Deafblindness and dual sensory loss research: Current status and future directions

The relationship between sensory impairment and home care client's received care time-A cross-sectional study

AIM

The aim of this study was to explore the relationship between sensory impairment and home care client's received care time.

DESIGN

A cross-sectional multi-source study.

METHODS

Data from a self-reported staff survey on care time allocation were merged with registry data from the Resident Assessment Instrument registry (n = 1477). The data were collected during 1 week from 17 home care units in Finland in October 2021. The relationship between sensory impairment and clients received care time was examined using linear regression analyses.

RESULTS

The linear regression analyses showed that having vision impairment alone increased care time, while dual sensory impairment resulted in decreased received care time. Hearing impairment alone was not statistically significantly associated with care time.

CONCLUSION

The holistic care need of home care clients with dual sensory impairment may not be adequate. To ensure equality and the individually tailored care of clients, further attention must be paid to clients with sensory impairments, especially those with dual sensory impairment. Furthermore, the competence of home care workers to encounter and communicate with clients with sensory impairment must be developed to support the holistic care.

IMPLICATIONS FOR THE PATIENT CARE

The sensory impairments of home care clients must be identified in time and considered in care planning and encountering clients.

IMPACT

As there is a risk that clients with dual sensory impairment are not able to fully express themselves, it is imperative that further attention is paid to clients with sensory impairments, to better understand and support this vulnerable group. Increased awareness and continuous education are needed to better identify and support home care clients with sensory impairment.

REPORTING METHOD

The study adheres to the STROBE reporting guidelines.

PATIENT OR PUBLIC CONTRIBUTION

No patient or public contribution.

Interventions to improve social network in older people with sensory impairment: a systematic review

BACKGROUND

Sensory impairment significantly reduces speech discrimination and perception ability, presenting a challenge to effective communication. It can lead to social withdrawal and a reduced social network which can lead to cognitive impairment, seriously affecting the quality of life of older people. However, it is unclear which intervention components are effective to improving social network in older people with sensory impairment.

OBJECTIVE

The aim of this systematic review was to summarize interventions designed to improve social network in older people with sensory impairment.

METHODS

We searched seven databases from inception to December 1, 2023. Eligible studies included randomized clinical trials (RCT) and quasi-experimental studies of interventions for older people with sensory impairment aimed at improving social networks. Two reviewers searched databases, extracted data, and assessed the quality of the included studies independently.

RESULTS

Nine studies including five RCTs and four quasi-experimental studies were selected, enrolling 721 older people with sensory impairment. Methodological quality of the studies was modest. Eight studies demonstrated a positive impact of the interventions used in older people with sensory impairment. The detailed effective intervention components may include communication strategies, resources for older people and their significant others, exercise or tech-back of communication, sensory device fitting, and use and maintenance of sensory devices.

CONCLUSION

There are few interventions available for improving social network in older people with sensory impairment. Most interventions mainly focus on communication education and care, and sensory device fitting and education. To improve the social network in older people with sensory impairment, it is necessary to develop more effective, multidisciplinary collaborative effective interventions and conduct more high-quality original studies.

Skin-Integrated Wireless Odor Message Delivery Electronics for the Deaf-blind

Deaf-blindness limits daily human activities, especially interactive modes of audio and visual perception. Although the developed standards have been verified as alternative communication methods, they are uncommon to the nondisabled due to the complicated learning process and inefficiency in terms of communicating distance and throughput. Therefore, the development of communication techniques employing innate sensory abilities including olfaction related to the cerebral limbic system processing emotions, memories, and recognition has been suggested for reducing the training level and increasing communication efficiency. Here, a skin-integrated and wireless olfactory interface system exploiting arrays of miniaturized odor generators (OGs) based on melting/solidifying odorous wax to release smell is introduced for establishing an advanced communication system between deaf-blind and non-deaf-blind. By optimizing the structure design of the OGs, each OG device is as small as 0.24 cm3 (length × width × height of 11 mm × 10 mm × 2.2 mm), enabling integration of up to 8 OGs on the epidermis between nose and lip for direct and rapid olfactory drive with a weight of only 24.56 g. By generating single or mixed odors, different linked messages could be delivered to a user within a short period in a wireless and programmable way. By adopting the olfactory interface message delivery system, the recognition rates for the messages have been improved 1.5 times that of the touch-based method, while the response times were immensely decreased 4 times. Thus, the presented wearable olfactory interface system exhibits great potential as an alternative message delivery method for the deaf-blind.

Quality of Life in Deafblind People and Its Effect on the Processes of Educational Adaptation and Social Inclusion in Canary Islands, Spain

Deafblindness is a unique and complex disability. Research on the needs and quality of life are scarce; as well as the lack of adequate knowledge, training and lack of qualified professionals to serve this group. All this justifies the sense and interest of this study. This study is derived from the project with reference 2020EDU04. Design: The study is descriptive, cross-sectional and quantitative-qualitative research design was conducted. Objectives: Know and analyze the needs of adult deafblind people in order to contribute to improving their quality of life. Method: Sample of 16 adults with double sensory loss (hearing and vision) residing in the Autonomous Community of the Canary Islands (Spain) was used. Instruments: The FUMAT Scale was used to measure personal development; self-determination; interpersonal relationships; social inclusion; rights of deafblind people; emotional well-being; physical well-being and material well-being. In addition, a semi-structured interview is conducted. Results by dimensions: Personal development: The professionals did not have specialized training to provide an educational response. Physical well-being: 68% of the sample had other health problems associated with deafblindness. Interpersonal relationships: 100% of the sample reported communication problems in the family environment. Social inclusion: They reported difficulties in accessing educational and leisure activities. Material well-being: In general, they stated that they have the material resources necessary for their daily lives. Self-determination: they consider that they have decision-making capacity in basic aspects of daily life. Rights: Deafblind people state that they have limitations in exercising their rights. Based on the interviews, it was observed that the people with the greatest difficulties in daily life are those who presented the greatest visual commitment. Conclusion: The etiology does not determine the quality of life of deafblind people, but communication conditions interpersonal relationships and personal development, and therefore their quality of life.

A salutogenesis approach to ageing with impairment: the managing and coping experiences of older people ageing with deafblindness

An understanding of the psychosocial impact of deafblindness on older people is impoverished by a dearth of research in the field. Particularly limited are studies adopting a salutogenesis perspective, in which older deafblind people's coping capacities are explored. Much research focuses on vulnerability to unfavourable outcomes, which may perpetuate negative stereotypes of deafblind people as passive and dependent. Identifying deafblind people as a vulnerable group gives rise to misunderstanding of the impairment, perceptions of incapability and neglect of deafblind people's agency. This paper draws on data from the first United Kingdom-based study of vulnerability from the perspectives of older adults ageing with deafblindness. Findings presented here relate to participants’ experiences of managing and coping with their felt vulnerability and ageing with deafblindness. The study adopted interpretative phenomenological analysis (IPA) as its qualitative approach. In-depth semi-structured interviews were undertaken between October 2014 and July 2016 with eight participants, aged between 48 and 83 years. Data were analysed using an iterative six-step IPA process. Three superordinate themes were identified: taking action to protect self; psychological coping strategies; and accessing and using care and support. Participants’ managing and coping strategies, and the care and support they value, respond to elements identified as generating felt vulnerability. Professionals should seek to bolster coping capacity and provide support in ways valued by those ageing with deafblindness.

Prevalence of Individuals with Deafblindness and Age-Related Dual-Sensory Loss

Introduction

The authors of this paper have compiled a report on the prevalence of deafblindness and dual-sensory loss based on the review of existing estimates. The purpose is to inform readers of the importance of using consistent, well-researched definitions and survey questions in future prevalence studies.

Methods

Articles were extracted through ProQuest and EBSCOhost, online library databases of Cambrian College and Laurentian University. Keywords search included “deafblindness,” “dual-sensory impairment,” “dual-sensory loss,” “age-related,” “congenital,” “acquired,” and “prevalence.” Additionally, the authors conducted a search with Google for research reports and Google Scholar for other relevant peer-reviewed articles.

Results

This review provides a current overview of prevalence estimates of deafblindness and age-related dual-sensory loss around the world, examining 19 articles or reports published over the last 20 years (2000–2020) in 18 countries, including the European Union (consisting of 8 countries). In line with the prevalence estimates by the World Federation for the Deafblind global report 2018, the review indicates an estimated 0.2–2% prevalence of dual-sensory impairment and underscores varying ranges of prevalence among populations, studies or countries, age groups, and types of deafblindness. The review highlights that the prevalence of deafblindness or dual-sensory loss was often not comparable across studies, but it is clear that the prevalence of dual-sensory impairment increases with age. The studies varied in methods (e.g., population surveys, cross-sectional, and longitudinal studies).

Implication for practitioners

The review provides evidence of varying ranges of prevalence rates. Future prevalence studies may benefit from consistent definitions, standard data-collection tools to do better comparisons across countries, and identify factors that predict higher or lower prevalence rates among populations and age groups.

Factors that influence the participation of individuals with deafblindness: A qualitative study with rehabilitation service providers in India

Evidence to inform rehabilitation service delivery for individuals with deafblindness, especially in the Indian context, is inadequate. Rehabilitation professionals often find it challenging to design rehabilitation interventions that promote participation for those with deafblindness. Therefore, our purpose was to understand the contextual factors that influence the participation of individuals with deafblindness in India from the perspectives of those who are involved in providing rehabilitation services to them. Using the International Classification of Functioning, Disability, and Health (ICF) as a framework, we conducted two focus group discussions with 16 rehabilitation service providers in India. We used a content analysis approach to examine the data. Rehabilitation service providers perceived participation barriers to be linked primarily to the social environment. Specifically, participants identified four major factors acting as barriers, including (a) lack of awareness about deafblindness; (b) negative attitudes and stigma associated with disability; (c) lack of access to resources such as assistive technology and interpreter support; and (d) communication challenges associated with severe impairments. Facilitators include accessibility of the built environment for multisensory impairments, affordable technology, provision of an interpreter and personal support worker, and training on deafblindness for professionals. The participation of individuals with deafblindness could be enhanced by identifying and removing environmental barriers and improving knowledge about deafblindness among rehabilitation professionals for proper identification, assessment, and access to rehabilitation services.

Informed Consent or Assent Strategies for Research With Individuals With Deafblindness or Dual Sensory Impairment: A Scoping Review

OBJECTIVE

To synthesize evidence on existing informed consent/assent strategies and processes that enable the participation of individuazls with deafblindness or dual sensory impairment in research.

DATA SOURCES

Five scientific databases (PubMed, MEDLINE, Cumulative Index to Nursing and Allied Health, Web of Science, and PsycINFO) and other sources such as Google Scholar, Journal of Visual Impairment and Blindness, and British Journal of Visual Impairment were hand-searched from January 2015 until July 2020.

STUDY SELECTION

Studies were selected using a priori inclusion criteria of sensory and cognitive disabilities and focused on consent/assent strategies and processes in research within this population. Articles related to the medical or sexual consent processes were excluded.

DATA EXTRACTION

An Excel spreadsheet was used to extract data from the eligible sources. Discrepancies were resolved in discussion with team members.

DATA SYNTHESIS

A total of 2163 sources were screened, and 16 articles were included in the review. Seven sources only examined consent strategies, whereas the remaining 8 included a combination of consent/assent and dissent strategies. Using thematic analysis, 3 key themes emerged: consent/assent strategies, researcher capacity, and capacity to consent tools. Key identified strategies included the accessibility of the consent/assent process, building relationships with participants and caregivers, identifying behavioral cues, and communication training for researchers.

CONCLUSIONS

Despite the absence of literature on consent/assent strategies within the population with deafblindness, the review found promising strategies applied to individuals with other cognitive or sensory disabilities that researchers can adopt. Researchers are encouraged to use best practices in creating an inclusive research environment to include individuals with deafblindness.

Device abandonment in deafblindness: a scoping review of the intersection of functionality and usability through the International Classification of Functioning, Disability and Health lens

OBJECTIVES

Abandonment of vision, hearing or mobility aids suggests common barriers and facilitators to ongoing device use. However, the possible interactive effects of combined hearing and vision disabilities on device use by those living with deafblindness are unclear. Here we summarise existing knowledge on variables influencing assistive technology use from the perspective of persons living with deafblindness. We used the WHO's International Classification of Functioning, Disability and Health (ICF) framework to contextualise the findings, asking 'What is currently known about variables influencing the (non-)use of assistive devices recommended for persons with deafblindness?'

DESIGN

A scoping review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews Checklist.

DATA SOURCES

PubMed; ProQuest: ERIC; ProQuest Dissertation; ProQuest: Sociological Thesaurus; Web of Science; Scientific Electronic Library Online; Bielefeld Academic Search Engine; Pascal & Francis; APA PsycINFO and Ebsco for CINAHL were searched through 9 November 2020.

ELIGIBILITY CRITERIA

We included peer-reviewed studies that reported on assistive technology, device abandonment/utilisation and provided data from persons living with deafblindness.

DATA EXTRACTION AND SYNTHESIS

Four team members independently scored 83 studies for eligibility.

RESULTS

Ten articles were chosen for data extraction. The emerging variables replicated established categories of barriers and facilitators: personal, device-related, environmental and intervention variables. The use of the ICF highlighted how an intermediate variable (eg, device acceptability) was necessary in order for a variable to become a barrier or a facilitator to device use.

CONCLUSIONS

The variables influencing device use by persons with deafblindness followed the same categories described for single impairments. Usability was challenged in devices that rely on the 'other' sense. Haptic and tactile aids are rarely studied. The limited available information and the dire need for assistive technologies for people with deafblindness emphasises the urgency of research and technology development for this marginalised population.

GLOS: GLOve for Speech Recognition

Technological advancements in the field of Biomedical Engineering have allowed impaired individuals to use assistive devices in order to improve their quality of life. In the case of deafblind subjects, who experience both visual and auditory loss, the majority of available assistive devices are invasive (e.g. cochlear implants). Non-invasive technological improvements are extremely limited, in part due to the lack of scientific research interest in dual sensory loss [1]. In this paper we aim to present GLOS, a low-cost and non-invasive device that will allow the deafblind individuals to comprehend speeches in real-time. The proposed wearable device uses off-the-shelf components such as a Raspberry Pi 3 board, a simple microphone, and haptic feedback vibrating disks. The recorded speech from the microphone is processed by the board and encoded into 5 haptic vibrating modules attached to a glove. Each haptic vibrating module is placed on a different finger of the right hand. The current available non-invasive solutions do not use speech and therefore they do not allow for live communication (e.g. MyVox [2], Sparsha [3] and Mobile Lorm Glove [4]) or require long procedures to convert the messages (e.g. Finger Braille Teaching System [5]). This new biomedical device aims at overcoming these limitations. The authors tested the device in a preliminary testing and it was shown that GLOS has an average accuracy of 91.67% when tested for the recognition of twenty encoded sentences. The authors were deprived of both visual and hearing inputs and were trained for half hour per day for a period of 30 days.

Using the ICF to Identify Contextual Factors That Influence Participation of Persons With Deafblindness

OBJECTIVE

To identify and describe the contextual factors that influence the participation of people with deafblindness in India.

DESIGN

Qualitative study, using directed content analysis approach and the International Classification of Functioning, Disability and Health (ICF) as a framework to analyze the data.

SETTING

Community and social participation settings.

PARTICIPANTS

Community-dwelling individuals with deafblindness (N=16). Age ranges from 18-45 years.

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURES

Personal and environmental factors that influence the participation of individuals with deafblindness using the ICF framework.

RESULTS

Results indicate that the age of onset and nature of impairment (deafblindness) and willingness to explain the condition (functional consequences of deafblindness) emerged as important personal factors. Access to resources such as assistive technology, social support, and deafblind-specific services were found to be enablers of participation. Lack of services, systems, and policies specific to deafblindness along with negative societal attitude toward disability were highly perceived environmental barriers that influence participation of people with deafblindness in India.

CONCLUSIONS

Professionals must acknowledge aspects of the environment in conducting assessments and delivering interventions and understand the dynamic interactions between environment of the individual and his/her concurrent vision and hearing impairments. Approaches to enable participation require rehabilitation professionals to work with those with deafblindness to advocate for removal of environmental barriers and ensure provision of appropriate resources from the government to facilitate their participation. Social policy and government must ensure emphasis on awareness about deafblindness, access to deafblind-specific services, positive societal attitude, and opportunities for full participation for people with deafblindness in society.

Meaning and experiences of participation: a phenomenological study with persons with deafblindness in India

Purpose: Deafblindness, also known as dual sensory loss, creates a distinct condition more disabling than either deafness or blindness alone. The participation experiences of persons with deafblindness have not been understood well. This phenomenological study aims to understand the meanings of participation for persons with deafblindness and identify the domains of life that are important to them.Methods: We used the International Classification of Functioning, Disability and Health as a guiding framework. Sixteen adults with deafblindness were interviewed between March and May 2017 in India using a qualitative interview guide.Results: Findings suggest participation as a dynamic, individualized construct that is not just an end outcome. Rather, it is a means to achieve other goals important to the participants such as gaining respect, autonomy, independence, support and relationships, to fulfill aspirations and responsibilities, and to feel included and recognized in society. Life domains that they deemed important for participation were communication and access to information, mobility, relationships, education and productivity, and recreation and leisure.Conclusions: In order to enhance societal participation of people with deafblindness, a significant change in the focus of rehabilitation services is required which involves professionals viewing participation as both a means and an end outcome while designing interventions.

Participation experiences of people with deafblindness or dual sensory loss: A scoping review of global deafblind literature

Background

Deafblindness, also known as dual sensory loss, is a varying combination of visual and hearing impairment in the same individual. Interest in this topic has increased recently due to evidence suggesting an increase in prevalence of this condition among older adults. Persons with deafblindness frequently experience participation barriers and social isolation. Developing an understanding of their experiences can inform the design of programs and policies to enhance participation of people with deafblindness in society.

Objective

To identify and summarize available research literature on participation experiences of people with deafblindness or dual sensory loss.

Methods

A comprehensive literature search of eight databases (CINAHL/EBSCO, Embase, ERIC, Global Health, MEDLINE, ProQuest, PsycINFO, PubMed) was performed in accordance with the Preferred Reporting Items for Systematic Reviews (PRISMA) during January 2017 and last updated in June 2017. In addition, non-peer reviewed (grey) literature was also retrieved in the form of online published reports of research projects by 16 deafblind-specific organizations across the globe. To be included, sources had to be published after 1990, had persons with deafblindness as the focal population, and focused on their participation experiences.

Results

A total 1172 sources were identified of which 54 studies were included. The findings reveal that persons with deafblindness, regardless of origin of their impairment, experience difficulty in communication, mobility, daily living functioning, and social interactions. While these experiences may vary between individuals with congenital versus acquired conditions, they generally feel socially isolated, insecure and uncertain about their future.

Conclusion

Participation experiences of persons with deafblindness are shaped by dynamic interactions between personal factors (such as onset and type of impairments) and environmental influences (such as attitude, technology, and supports). A better understanding of participation experiences may help professionals in placing emphasis on affected participation domains to design services to enhance participation of people with deafblindness.

Aetiologies of acquired deafblindness in a national sample

The present study provides an overview of aetiologies and co-morbidities of acquired deafblindness in a Danish national sample of 514 individuals above 50 years of age identified with acquired deafblindness. Information was obtained from a survey and a register. The most frequent aetiology of vision loss was age-related macular degeneration (55.4%). The most frequent aetiology of hearing loss was presbycusis (53.7%). The most frequent aetiology of acquired deafblindness was the combination of age-related macular degeneration and presbycusis (41.5%). However, among the younger participants (50–59 years of age), Usher syndrome was the most common aetiology (62.5%). The aetiologies of acquired deafblindness are many and constituted by several different combinations of hearing and vision loss aetiologies. The most frequent aetiologies are age related.

One of society's most vulnerable groups? A systematically conducted literature review exploring the vulnerability of deafblind people

The vulnerability of deafblind people is considered axiomatic; they are seen not only as a vulnerable group but also as one of the most vulnerable. This paper aims to synthesise existing knowledge to determine what is known about such vulnerability. A comprehensive literature search was undertaken between April 2013 and May 2014. The review method was informed by systematic review principles. An approach based on a 'hierarchy of evidence' would have reduced the amount of literature reviewed significantly, to the point where synthesis would not be possible. Included material was appraised and an interpretative rather than aggregative approach to synthesis adopted. Drawing on principles of critical interpretive synthesis, rather than being a determiner of whether material should be included or excluded, a critique of the literature is offered within the synthesis. Twenty-eight references were identified for inclusion, originating from the UK, USA, Australia, Continental Europe and the Nordic Countries. No empirical studies specifically examining the experience of vulnerability of deafblind people were found. However, deafblind people describe feelings of vulnerability in studies exploring their experiences more generally, and in personal accounts of living with the impairment. Literature produced by practitioners and specialist organisations also explores the topic. Deafblind people are identified as a population 'at risk' of various adverse outcomes, particularly when compared to the non-deafblind majority, and deafblind people describe being and feeling vulnerable in various situations. The literature largely relates to negative outcomes and includes significantly less exploration of positive risk taking, coping capacity and resilience. Deafblind people do not appear to describe themselves as being vulnerable as a permanent state, suggesting a need for greater exploration of the experience among all sections of this heterogeneous population, with consideration of the concepts of resilience and coping capacity.

Ageing with a unique impairment: a systematically conducted review of older deafblind people's experiences

Little is known about the experiences of people ageing with impairments; social gerontology has largely focused on those ageing into disability rather than those ageing with disability. This paper synthesises existing knowledge to determine what is known about the experiences of those ageing with deafblindness. A comprehensive literature search was undertaken between April 2013 and May 2014. The review method was informed by systematic review principles. A total of 24 references were identified for inclusion. No studies examining deafblind people's experience of ageing and old age specifically were found, suggesting that those ageing with deafblindness are an under-studied sub-group within the deafblind population. However, deafblind people describe ageing experiences in studies exploring their lives generally, and in personal accounts of living with the impairment. Practitioner-authored material also explores the topic. Similarities in experience were identified between those ageing with deafblindness and those ageing with other impairments: ongoing change and consequent need for adaptation; a particular relationship between ageing and impairment; a sense that whilst one can learn adaptive strategies having lived with impairment for many years, it does not necessarily get easier; and a particular relationship with care and support services. These experiences illustrate the unique nature of ageing with impairment, and challenge gerontologists to engage in further research and theorising in the field of disability in later life.