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Boisvert, Isabelle
Publications (8 of 8) Show all publications
Boisvert, I., McMahon, C. M., Dowell, R. C. & Lyxell, B. (2015). Long-Term Asymmetric Hearing Affects Cochlear Implantation Outcomes Differently in Adults with Pre- and Postlingual Hearing Loss. PLoS ONE, 10(6), Article ID e0129167.
Open this publication in new window or tab >>Long-Term Asymmetric Hearing Affects Cochlear Implantation Outcomes Differently in Adults with Pre- and Postlingual Hearing Loss
2015 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 10, no 6, article id e0129167Article in journal (Refereed) Published
Abstract [en]

In many countries, a single cochlear implant is offered as a treatment for a bilateral hearing loss. In cases where there is asymmetry in the amount of sound deprivation between the ears, there is a dilemma in choosing which ear should be implanted. In many clinics, the choice of ear has been guided by an assumption that the reorganisation of the auditory pathways caused by longer duration of deafness in one ear is associated with poorer implantation outcomes for that ear. This assumption, however, is mainly derived from studies of early childhood deafness. This study compared outcomes following implantation of the better or poorer ear in cases of long-term hearing asymmetries. Audiological records of 146 adults with bilateral hearing loss using a single hearing aid were reviewed. The unaided ear had 15 to 72 years of unaided severe to profound hearing loss before unilateral cochlear implantation. 98 received the implant in their long-term sound-deprived ear. A multiple regression analysis was conducted to assess the relative contribution of potential predictors to speech recognition performance after implantation. Duration of bilateral significant hearing loss and the presence of a prelingual hearing loss explained the majority of variance in speech recognition performance following cochlear implantation. For participants with post-lingual hearing loss, similar outcomes were obtained by implanting either ear. With prelingual hearing loss, poorer outcomes were obtained when implanting the long-term sound-deprived ear, but the duration of the sound deprivation in the implanted ear did not reliably predict outcomes. Contrary to an apparent clinical consensus, duration of sound deprivation in one ear has limited value in predicting speech recognition outcomes of cochlear implantation in that ear. Outcomes of cochlear implantation are more closely related to the period of time for which the brain is deprived of auditory stimulation from both ears.

Place, publisher, year, edition, pages
PUBLIC LIBRARY SCIENCE, 2015
National Category
Basic Medicine
Identifiers
urn:nbn:se:liu:diva-120052 (URN)10.1371/journal.pone.0129167 (DOI)000355701600092 ()26043227 (PubMedID)
Note

Funding Agencies|Macquarie University Research Excellence Scheme; HEARing CRC, under Cooperative Research Centres Program - Business Australia; Linnaeus Centre HEAD, The Swedish Institute for Disability Research

Available from: 2015-07-06 Created: 2015-07-06 Last updated: 2018-01-11
Boisvert, I., Lyxell, B., Mäki-Torkko, E., McMahon, C. M. & Dowell, R. C. (2012). Choice of Ear for Cochlear Implantation in Adults With Monaural Sound-Deprivation and Unilateral Hearing Aid. Otology and Neurotology, 33(4), 572-579
Open this publication in new window or tab >>Choice of Ear for Cochlear Implantation in Adults With Monaural Sound-Deprivation and Unilateral Hearing Aid
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2012 (English)In: Otology and Neurotology, ISSN 1531-7129, E-ISSN 1537-4505, Vol. 33, no 4, p. 572-579Article in journal (Refereed) Published
Abstract [en]

Objectives: To identify whether speech recognition outcomes are influenced by the choice of ear for cochlear implantation in adults with bilateral hearing loss who use a hearing aid in 1 ear but have long-term auditory deprivation in the other. less thanbrgreater than less thanbrgreater thanStudy Design: Retrospective matched cohort study. Speech recognition results were examined in 30 adults with monaural sound deprivation. Fifteen received the implant in the sound-deprived ear and 15 in the aided ear. less thanbrgreater than less thanbrgreater thanSetting: Tertiary referral centers with active cochlear implant programs. less thanbrgreater than less thanbrgreater thanPatients: Adults with bilateral hearing loss and a minimum of 15 years of monaural sound deprivation who received a cochlear implant after meeting the traditional implantation criteria of the referral centers. less thanbrgreater than less thanbrgreater thanIntervention: Cochlear implantation with devices approved by the U.S. Food and Drug Administration. less thanbrgreater than less thanbrgreater thanMain Outcome Measure(s): Paired comparisons of postoperative monosyllabic word recognition scores obtained with the implant alone and in the usual listening condition (CI alone or bimodal). less thanbrgreater than less thanbrgreater thanResults: With the cochlear implant alone, individuals who received the implant in a sound-deprived ear obtained poorer scores than individuals who received the implant in the aided ear. There was no significant difference, however, in speech recognition results for the 2 groups when tested in their usual listening condition. In particular, poorer speech recognition scores were obtained with the cochlear implant alone by individuals using bimodal hearing. less thanbrgreater than less thanbrgreater thanConclusion: Similar clinical outcomes of cochlear implantation can be achieved by adults with a long-term monaural sound deprivation when comparing the usual listening condition, irrespective of whether the implant is in the sound-deprived or in the aided ear.

Place, publisher, year, edition, pages
Lippincott, Williams and Wilkins, 2012
Keywords
Adults, Auditory deprivation, Choice of ear, Cochlear implant, Outcomes, Speech perception, Unilateral hearing aid
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-78568 (URN)10.1097/MAO.0b013e3182544cdb (DOI)000304315900016 ()
Note
Funding Agencies|Macquarie University||HEARing CRC||Australian Government||HEAD Graduate School in Sweden||Available from: 2012-06-15 Created: 2012-06-15 Last updated: 2017-12-07
Boisvert, I., McMahon, C. M., Dowell, R., Lyxell, B., Psarros, C., Tremblay, G., . . . Karltorp, E. (2012). How the non-implanted ear influences outcomes of cochlear implantation. In: : . Paper presented at Audiology Australia National Conference 2012, July 1-4, Adelaide, Australia.
Open this publication in new window or tab >>How the non-implanted ear influences outcomes of cochlear implantation
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2012 (English)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Social Sciences
Identifiers
urn:nbn:se:liu:diva-105054 (URN)
Conference
Audiology Australia National Conference 2012, July 1-4, Adelaide, Australia
Available from: 2014-03-06 Created: 2014-03-06 Last updated: 2014-03-19
Boisvert, I., McMahon, C. M. & Dowell, R. C. (2012). Long-term monaural auditory deprivation and bilateral cochlear implants. NeuroReport, 23(3), 195-199
Open this publication in new window or tab >>Long-term monaural auditory deprivation and bilateral cochlear implants
2012 (English)In: NeuroReport, ISSN 0959-4965, E-ISSN 1473-558X, Vol. 23, no 3, p. 195-199Article in journal (Refereed) Published
Abstract [en]

Long-term binaural auditory deprivation is associated with poorer speech recognition outcomes after cochlear implantation, even for postlingual hearing loss. It is, however, unknown to what extent the outcomes of implantation are related to the peripheral changes occurring monaurally or to changes at a higher level in the auditory system related to binaural deafness. This retrospective study aimed to unravel peripheral and central contributions to cochlear implantation outcomes by comparing outcomes obtained in individual ears for adults with long-term monaural auditory deprivation (i.e. unilateral use of hearing aid) who received bilateral cochlear implants. Results showed that similar outcomes can be obtained with the implant placed in the auditory-deprived or in the aided ear. This suggests that the peripheral changes related to monaural auditory deprivation have little effect on outcomes of cochlear implantation. NeuroReport 23: 195-199

Place, publisher, year, edition, pages
Lippincott, Williams and Wilkins, 2012
Keywords
auditory deprivation, auditory stimulation, bilateral, cochlear implants, deafness, electrical stimulation, hearing loss, monaural, speech perception
National Category
Social Sciences
Identifiers
urn:nbn:se:liu:diva-75270 (URN)10.1097/WNR.0b013e32834fab4b (DOI)000299871500014 ()
Note
Funding Agencies|Macquarie University||HEARing CRC under the Australian Government||Available from: 2012-02-27 Created: 2012-02-24 Last updated: 2017-12-07
Boisvert, I., McMahon, C. M., Dowell, R., Lyxell, B., Psarros, C., Tremblay, G., . . . Karltorp, E. (2012). The Contribution of the non-implanted ear to Cochlear implantation Outcomes. In: : . Paper presented at 12th International Coference on Cochlear Implants and other Implantable Auditory Technologies, May 3-5, 2012, Baltimore, USA.
Open this publication in new window or tab >>The Contribution of the non-implanted ear to Cochlear implantation Outcomes
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2012 (English)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Social Sciences
Identifiers
urn:nbn:se:liu:diva-105057 (URN)
Conference
12th International Coference on Cochlear Implants and other Implantable Auditory Technologies, May 3-5, 2012, Baltimore, USA
Available from: 2014-03-06 Created: 2014-03-06 Last updated: 2014-03-19
Boisvert, I., McMahon, C. M., Lyxell, B. & Dowell, R. (2011). Monaural sound deprivation; opening a window on central processes underlying cochlear implantation outcomes. In: : . Paper presented at First International Conference on Cognitive Hearing Science for Communication, Linköping, Sweden, 19-22 June 2011.
Open this publication in new window or tab >>Monaural sound deprivation; opening a window on central processes underlying cochlear implantation outcomes
2011 (English)Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

When considering unilateral cochlear implantation, clinicians must decide which ear should be implanted. This decision process is made more complex in the case of long-term monaural sound-deprivation where a hearing aid is used in the non-deprived ear. Clinical recommendations are not uniform where some clinicians suggest implanting the sound-deprived ear, regardless of the length of deprivation, to preserve the remaining hearing of the non-deprived ear. Others recommend implanting the non-deprived ear, arguing that implanting a recently stimulated ear provides higher outcomes with the implant. The literature discussing implanting the “better” or “worse” ear is inconclusive and none have specifically compared outcomes of implantation in ears with long-term monaural sound-deprivation.The current study draws its findings from cochlear implant centres located in 3 countries. Comparative analyses of cochlear implantation outcomes obtained in adults with monaural sound-deprivation of durations ranging from 15 to 65 years and implanted in the non-deprived (n≈90) or sound-deprived ear (n≈100) have been conducted. The results show that similar functional outcomes can be achieved by both groups when comparing the everyday listening condition (cochlear implant alone or bimodal hearing [i.e. cochlear implant in one ear and hearing aid in the other]). Moreover, higher outcomes were obtained after cochlear implantation by individuals with a long-term monaural sound-deprivation compared to individuals with a long-term bilateral sound-deprivation (n≈15), irrespective of which ear was implanted. These results pave the way to a discussion about central processes underlying cochlear implantation outcomes.

National Category
Social Sciences
Identifiers
urn:nbn:se:liu:diva-102355 (URN)
Conference
First International Conference on Cognitive Hearing Science for Communication, Linköping, Sweden, 19-22 June 2011
Available from: 2013-12-07 Created: 2013-12-07 Last updated: 2014-03-09
Boisvert, I., McMahon, C. M., Tremblay, G. & Lyxell, B. (2011). Relative Importance of Monaural Sound Deprivation and Bilateral Significant Hearing Loss in Predicting Cochlear Implantation Outcomes. Ear and Hearing, 32(6), 758-766
Open this publication in new window or tab >>Relative Importance of Monaural Sound Deprivation and Bilateral Significant Hearing Loss in Predicting Cochlear Implantation Outcomes
2011 (English)In: Ear and Hearing, ISSN 0196-0202, E-ISSN 1538-4667, Vol. 32, no 6, p. 758-766Article in journal (Refereed) Published
Abstract [en]

Objectives: Making evidence-based recommendations to prospective unilateral cochlear implant recipients on the potential benefits of implanting one or the other ear is challenging for cochlear implant teams. This particularly occurs in cases where a hearing aid has only been used in one ear for many years (referred to here as the "hearing ear"), and the contralateral ear has, in essence, been sound-deprived. In such cases, research to date is inconclusive, and little anecdotal evidence exists to inform the debate and support best clinical practice. less thanbrgreater than less thanbrgreater thanDesign: Retrospective data on speech recognition outcomes of 16 adult participants who received a cochlear implant in an ear deprived of sound for a minimum of 15 yr were analyzed. All subjects were implanted through the Quebec Cochlear Implant Program and were provided with personalized intensive rehabilitation services. Data obtained from clinical records included demographic data and speech recognition scores measured after implantation with the sentences of a multimedia auditory test battery in the auditory-only condition. Speech recognition outcomes were compared with the duration of auditory deprivation in the implanted ear, bilateral significant hearing loss, and auditory stimulation before bilateral significant hearing loss. less thanbrgreater than less thanbrgreater thanResults: Using nonparametric correlation analyses, a strong negative correlation was demonstrated between speech recognition scores and the duration of bilateral significant hearing loss and with the duration of auditory stimulation before bilateral significant hearing loss. No significant correlation with the duration of auditory deprivation or with the duration of prior auditory stimulation in the implanted ear was found. less thanbrgreater than less thanbrgreater thanConclusions: These findings suggest that functional outcomes of cochlear implantation for unilateral sound deprivation may be more strongly influenced by central processes than peripheral effects stemming from the deprivation per se. This indicates the relevance of considering the clients history of binaural hearing rather than the hearing in each ear individually when discussing possible outcomes with a cochlear implant.

Place, publisher, year, edition, pages
Lippincott, Williams and Wilkins, 2011
National Category
Social Sciences
Identifiers
urn:nbn:se:liu:diva-72252 (URN)10.1097/AUD.0b013e3182234c45 (DOI)000296586900013 ()
Note
Funding Agencies|Macquarie University||HEARing CRC||Australian Governments Cooperative Research Centre||HEAD research group in Sweden||Available from: 2011-11-24 Created: 2011-11-24 Last updated: 2017-12-08
Boisvert, I., McMahon, C. M., Lyxell, B., Tremblay, G., Psarros, C., Karltorp, E. & Mäki-Torkko, E. (2010). A Multicenter Study of Cochlear Implantation Outcomes in Individuals with a Long Term Unilateral Sound Deprivation. In: : . Paper presented at 11th International Conference on Cochlear Implants and other Implantable Auditory Technologies, 30 juni - 3 juli 2010, Stockholm, Sweden.
Open this publication in new window or tab >>A Multicenter Study of Cochlear Implantation Outcomes in Individuals with a Long Term Unilateral Sound Deprivation
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2010 (English)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Social Sciences
Identifiers
urn:nbn:se:liu:diva-105058 (URN)
Conference
11th International Conference on Cochlear Implants and other Implantable Auditory Technologies, 30 juni - 3 juli 2010, Stockholm, Sweden
Available from: 2014-03-06 Created: 2014-03-06 Last updated: 2014-03-19
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