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Overview of Hearing Loss in the Elderly Molinier CE*, Gallois Y, Marx M and Fraysse B Polygenicity [7]

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Overview of Hearing Loss in the Elderly Molinier CE*, Gallois Y, Marx M and Fraysse B Polygenicity [7] Open Access Gerontology & Geriatrics: Research Special Article - Hearing Loss Overview of Hearing Loss in the Elderly Molinier CE*, Gallois Y, Marx M and Fraysse B polygenicity [7]. At present, a genetic examination is not systematically Department of Otoneurology-Head and Neck Surgery, conducted in the context of classical presbycusis. Pierre-Paul Riquet University Hospital Center of Toulouse, France Screening for hearing loss *Corresponding author: Charles-Edouard Molinier, There is no universal screening system for adults as hearing loss is Department of Otoneurology-Head and Neck Surgery, currently defined by general practitioners, ENT specialists or hearing Pierre-Paul Riquet University Hospital Center, France aid acousticians on request by the patient or family. Received: December 11, 2019; Accepted: January 03, WHO-sponsored awareness days such as World Hearing Day, 2020; Published: January 10, 2020 held on March 3rd each year, provide free screening for patients at Introduction participating centers in many countries. The gold standard in the diagnosis of presbycusis is still tonal Deafness is a major public health issue worldwide. According to and vocal audiometry. Therefore, presbycusis appears to be bilateral the World Health Organization (WHO), of all diseases it is the 4th symmetrical sensorineural hearing loss that is predominant in high leading cause of morbidity. The WHO defines hearing loss as a loss of frequencies on tonal audiometry. Speech audiometry identifies more than 25dB in the ear with best hearing. Deafness is considered difficulties in speech discrimination with an increase in the disabling when hearing loss exceeds 40dB in adults and 30dB in intelligibility threshold, which corresponds with the dB threshold children in the best ear. In their March 2019 report, the WHO required to recognize 50% of the words presented(Figure 1). estimated that more than 466 million people are affected by disabling hearing loss, which is 6.6% of the world population. The vast majority Interviewers can ask simple questions that rule out or point to (93%) is adults and the people most at risk are the elderly, since 1/3 presbycusis: of those over 65 years of age are reported to suffer from deafness. The - Do you have problems understanding in noisy number of people with disabling hearing loss is expected to rise in the environments such as restaurants, family meals, etc.? future to 630 million in 2030 and over 900 million in 2050 [1]. - Do you understand male voices better than female voices? In addition, the link between deafness and cognitive decline is now corroborated by robust data and is the subject of much research - Do people around you complain about your tendency to [2-4]. The economic impact of deafness is estimated to be $750 billion increase the volume of the TV or radio? per year [5,6]. - Have you become intolerant to certain loud sounds? Adult Hearing Loss Many questionnaires related to presbycusis are also available. Overview and epidemiology The most consensual is the Hearing Handicap Inventory for the Strictly speaking, presbycusis or Age-Related Hearing Loss Elderly (HHIE) and the simplified version which is more suitable (ARHL) is not a disease but rather a normal aging process involving for screening, the Hearing Handicap Inventory for the Elderly - all the neurosensory structures of the hearing system. Screening Version (HHIE-S) [8,9] (Table 1). The pathophysiology is complex because it involves several Finally, smartphone applications have been developed to screen o o structures and depends on several factors. Damage can be localized adult hearing loss. HearZa (De Sousa et al., 2018) or HearWHO at the cochlear, neural and central level. The intrinsic factors involved (De Wet et al., 2019) applications consist of repeating a series of are mitochondrial alterations, genetic and cellular disorders, 3-digit numbers presented on the headset or earphones in antiphasic micro-vascularization damage due to cardiovascular risk factors conditions. This application can be used to test bilateral hearing in (hypertension, diabetes, dyslipidemia), and other systemic diseases. noise in less than 3 minutes and achieves a sensitivity and specificity Extrinsic factors are mainly related to exposure to noise, ototoxic of more than 80% for the diagnosis of a hearing impairment and the drugs and diet. severity [10]. ARHL is characterized by a decrease in auditory perception and Current limitations that are being evaluated are related to digital speech comprehension, especially in noisy environments. Despite a access, particularly for older populations or those living in rural areas. normal hearing threshold, some subjects have difficulty understanding Risk factors for deafness speech. This is referred to as a Central Auditory Processing Disorder Risk factors for deafness should be systematically explored during (CAPD), which is a deficiency in central auditory pathways such as an interview: neural transmission, and an extraction deficit in auditory information processing. - Family history of early deafness The genetics of presbycusis is still poorly defined due to the - Acute or repeated noise trauma (working in noise without Gerontol Geriatr Res - Volume 6 Issue 1 - 2020 Citation: Molinier CE, Gallois Y, Marx M and Fraysse B. Overview of Hearing Loss in the Elderly. Gerontol Submit your Manuscript | www.austinpublishinggroup.com Geriatr Res. 2020; 6(1): 1040. Molinier et al. © All rights are reserved Molinier CE Austin Publishing Group Table 1: Hearing Handicap Inventory for Elderly - Screening Version (HHIE-s). YES SOMETIMES NO 1) Does a hearing problem cause you to feel embarrassed when you meet new people? 2) Does a hearing problem cause you to feel frustrated when talking to members of your family? 3) Do you have difficulty hearing when someone speaks in a whisper? 4) Do you feel handicapped by a hearing problem? 5) Does a hearing problem cause you difficulty when visiting friends, relatives, or neighbors? 6) Does a hearing problem cause you to attend religious services less often than you would like? 7) Does a hearing problem cause you to have arguments with family members? 8) Does a hearing problem cause you difficulty when listening to TV or radio? 9) Do you feel that any difficulty with your hearing limits or hampers your personal or social life? 10) Does a hearing problem cause you difficulty when in a restaurant with relatives or friends? … x 4 … x 2 … x 0 Raw score = Results: 0 to 8 = 13% probability of hearing impairment (no handicap) 10 to 24 = 50% probability of hearing impairment (mild/moderate handicap) 26 to 40 = 84% probability of hearing impairment (severe handicap). protection) recently been identified between hearing loss and cognitive decline. A study published in Le Lancet in 2017 (3) identifies modifiable and - Otological pathologies: chronic otitis, otospongiosis, non-modifiable risk factors for developing dementia. Hearing loss sudden deafness and Meniere’s disease appears to be the most significant modifiable risk factor due to the - Ototoxic drugs (aminoglycosides, chemotherapies, high- high prevalence and strong association with cognitive decline. The dose aspirin) mechanisms are still unknown and although angiopathies could be a confounding factor since the micro-vascularization of the inner ear - Severe infections (meningitis, severe sepsis) and central nervous system are very similar, it now seems obvious - Autoimmune or systemic diseases that hearing loss accelerates cognitive decline. - Cardiovascular predisposition (diabetes, high blood Finally, pure central hearing loss is thought to be a prodrome pressure, dyslipidemia, obesity, etc.). of Alzheimer’s disease. The relative risk of developing Alzheimer’s The impact of hearing loss disease in affected patients is estimated to be 4.2 [2]. Classically, 3 “social” stages are described in presbycusis: This is a rare type of hearing loss. However, it is suspected in discordances revealed by audiometry, with preservation of tonal - The “subclinical” stage during which only high frequencies thresholds while spoken word recognition, i.e. speech comprehension are affected has little clinical impact. At this stage the diagnosis is plummets. A battery of specific behavioral and electrophysiological based on the audiometry. tests (GAP test, Tone Decay test, Auditory-Evoked Potential, etc.) - The “social impact” stage where conversational level carried out by a specialist confirms central hearing loss. frequencies begin to be affected. The first symptoms are often In a 25-year longitudinal study, Amieva et al. found a decrease in difficulty understanding speech in noise. The patient then gradually the MMSE score, an increase in cognitive decline and an increase in adapts their lifestyle by limiting certain social situations. the risk of depression in elderly patients who reported hearing loss - The “advanced” stage where hearing loss is evident even in [11]. silence. The subject then begins to reduce their social interactions and Under all circumstances, early use of a hearing aid in patients with gradually withdraws. presbycusis remains an important means of preventing dementia in The impact of deafness on young and active populations is also the elderly. significant. The economic impact of presbycusis Among children, there is a strong association between hearing Reed et al. estimated the overall additional cost of care in 10 loss and academic difficulties. Similarly, among adults, poorly cared years for a subject with untreated hearing
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