4):916-20
references: 1956198
references: Ear Hear. 2005 Aug;26(4 Suppl):82S-91S
references: 16082270
references: Audiol Neurootol. 2005 Nov-Dec;10(6):342-52
references: 16103645
references: J Acoust Soc Am. 1977 May;61(5):1270-7
references: 560400
references: Otol Neurotol. 2006 Aug;27(5):624-33
references: 16868510