Extra Benefit of a Second Cochlear Implant With Respect to Health-Related Quality of Life and Tinnitus

[Cochlear implant and tinnitus]

Cochlear implant (CI) treatment is now established as a successful standard of care for auditory rehabilitation of profoundly deaf or severe hearing loss patients. CI candidates with tinnitus also benefit from improved health-related quality of life (HRQoL) and tinnitus burden. Current CI indications include bilateral (double-sided) profound hearing loss and deafness (DSD), unilateral (single-sided) deafness (SSD), and asymmetric hearing loss (AHL). The new and expanded indications for cochlear implants result in different healthcare situations, which may also be associated with differences in tinnitus burden before and after CI treatment. In this article, we discuss the prevalence of tinnitus in different patient groups and the influence of CI on tinnitus prevalence and severity in these groups. In addition, further therapeutic options for tinnitus suppression based on the CI principle are presented, including the development of an anti-tinnitus implant (proof of concept).

[Prospective comparative analysis of cochlear implant patients with single-sided deafness and asymmetric hearing loss with regard to health-related quality of life, tinnitus distress and psychological comorbidities]

BACKGROUND

Patients with single-sided deafness (SSD) and asymmetric hearing loss (AHL) are increasingly being treated with cochlear implants (CI) due to the demonstrated improvements in auditory abilities and quality of life. To date, there are few published studies in which these two groups are comparatively studied. The aim of the current study was to examine which factors differ between those two patient groups, especially preoperatively.

METHODS

A secondary analysis of the previously published raw data of 66 prospectively recruited CI patients (21 SSD/45 AHL) was performed. In addition to the hearing outcome, tinnitus distress (tinnitus questionnaire), health-related quality of life (Nijmegen Cochlear Implant Questionnaire, NCIQ), stress (Perceived Stress Questionnaire, PSQ), and psychological comorbidities (General Depression Scale, ADS‑L and Generalized Anxiety Disorder scale, GAD-7) were assessed in SSD and AHL patients pre- and postoperatively.

RESULTS

Preoperatively, SSD patients showed significantly higher scores in the NCIQ subdomains "elementary" and "advanced sound perception" than the AHL group. Stress (PSQ) and anxiety symptoms (GAD-7) were significantly higher preoperatively in SSD patients than in AHL patients. After CI, these differences were strongly reduced, with minimal differences being detectable between the groups in the investigated domains postoperatively.

CONCLUSION

SSD and AHL patients differ significantly preoperatively in terms of their subjective hearing assessment and psychosocial parameters. In SSD patients, psychological stress factors may have a stronger impact on the quality of life than in AHL patients. These aspects should be taken into account in the preoperative counseling and postoperative rehabilitation.

Experience of tinnitus in adults who have severe-to-profound hearing loss: A scoping review

Background

Tinnitus is defined as the subjective perception of sound in the absence of an external stimulus, and tinnitus disorder becomes relevant when it is associated with emotional distress, cognitive dysfunction, and/or autonomic arousal. Hearing loss is recognized as the main risk factor for the pathogenesis of tinnitus. However, clinical guidelines for tinnitus disorder provide little direction for those who have severe-to-profound hearing loss including those who are pre-lingually Deaf. The aim of this scoping review was to catalogue what is known from the existing literature regarding the experience and management of tinnitus in adults who have a severe-to-profound hearing loss.

Summary

A scoping review was conducted following the Preferred Reporting Item for Systematic Reviews and Meta-analysis extension for Scoping Reviews. Records were included if they reported an evaluation of tinnitus in adults who had severe-to-profound hearing loss. The online databases Ovid (MEDLINE, EMBASE and PsycINFO), CINAHL, ProQuest, Scopus, and Google Scholar were searched using the search terms ‘tinnitus’ (as a MESH term) and ‘deaf’ OR ‘profound hearing loss. Thirty-five records met the inclusion criteria for this review and were cataloged according to three major themes: Impact of tinnitus in deaf adults; Primary treatment of tinnitus in deaf adults; and Cochlear implant studies where tinnitus was a secondary outcome. Tinnitus symptom severity was assessed before and after intervention using tinnitus validated questionnaires in 29 records, with six further records using other assessment tools to measure tinnitus severity. Participants using cochlear implants were included in 30 studies. Medication, repetitive transcranial magnetic stimulation (rTMS), electrical promontory stimulation, and behavioral self-control therapy were each reported in single records.

Key messages

This scoping review cataloged the experience, assessment, and treatment of tinnitus in adults who have severe-to-profound hearing loss. It is shown that there is very limited research reported in this field. Although this review included many records, most focused on the provision of cochlear implants for severe-to-profound hearing loss, with assessment and measurement of tinnitus as a baseline or secondary outcome. Largely missing in the literature are empirical studies that seek firstly to understand the nature of the experience of tinnitus by people with no or little residual access to external sound.

Auditory Brainstem Implants-Hearing Restoration in Congenitally Deaf Children

BACKGROUND

Children who are born deaf can learn to hear and to speak with the aid of a cochlear implant (CI). If the implantation of a CI is not possible for anatomical reasons, an auditory brainstem implant (ABI) is the only surgical option for auditory rehabilitation. It is estimated that about 5 to 45 children could potentially benefit from this treatment in Germany each year. In this article, we present and discuss the current state of the scientific evidence.

METHODS

The PubMed and Embase databases were searched for relevant publications from 2010 onward. 15 articles reporting at least 10 cases with at least one year of auditory follow-up were included in the analysis. The results, including CAP ("categories of auditory performance") scores on a scale of 0 to 7, are presented and compared with the authors' own findings in a series of 38 patients.

RESULTS

All of the publications show that children who do not suffer from impairments of other kinds hear significantly better with an ABI than those with additional handicaps. Early implantation is advantageous, under the age of three years if possible. The results vary widely across publications and from patient to patient. The mean CAP score in all publications is 3.57 (standard deviation [SD], 1.04). 38.24% of the patients (SD 18.68) achieved the ability to understand spoken language (CAP ≥= 5), more specifically, the ability to communicate in everyday life without lip reading, in person and some even succeed in conversing over the telephone.

CONCLUSION

ABI is a safe and effective treatment for sensorineural deafness in congenitally deaf children who cannot be treated with a cochlear implant. In particular, children without any other impairments have a good chance of developing the ability to understand spoken language, especially if the implantation is performed early.

[Validity and reliability of the Nijmegen Cochlear Implant Questionnaire in German]

Hintergrund

Der Nijmegen Cochlear Implant Questionnaire (NCIQ) ist ein krankheitsspezifischer Fragebogen zur Erhebung der gesundheitsbezogenen Lebensqualität von Patienten vor und nach Cochleaimplantation.

Ziel der Arbeit

Validierung und Reliabilitätsprüfung der deutschen Übersetzung des NCIQ.

Material und Methoden

Es wurde eine prospektive Studie an 100 postlingual ertaubten oder hochgradig schwerhörigen Patienten durchgeführt, welche präoperativ sowie 3 und 6 Monate nach einer Cochleaimplantation mittels NCIQ, Abbreviated Profile of Hearing Aid Benefit (APHAB) und Hearing Participation Scale (HPS) untersucht wurden. Als Kontrolle fungierte ein postlingual ertaubtes oder hochgradig schwerhöriges, unbehandeltes Patientenkollektiv (n = 54). Cronbach‑α und Test-Retest-Reliabilität dienten der Reliabilitätsüberprüfung. Es wurde auf Inhalts‑, Übereinstimmungs- und auf diskriminative Validität getestet. Die Konstruktvaliditätsprüfung basiert auf kürzlich veröffentlichen Daten. Als Gütekriterien wurden die Sensitivität und eine ROC(„Receiver Operating Characteristic“)-Analyse, inklusive AUC(„Area Under the ROC Curve“)-Betrachtung, eingesetzt.

Ergebnisse

Das Test-Retesting ergab nach 3 und 6 Monaten postoperativ stabile NCIQ-Werte. Die Cronbach-α-Werte wiesen auf eine gute interne Konsistenz hin. Der NCIQ diskriminierte valide zwischen behandelten und unbehandelten Patientengruppen. Es ergaben sich statistisch signifikante, wenn auch schwache, Korrelationen zwischen dem NCIQ und dem APHAB (r = −0,22; p = 0,04) und dem HPS (r = 0,30; p = 0,01). Sensitivitäts- und ROC-Analysen zeigten eine gute Messqualität des deutschsprachigen NCIQ.

Schlussfolgerung

Die deutsche Übersetzung des NCIQ misst zuverlässig und valide die Lebensqualität vor und nach Cochleaimplantation und kann zur klinischen Erfolgskontrolle nach Cochleaimplantationen verwendet werden.

The Effect of Cochlear Implantation on Tinnitus and Quality of Life: A Systematic Review and Meta-analysis

OBJECTIVE

To ascertain the effect of cochlear implantation (CI) on tinnitus and quality of life.

DATABASES SOURCES

PubMed, Scopus, Web of Science, and Cochrane Library were searched through August 21, 2020. Search strategies used a combination of subject headings (e.g., MeSH in PubMed) and keywords for the following two concepts: cochlear implantation and tinnitus.

STUDY SELECTION

English articles reporting on pre-intervention tinnitus-related patient-reported outcome measures (e.g., Tinnitus Handicap Inventory [THI], Tinnitus Questionnaire [TQ], Visual Analogue Scale [VAS] for loudness) and quality of life measures (e.g., Nijmegen Cochlear Implantation Questionnaire [NCIQ] and Hospital Anxiety and Depression Scale [HADS]) for CI recipients were included.

DATA EXTRACTION

Demographics, baseline, and follow-up data.

DATA SYNTHESIS

Total of 27 articles reporting on 1,285 patients (mean age 54.5 years, range 14-81) were included. Meta-analysis of all tinnitus-related measures demonstrated improvement following implantation, with a mean difference of -23.2 [95% CI: -28.8 to -17.7], -12.6 [95% CI: -17.5 to -7.8], and -4.5 [95% CI: -5.5 to -3.4] (p < 0.05 for all) for THI, TQ, and VAS, respectively. NCIQ increased by 12.2 points [95% CI: 8.2-16.2] (p < 0.05), indicating improved quality of life among CI recipients. Psychological comorbidities were also ameliorated, as evidenced by reductions in HADS depression (-1.7 [95% CI: -2.4 to -0.9]) and anxiety (-1.3 [95% CI: -2.1 to -0.5]) (p < 0.05 for both) scores.

CONCLUSION

Following CI, patients reported significant improvement in tinnitus via several validated questionnaires. Additional benefits include improved quality of life and reduction in psychological comorbidities.

Challenges of Cochlear Implantation in Intralabyrinthine Schwannoma Patients: Surgical Procedures and Auditory Outcome

Intralabyrinthine schwannoma (ILS) is a rare benign tumor of the inner ear potentially causing unilateral sensorineural hearing loss and vertigo. This study evaluated the outcome of one surgical session comprising microsurgical ILS resection and cochlear implantation in terms of surgical feasibility, complications, and auditory outcome. Ten clinically and histologically confirmed ILS patients included in this study (three women and seven men; mean age 56.4 ± 8.6) underwent surgery between July 2015 and February 2020. Eight patients had intracochlear tumor location; the remaining two had vestibulocochlear and intravestibular ILS. One of the three following methods was used for tumor removal: an extended cochleostomy, subtotal cochleoectomy, or a translabyrinthine approach. Although negligible improvement was observed in two of the patients, two patients were lost to follow-up, and one opted out from using CI, the speech perception of the five remaining ILS patients improved as per the Freiburg Monosyllable Test (FMT) from 0% before surgery to 45– 50% after the implantation. Our study supports the presented surgical approach’s feasibility and safety, enabling tumor removal and hearing restoration shortly after surgery.

Validity and reliability of the Cochlear Implant Quality of Life (CIQOL)-35 Profile and CIQOL-10 Global instruments in comparison to legacy instruments

OBJECTIVE

Validated and reliable patient-reported outcome measures (PROMs) may provide a comprehensive and accurate assessment of the real-world experiences of cochlear implant (CI) users and complement information obtained from speech recognition outcomes. To address this unmet clinical need, the Cochlear Implant Quality of Life (CIQOL)-35 Profile instrument and CIQOL-10 Global measure were developed according to the Patient-Reported Outcomes Information System (PROMIS) and COnsensus-based Standards for the Selection of health status Measurement INstruments (COSMIN) guidelines. The CIQOL-35 Profile consists of 35 items in six domain constructs (communication, emotional, entertainment, environment, listening effort, and social) and the CIQOL-10 Global contains 10 items that provide an overall CIQOL score. The present study compares psychometric properties of the newly developed CIQOL instruments to two legacy PROMs commonly used in adult CI users.

DESIGN

Using a prospective cohort design, a sample of 334 adult CI users recruited from across the United States provided responses to (1) the CIQOL instruments; (2) a CI-specific PROM (Nijmegen Cochlear Implant Questionnaire, NCIQ); and (3) a general-health PROM (Health Utilities Index 3 [HUI-3]). Responses were obtained again after 1 mo. The reliability and validity of the CIQOL-35 Profile and CIQOL-10 Global instruments were compared with the legacy PROMs (NCIQ and HUI-3). Psychometric properties and construct validity of each instrument were analyzed using confirmatory factor analysis, item response theory (IRT), and test-retest reliability (using Pearson's correlations), where appropriate.

RESULTS

All six CIQOL-35 Profile domains and the CIQOL-10 Global instrument demonstrated adequate to strong construct validity. The majority of the NCIQ subdomains and NCIQ total score had substantial confirmatory factor analysis model misfit, representing poor construct validity. Therefore, IRT analysis could only be applied to the basic sound performance and activity limitation subdomains of the NCIQ. IRT results showed strong psychometric properties for all CIQOL-35 Profile domains, the CIQOL-10 Global instrument, and the basic sound performance and activity limitation subdomains of the NCIQ. Test-retest reliability was strong for the CIQOL-35 Profile, CIQOL-10 Global, and NCIQ, but moderate to weak for the HUI-3; the hearing score of the HUI-3 demonstrated the weakest reliability.

CONCLUSION

The CIQOL-35 Profile and CIQOL-10 Global are more psychometrically sound and comprehensive than the NCIQ and the HUI-3 for assessing QOL in adult CI users. Due to poor reliability, we do not recommend using the HUI-3 to measure QOL in this population. With validation and psychometric analyses complete, the CIQOL-35 Profile measure and CIQOL-10 Global instrument are now ready for use in clinical and research settings to measure QOL and real-world functional abilities of adult CI users.

Sustained reduction of tinnitus several years after sequential cochlear implantation

OBJECTIVE

This study aimed to explore the short- and long-term effects of a second cochlear implant (CI-2) on the reduction of tinnitus annoyance and tinnitus handicap.

DESIGN

In a combined retrospective and prospective cohort study, tinnitus annoyance was measured before receiving the CI-2 (Pre), more than two years after (Post1) and more than seven years after (Post2), using the Tinnitus Handicap Inventory (THI), the Visual Analog Scale for the assessment of perceived tinnitus loudness (VAS-L) and annoyance (VAS-A), and a self-report questionnaire.

STUDY SAMPLE

Twenty sequentially bilaterally implanted adults with bothersome tinnitus.

RESULTS

CI-2 implantation resulted in a statistically significant reduction of tinnitus handicap from severe at Pre to mild at Post1 (THI mean score reduced from 61.3 [SD = 19.4] to 29.3 [SD = 23.5]). The reduction in tinnitus annoyance was statistically significant from Pre to Post 2 (VAS-A reduced from 7.1 [SD = 1.5] to 3.4 [SD = 2.2]). The reduction in tinnitus loudness was not statistically significant.

CONCLUSIONS

The provision of a CI-2 for severely and profoundly hearing-impaired individuals with bothersome tinnitus is an effective method of providing long-term tinnitus relief.

Health-Related Quality of Life Changes Associated With Hearing Loss

Importance

Utility is a single-value, preference-based measure of health-related quality of life that represents the desirability of a health state relative to being dead or in perfect health. Clinical, funding, and policy decisions rely on measured changes in utility. The benefit of hearing loss treatments may be underestimated because existing utility measures fail to capture important changes in quality of life associated with hearing loss.

Objective

To develop a comprehensive profile of items that describe how quality of life is associated with hearing loss and its treatments that can be used to generate hearing-related quality of life measures, including a novel utility measure.

Design, Setting, and Participants

This qualitative study, performed from August 1, 2018, to August 1, 2019, in tertiary referral centers, comprised a systematic literature review, focus groups, and semistructured interviews. The systematic review evaluated studies published from 1982 to August 1, 2018. Focus groups included 8 clinical experts experienced in the measurement, diagnosis, treatment, and rehabilitation of hearing loss. Semistructured interviews included 26 adults with hearing loss recruited from an institutional data set and outpatient hearing aid and otology clinics using stratified convenience sampling to include individuals of diverse ages, urban and rural residency, causes of hearing loss, severity of hearing loss, and treatment experience.

Main Outcomes and Measures

A set of items and subdomains that collectively describe the association of hearing loss with health-related quality of life.

Results

The literature search yielded 2779 articles from the MEDLINE, Embase, Cochrane, PsycINFO, and CINAHL databases. Forty-five studies including 1036 individuals (age range, 18-84 years) were included. The focus group included 4 audiologists and 4 otologists. Hour-long semistructured interviews were conducted with 26 individuals (13 women; median age, 54 years; range, 25-83 years) with a broad range of hearing loss causes, configurations, and severities. From all 3 sources, a total of 125 items were generated and organized into 29 subdomains derived from the World Health Organization's International Classification of Functioning, Disability and Health.

Conclusions and Relevance

The association of hearing loss with quality of life is multidimensional and includes subdomains that are not considered in the estimation of health utility by existing utility measures. The presented comprehensive profile of items can be used to generate or evaluate measures of hearing-related quality of life, including utility measures.

The effect of tinnitus on hearing-related quality of life outcomes in adult cochlear implant recipients

OBJECTIVE

To describe the effect of tinnitus distress on the hearing-related quality of life (QoL) outcomes over time in adult cochlear implant (CI) recipients.

DESIGN

A retrospective, longitudinal study of adult CI recipients was conducted. Hearing-related QoL and tinnitus distress were assessed using the Abbreviated Profile of Hearing Aid Benefit (APHAB) and the Tinnitus Reaction Questionnaire (TRQ) preoperatively and at 6-months, 12-months and >24-month postoperatively. The association between tinnitus distress and hearing-related QoL outcomes over time was investigated. Furthermore, 13 potential predictive factors were identified from the retrospective dataset. Multiple regression analyses were performed to identify variables that influence hearing-related QoL outcomes over time.

STUDY SAMPLE

The study sample included 210 adult (≥18 years) CI recipients implanted between 2001 and 2017.

RESULTS

Lower tinnitus distress and younger age at implantation were significant predictors of better hearing-related QoL in adult CI recipients. A significant reduction in tinnitus distress up to two years post-implantation was found, as well as greater tinnitus distress correlating with poorer hearing-related QoL outcomes.

CONCLUSION

Tinnitus distress negatively affects the hearing-related QoL outcomes of adult CI recipients. Tinnitus distress and age at implantation were found to be significant predictors of hearing-related QoL when controlling for other predictive factors.

Single-centre experience and practical considerations of the benefit of a second cochlear implant in bilaterally deaf adults

Purpose

Bilateral cochlear implant (CI) implantation is increasingly used in the auditory rehabilitation of bilaterally deafened adults. However, after successful unilateral implantation, objective patient counselling is essential.

Methods

We investigated the extra benefit of a second CI in adults in terms of health-related quality of life, tinnitus, stress, anxiety, depression, quality of hearing, and speech recognition. Hearing ability was assessed by using the Freiburg monosyllable speech discrimination test (FB MS) and the Oldenburg sentence test with azimuth variations. In a prospective patient cohort, we administered validated questionnaires before a CI, after a first CI and after a second CI implantation.

Results

The study included 29 patients, made up of nine women and 20 men. The median time between the first and the second implantation was 23 months. The mean total NCIQ score and TQ before a CI improved significantly after both implantations. Stress, anxiety, and depression were stable over time and were not significantly affected by CI implantations. Speech recognition with noise significantly improved after the first and again after the second CI. Correlation analysis showed a strong connection between auditory performance and HRQoL.

Conclusion

We demonstrated that a unilateral CI benefitted many fields and that the second sequential CI leads again to additional improvement. Bilateral CI implantation should, therefore, be the standard form of auditory rehabilitation in deafened adults.

Systematic Review of Quality of Life Assessments after Cochlear Implantation in Older Adults

Cochlear implants (CI) have increasingly been adopted in older adults with severe to profound sensorineural hearing loss as a result of the growing and aging world population. Consequently, researchers have recently shown great interest in the cost-effectiveness of cochlear implantation and its effect on quality of life (QoL) in older CI users. Therefore, a systematic review and critical evaluation of the available literature on QoL in older adult CI users was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Studies were selected by searching MEDLINE (PubMed) and the Cochrane Library and by checking the reference lists of relevant articles. Inclusion criteria were as follows: (1) the study sample were adults aged 50 years and older with postlingual onset of bilateral severe to profound hearing loss, (2) all subjects received a multi-electrode CI, and (3) QoL was assessed before and after implantation. Out of 1,093 records, 18 articles were accepted for review. Several studies demonstrated significant positive effects of cochlear implantation on QoL in older adults, but high-level evidence-based medicine is lacking. An improvement of QoL was generally reported when using disease-specific instruments, which are designed to detect treatment-specific changes, whereas the outcomes of generic QoL questionnaires, assessing general health states, were rather ambiguous. However, only generic questionnaires would be able to provide calculations of the cost-effectiveness of CI and comparisons across patient populations, diseases, or interventions. Hence, generic and disease-specific QoL instruments are complementary rather than contradictory. In general, older CI users' QoL was assessed using a variety of methods and instruments, which complicated comparisons between studies. There is a need for a standardized, multidimensional, and comprehensive QoL study protocol including all relevant generic and disease-specific instruments to measure and compare QoL, utility, and/or daily life performance in CI users.

Long-term Benefit of Unilateral Cochlear Implantation on Quality of Life and Speech Perception in Bilaterally Deafened Patients

OBJECTIVE

Cochlear implantation (CI) is a common treatment modality for unilaterally and bilaterally deafened patients as well as patients with severe to profound hearing loss. The aim of our study is the complex evaluation of the improvement and influence of health related quality of life (HRQoL) and auditory performance in cochlear implant patients during a long-term follow-up.

METHODS

Sixty-one bilaterally, postlingually deafened patients with unilateral CI were included in this prospective study. Assessment tools for auditory performance and HRQoL included the Freiburg Monosyllabic Speech test, Oldenburg Inventory (OI) questionnaire, Nijmegen Cochlear Implant Questionnaire (NCIQ) and 36-item Short Form Survey (SF-36). Data were collected before CI, at 6, 12, and 24 months postoperatively.

RESULTS

The assessment tools for speech perception yielded a statistically significant improvement in the Freiburg Monosyllabic Speech test scores and of all subdomain scores of the OI during the 6-month follow-up period. The subdomain scores of the NCIQ and the psychological score of the SF-36 also improved significantly during this follow-up period. All results remained stable thereafter during the 12- and 24-month follow-up. There was a statistically significant correlation between subjective speech perception and HRQoL after CI.

CONCLUSION

This is the first prospective study to show results in regard to speech perception and HRQoL and their correlation during a 2-year follow-up after unilateral CI in bilaterally deafened patients. Our results for speech perception and HRQoL showed a significant improvement during the 6-month follow-up that remained stable thereafter during a 24-month follow-up, even after finishing the hearing rehabilitation program.

How Does Quality of Life Relate to Auditory Abilities? A Subitem Analysis of the Nijmegen Cochlear Implant Questionnaire

BACKGROUND

Objective speech recognition tasks are widely used to measure performance of adult cochlear implant (CI) users; however, the relationship of these measures with patient-reported quality of life (QOL) remains unclear. A comprehensive QOL measure, the Nijmegen Cochlear Implant Questionnaire (NCIQ), has historically shown a weak association with speech recognition performance, but closer examination may indicate stronger relations between QOL and objective auditory performance, particularly when examining a broad range of auditory skills.

PURPOSE

The aim of the present study was to assess the NCIQ for relations to speech and environmental sound recognition measures. Identifying associations with certain QOL domains, subdomains, and subitems would provide evidence that speech and environmental sound recognition measures are relevant to QOL. A lack of relations among QOL and various auditory abilities would suggest potential areas of patient-reported difficulty that could be better measured or targeted.

RESEARCH DESIGN

A cross-sectional study was performed in adult CI users to examine relations among subjective QOL ratings on NCIQ domains, subdomains, and subitems with auditory outcome measures.

STUDY SAMPLE

Participants were 44 adult experienced CI users. All participants were postlingually deafened and had met candidacy requirements for traditional cochlear implantation.

DATA COLLECTION AND ANALYSIS

Participants completed the NCIQ as well as several speech and environmental sound recognition tasks: monosyllabic word recognition, standard and high-variability sentence recognition, audiovisual sentence recognition, and environmental sound identification. Bivariate correlation analyses were performed to investigate relations among patient-reported NCIQ scores and the functional auditory measures.

RESULTS

The total NCIQ score was not strongly correlated with any objective auditory outcome measures. The physical domain and the advanced sound perception subdomain related to several measures, in particular monosyllabic word recognition and AzBio sentence recognition. Fourteen of the 60 subitems on the NCIQ were correlated with at least one auditory measure.

CONCLUSIONS

Several subitems demonstrated moderate-to-strong correlations with auditory measures, indicating that these auditory measures are relevant to the QOL. A lack of relations with other subitems suggests a need for the development of objective measures that will better capture patients' hearing-related obstacles. Clinicians may use information obtained through the NCIQ to better estimate real-world performance, which may support improved counseling and development of recommendations for CI patients.

Health-related quality of life in South African children who use cochlear implants

Objective: To describe health-related quality of life (HRQoL) outcomes of school-going paediatric cochlear implant (CI) recipients in a South African cohort from the perspectives of parents.Design: Parents of school-going CI recipients completed the Children with Cochlear Implants: Parental Perspectives (CCIPP) CI-specific HRQoL questionnaire. The effect of different demographic variables on HRQoL outcomes was also determined.Study sample: The study sample included 54 parents of school-going (mean age = 12.2 years; SD = 3.6; range = 6.6-18.3 years) CI recipients with at least six months CI experience.Results: Children's communication and general functioning with a CI received the most positive parental ratings. Among a number of confirmed statistically significant (p < 0.05) associations between HRQoL outcomes and demographic variables, pre-lingual onset of deafness was linked to better HRQoL in terms of general functioning and well-being. While shorter duration of deafness and unilateral implantation were associated with higher parental ratings for self-reliance and well-being respectively, longer duration of CI use was linked to improved HRQoL outcomes in terms of general functioning.Conclusion: Parents assigned positive ratings to their child's HRQoL. This exploration of children's HRQoL related to their CIs contributes to evidence-based paediatric CI services that promote optimal psychosocial outcomes.

Do Personality Factors Assessed Before Cochlear Implantation Predict Hearing-Related Quality Of Life After Cochlear Implantation in Postlingually Deafened Adults?

BACKGROUND

Studies have shown that cochlear implants improve deaf patients' hearing-related quality of life (hrQoL), but the degree of improvement varies considerably between patients. This study investigated whether personality factors contribute to hrQoL outcome after cochlear implantation.

METHOD

Fifty adult patients with postlingual hearing loss who received a unilateral cochlear implant were administered the Neuroticism-Extraversion-Openness Five-Factor Inventory (NEO-FFI; a personality inventory) and the Nijmegen Cochlear Implant Questionnaire (NCIQ; a hrQoL questionnaire). The NEO-FFI was administered only before implantation; the NCIQ was administered before implantation and 12 months after implant activation. A linear regression analysis was computed to detect whether NCIQ scores at 12 months were predicted by the NEO-FFI personality factors (i.e., Extraversion, Neuroticism, Openness to Experience, Agreeableness, and Conscientiousness) assessed before implantation.

RESULTS

HrQoL scores had significantly improved 12 months after cochlear implantation in all subdomains of the NCIQ. Of the five personality factors, solely Neuroticism was negatively associated to the NCIQ subdomain self-esteem (β = -0.34; p = 0.013) at 12 months after cochlear implantation.

CONCLUSIONS

While significant improvement of hrQoL was seen 12 months after implant activation, this improvement was barely predicted by the Big-Five personality traits measured before implantation. Only Neuroticism was found to moderately influence postimplantation hrQoL in our patients, in the way that higher degrees of Neuroticism tend to go along with lower degrees of self-esteem (as conceptualized by the NCIQ). The failure to detect personality effects on hrQoL could partly be due to the low levels of Extraversion and Openness to Experience observed in our sample of patients with hearing loss.

[Hearing rehabilitation with cochlear implants and cognitive abilities]

The relevance of assessing cognitive functioning is increasing against the background of the continuing demographic changes. Up to a few years ago the focus was on the effects of cochlear implantation in children born deaf in comparison to healthy individuals. Currently, the question arises whether hearing rehabilitation in the elderly, e.g. by postlingual cochlear implantation, has a protective effect on cognitive functioning and therefore on the risk of onset of dementia. This review describes the association of cognitive functioning with hearing disorders and cochlear implantation. Historical aspects of intelligence testing are illustrated. Knowledge on cognitive aspects in elderly persons with hearing disorders and cochlear implants is rare in the currently available literature. Initial findings indicate a positive correlation between hearing improvement and cognitive functioning. Further studies are urgently required in order to elucidate appropriate guidelines for the treatment of patients with cognitive deficits and hearing impairment.

No Difference in Behavioral and Self-Reported Outcomes for Simultaneous and Sequential Bilateral Cochlear Implantation: Evidence From a Multicenter Randomized Controlled Trial

Objective: The primary aim of this study was to longitudinally compare the behavioral and self-reported outcomes of simultaneous bilateral cochlear implantation (simBiCI) and sequential BiCI (seqBiCI) in adults with severe-to-profound postlingual sensorineural hearing loss. Design: This study is a multicenter randomized controlled trial with a 4-year follow-up period after the first moment of implantation. Participants were allocated by randomization to receive bilateral cochlear implants (CIs) either, simultaneously (simBiCI group) or sequentially with an inter-implant interval of 2 years (UCI/seqBiCI group). All sequential patients where encouraged to use their hearing aid on the non-implanted ear over of the first 2 years. Patients were followed-up on an annual basis. The primary outcome was speech perception in noise coming from a source directly in front of the patient. Other behavioral outcome measures were speech intelligibility-in-noise from spatially separated sources, localization and speech perception in quiet. Self-reported outcome measures encompassed questionnaires on quality of life, quality of hearing and tinnitus. All outcome measures were analyzed longitudinally using a linear or logistic regression analysis with an autoregressive residual covariance matrix (generalized estimating equations type). Results: Nineteen participants were randomly allocated to the simBiCI group and 19 participants to the UCI/seqBiCI group. Three participants in the UCI/seqBiCI group did not proceed with their second implantation and were therefore unavailable for follow-up. Both study groups performed equally well on speech perception in noise from a source directly in front of the patient longitudinally. During all 4 years of follow-up the UCI/seqBiCI group performed significantly worse compared to the simBiCI group on spatial speech perception in noise in the best performance situation (8.70 dB [3.96 - 13.44], p < 0.001) and localization abilities (largest difference 60 degrees configuration: -44.45% [-52.15 - -36.74], p < 0.0001). Furthermore, during all years of follow-up, the UCI/seqBiCI group performed significantly worse on quality of hearing and quality of life questionnaires. The years of unilateral CI use were the reason for the inferior results in the UCI/SeqBiCI group. One year after receiving CI2, the UCI/seqBiCI group performance did not statistically differ from the performance of the simBiCI group on all these outcomes. Furthermore, no longitudinal differences were seen in tinnitus burden prevalence between groups. Finally, the complications that occurred during this trial were infection, dysfunction of CI, facial nerve palsy, tinnitus and vertigo. Conclusion: This randomized controlled trial on bilaterally severely hearing impaired participants found a significantly worse longitudinal performance of UCI/seqBiCI compared to simBiCI on multiple behavioral and self-reported outcomes regarding speech perception in noise and localization abilities. This difference is associated with the inferior performance of the UCI/seqBiCI participants during the years of unilateral CI use. After receiving the second CI however, the performance of the UCI/seqBiCI group did not significantly differ from the simBiCI group. Trial Registration: Dutch Trial Register NTR1722.

Meta-analysis of quality-of-life improvement after cochlear implantation and associations with speech recognition abilities

OBJECTIVES

Determine the impact of cochlear implantation on quality of life (QOL) and determine the correlation between QOL and speech recognition ability.

STUDY DESIGN

Two authors independently searched PubMed, Medline, Scopus, and the Cumulative Index to Nursing and Allied Health Literature to identify studies reporting hearing-specific or cochlear implant (CI)-specific QOL outcomes before and after cochlear implantation, and studies reporting correlations between QOL and speech recognition after cochlear implantation. Data from the included articles were obtained independently by two authors. Standardized mean difference (SMD) for each measure and pooled effects were determined to assess improvement in QOL before and after cochlear implantation.

RESULTS

From 14 articles with 679 CI patients who met the inclusion criteria, pooled analyses of all hearing-specific QOL measures revealed a very strong improvement in QOL after cochlear implantation (SMD = 1.77). Subset analysis of CI-specific QOL measures also showed very strong improvement (SMD = 1.69). Thirteen articles with 715 patients met the criteria to evaluate associations between QOL and speech recognition. Pooled analyses showed a low positive correlation between hearing-specific QOL and word recognition in quiet (r = 0.213), sentence recognition in quiet (r = 0.241), and sentence recognition in noise (r = 0.238). Subset analysis of CI-specific QOL showed similarly low positive correlations with word recognition in quiet (r = 0.213), word recognition in noise (r = 0.241), and sentence recognition in noise (r = 0.255).

CONCLUSIONS

Using hearing-specific and CI-specific measures of QOL, patients report significantly improved QOL after cochlear implantation. However, widely used clinical measures of speech recognition are poor predictors of patient-reported QOL with CIs. Laryngoscope, 128:982-990, 2018.

Tinnitus after Simultaneous and Sequential Bilateral Cochlear Implantation

Importance

There is an ongoing global discussion on whether or not bilateral cochlear implantation should be standard care for bilateral deafness. Contrary to unilateral cochlear implantation, however, little is known about the effect of bilateral cochlear implantation on tinnitus.

Objective

To investigate tinnitus outcomes 1 year after bilateral cochlear implantation. Secondarily, to compare tinnitus outcomes between simultaneous and sequential bilateral cochlear implantation and to investigate long-term follow-up (3 years).

Study design

This study is a secondary analysis as part of a multicenter randomized controlled trial.

Methods

Thirty-eight postlingually deafened adults were included in the original trial, in which the presence of tinnitus was not an inclusion criterion. All participants received cochlear implants (CIs) because of profound hearing loss. Nineteen participants received bilateral CIs simultaneously and 19 participants received bilateral CIs sequentially with an inter-implant interval of 2 years. The prevalence and severity of tinnitus before and after simultaneous and sequential bilateral cochlear implantation were measured preoperatively and each year after implantation with the Tinnitus Handicap Inventory (THI) and Tinnitus Questionnaire (TQ).

Results

The prevalence of preoperative tinnitus was 42% (16/38). One year after bilateral implantation, there was a median difference of -8 (inter-quartile range (IQR): -28 to 4) in THI score and -9 (IQR: -17 to -9) in TQ score in the participants with preoperative tinnitus. Induction of tinnitus occurred in five participants, all in the simultaneous group, in the year after bilateral implantation. Although the preoperative and also the postoperative median THI and TQ scores were higher in the simultaneous group, the median difference scores were equal in both groups. In the simultaneous group, tinnitus scores fluctuated in the 3 years after implantation. In the sequential group, four patients had an additional benefit of the second CI: a total suppression of tinnitus compared with their unilateral situation.

Conclusion

While bilateral cochlear implantation can have a positive effect on preoperative tinnitus complaints, the induction of (temporary or permanent) tinnitus was also reported.

Clinical Trial Registration

Dutch Trial Register NTR1722.

Cochlear Implantation of Bilaterally Deafened Patients with Tinnitus Induces Sustained Decrease of Tinnitus-Related Distress

Objective

Tinnitus is a common symptom of hearing impairment. Patients who are bilaterally hard of hearing are often affected by tinnitus. However, they cannot undergo any of the standard tinnitus therapies, since they rely on hearing. Cochlear implantation (CI) used to treat severe hearing disabilities, such as bilateral hearing loss, was also shown to reduce tinnitus. Our goal was to determine if CI induces sustained reduction of tinnitus. We performed prospective, longitudinal analyses of tinnitus-related distress in a uniform group of bilaterally deafened patients after CI.

Patients and Methods

The homogenous sample consisted of 41 patients who met the inclusion criteria and were consecutively included in this study. The impact of unilateral CI on tinnitus-related distress, health-related quality of life (HRQoL), and hearing abilities was studied with validated instruments. The follow-up appointments were scheduled at 6, 12, and 24 months after CI surgery. During the appointments, hearing abilities were estimated with monosyllabic Freiburg test, whereas the tinnitus-related distress, the HRQoL, and the subjective hearing were measured with standard questionnaires [Tinnitus Questionnaire (TQ), Nijmegen Cochlear Implantation Questionnaire, and Oldenburg Inventory, respectively].

Results

Tinnitus-related distress decreased significantly from the mean TQ score of 35.0 (SD = 19.6) prior to surgery to the mean TQ = 27.54 (SD = 20.0) 6 months after surgery and remained sustained low until the end of follow-up period. In addition, CI significantly improved the hearing abilities and the HRQoL of all patients.

Conclusion

The results from our prospective study suggest that in a homogenous sample of bilaterally deafened, implanted patients who report having tinnitus prior to surgery, CI alone not only improves the hearing abilities but also significantly reduces the tinnitus-related distress and improves the HRQoL in a sustained way.

United Kingdom national paediatric bilateral project: Results of professional rating scales and parent questionnaires

OBJECTIVES

This fourteen-centre project used professional rating scales and parent questionnaires to assess longitudinal outcomes in a large non-selected population of children receiving simultaneous and sequential bilateral cochlear implants.

METHODS

This was an observational non-randomized service evaluation. Data were collected at four time points: before bilateral cochlear implants or before the sequential implant, one year, two years, and three years after. The measures reported are Categories of Auditory Performance II (CAPII), Speech Intelligibility Rating (SIR), Bilateral Listening Skills Profile (BLSP) and Parent Outcome Profile (POP).

RESULTS

Thousand and one children aged from 8 months to almost 18 years were involved, although there were many missing data. In children receiving simultaneous implants after one, two, and three years respectively, median CAP scores were 4, 5, and 6; median SIR were 1, 2, and 3. Three years after receiving simultaneous bilateral cochlear implants, 61% of children were reported to understand conversation without lip-reading and 66% had intelligible speech if the listener concentrated hard. Auditory performance and speech intelligibility were significantly better in female children than males. Parents of children using sequential implants were generally positive about their child's well-being and behaviour since receiving the second device; those who were less positive about well-being changes also generally reported their children less willing to wear the second device.

CONCLUSION

Data from 78% of paediatric cochlear implant centres in the United Kingdom provide a real-world picture of outcomes of children with bilateral implants in the UK. This large reference data set can be used to identify children in the lower quartile for targeted intervention.

Evidence and evidence gaps in tinnitus therapy

A nearly endless number of procedures has been tried and in particular sold for the treatment of tinnitus, unfortunately they have not been evaluated appropriately in an evidence-based way. A causal therapy, omitting the tinnitus still does not exist, actually it cannot exist because of the various mechanisms of its origin. However or perhaps because of that, medical interventions appear and reappear like fashion trends that can never be proven by stable and reliable treatment success. This contribution will discuss and acknowledge all current therapeutic procedures and the existing or non-existing evidence will be assessed. Beside external evidence, the term of evidence also encompasses the internal evidence, i.e. the experience of the treating physician and the patient's needs shall be included. While there is no evidence for nearly all direct procedures that intend modulating or stimulating either the cochlea or specific cervical regions such as the auditory cortex, there are therapeutic procedures that are acknowledged in clinical practice and have achieved at least a certain degree of evidence and generate measurable effect sizes. Those are in particular habituation therapy and psychotherapeutic measures, especially if they are combined with concrete measures for improved audio perception (hearing aids, CI, hearing therapies).

Genetics of Tinnitus: An Emerging Area for Molecular Diagnosis and Drug Development

Subjective tinnitus is the perception of sound in the absence of external or bodily-generated sounds. Chronic tinnitus is a highly prevalent condition affecting over 70 million people in Europe. A wide variety of comorbidities, including hearing loss, psychiatric disorders, neurodegenerative disorders, and temporomandibular joint (TMJ) dysfunction, have been suggested to contribute to the onset or progression of tinnitus; however, the precise molecular mechanisms of tinnitus are not well understood and the contribution of genetic and epigenetic factors remains unknown. Human genetic studies could enable the identification of novel molecular therapeutic targets, possibly leading to the development of novel pharmaceutical therapeutics. In this article, we briefly discuss the available evidence for a role of genetics in tinnitus and consider potential hurdles in designing genetic studies for tinnitus. Since multiple diseases have tinnitus as a symptom and the supporting genetic evidence is sparse, we propose various strategies to investigate the genetic underpinnings of tinnitus, first by showing evidence of heritability using concordance studies in twins, and second by improving patient selection according to phenotype and/or etiology in order to control potential biases and optimize genetic data output. The increased knowledge resulting from this endeavor could ultimately improve the drug development process and lead to the preventive or curative treatment of tinnitus.

[Cochlear implants and tinnitus]

The cochlear implant became a very successful method of hearing rehabilitation for patients with profound sensorineural hearing loss. The benefits of the CI extend beyond the medical success and positively influence social and psychosocial areas, reflected by an improved HRQoL. Furthermore, variety of studies demonstrated that the tinnitus severity improves in 46-95 % of cases following the cochlear implantation. However, the parameters investigated in such studies are not always standardized or addressed by validated questionnaires, which explains the high outcome variation between the studies. The relationships between HRQoL and tinnitus distress before and after cochlear implantation have not been well studied. Nevertheless, it is believed that the improvement in HRQoL following CI affects particularly tinnitus.However, an existing tinnitus can also worsen or occur for the first time after the surgery. Since neither tinnitus frequency nor tinnitus loudness correlate with the tinnitus-induced distress, the measurement of HRQoL, distress factors, stress reactions and psychiatric comorbidities appears to be the meaningful assessment of positive or negative effects of CI on tinnitus.Initial studies demonstrated that also patients with unilateral hearing loss may benefit from CI supply, as shown by an improvement in HRQoL and reduction of tinnitus-induced distress. For those patients, who despite CI implantation experience severe tinnitus, there is an option of tinnitus-specific CI-fitting and tinnitus-specific therapy with psychosomatic and psychological approaches, and- in addition- a treatment of possible mental comorbidities.

Sequential bilateral cochlear implantation improves working performance, quality of life, and quality of hearing

CONCLUSIONS

This prospective study shows that working performance, quality of life (QoL), and quality of hearing (QoH) are better with two compared with a single cochlear implant (CI). The impact of the second CI on the patient's QoL is as significant as the impact of the first CI.

OBJECTIVES

To evaluate the benefits of sequential bilateral cochlear implantation in working, QoL, and QoH.

METHODS

We studied working performance, work-related stress, QoL, and QoH with specific questionnaires in 15 patients with unilateral CI scheduled for sequential CI of another ear. Sound localization performance and speech perception in noise were measured with specific tests. All questionnaires and tests were performed before the second CI surgery and 6 and 12 months after its activation.

RESULTS

Bilateral CIs increased patients' working performance and their work-related stress and fatigue decreased. Communication with co-workers was easier and patients were more active in their working environment. Sequential bilateral cochlear implantation improved QoL, QoH, sound localization, and speech perception in noise statistically significantly.

The advantages of sound localization and speech perception of bilateral electric acoustic stimulation

CONCLUSION

Bilateral electric acoustic stimulation (EAS) effectively improved speech perception in noise and sound localization in patients with high-frequency hearing loss.

OBJECTIVE

To evaluate bilateral EAS efficacy of sound localization detection and speech perception in noise in two cases of high-frequency hearing loss.

METHODS

Two female patients, aged 38 and 45 years, respectively, received bilateral EAS sequentially. Pure-tone audiometry was performed preoperatively and postoperatively to evaluate the hearing preservation in the lower frequencies. Speech perception outcomes in quiet and noise and sound localization were assessed with unilateral and bilateral EAS.

RESULTS

Residual hearing in the lower frequencies was well preserved after insertion of a FLEX(24) electrode (24 mm) using the round window approach. After bilateral EAS, speech perception improved in quiet and even more so in noise. In addition, the sound localization ability of both cases with bilateral EAS improved remarkably.

Quality of life in bimodal hearing users (unilateral cochlear implants and contralateral hearing aids)

The main objective was to evaluate the bimodal self-rated benefits on auditory performance under real conditions and the quality of life in two groups of cochlear-implanted adults, with or without a contralateral hearing aid. The secondary objective was to investigate correlations between the use of a hearing aid and residual hearing on the non-implanted ear. This retrospective study was realized between 2000 and 2010 in two referral centers. A population of 183 postlingually deaf adults, implanted with a cochlear experience superior to 6 months, was selected. The Speech, Spatial, and other Qualities of Hearing Scale were administered to evaluate the auditory performances, and the Nijmegen Cochlear Implant Questionnaire to evaluate the quality of life. The population was divided into two groups: a group with unilateral cochlear implants (Cochlear Implant-alone, n = 54), and a bimodal group with a cochlear implant and a contralateral hearing aid (n = 62). Both groups were similar in terms of auditory deprivation duration, duration of cochlear implant use, and pure-tone average on the implanted ear. There was a significant difference in terms of pure-tone average on low and low-to-mid frequencies on the non-implanted ear. The scores on both questionnaires showed an improvement in the basic sound perception and quality of social activities for the bimodal group. The results suggest that the bimodal stimulation (cochlear implant and contralateral hearing aid) improved auditory perception in quiet and the quality of life domain of social activities.

Differences in perception of hearing handicap between cochlear implant users and their spouses

OBJECTIVES/HYPOTHESIS

To examine the relationship between patient and proxy ratings of health-related quality of life (HRQL) in patients with cochlear implants.

STUDY DESIGN

Prospective survey.

METHODS

Eighty-two adult cochlear implant recipients and their spouses/partners were asked to complete the Nijmegen Cochlear Implant Questionnaire (NCIQ) and the Hearing Participation Scale (HPS) that were mailed to them.

RESULTS

For the NCIQ, there were 38 useable responses from recipients and 31 useable responses from the partners. There were 27 paired and useable questionnaires (i.e., from both the recipient and his/her partner). For the HPS, there were 42 useable responses from recipients and 36 useable responses from the partners. Of these, there were 35 paired questionnaires. There was good agreement between partners and patients with both the HPS (r = 0.62) and the NCIQ (r = 0.80). There was a significant statistical difference in the scoring of the Basic Sound Perception subscale between the two groups (P = .039), with spouses under-rating performance in this subscale.

CONCLUSIONS

For patients with cochlear implants, patients' partners corroborate patients' self-reported HRQL. In cases in which patients have sensory impairment, there may be an additional role for proxy ratings of HRQL to give a more complete assessment of functional limitations.