Management of Deafness in the Elderly

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1 Management of Deafness in the Elderly Mrs R Kayarkar Consultant ENT Surgeon Mid Yorks NHS Trust British Geriatric Society Meeting

2 Effects of hearing loss Embarrassment, loss of confidence, anger and resentment are among the most common feelings they have to deal with everyday. Noisy groups and strangers are avoided and there is a growing preference to remain at home rather than to go out, which in many cases leads to inactivity, depression and isolation. A persistent denial of the new situation springs from a view of it as illegitimate, something to be ashamed of and hidden; hence, in great part, a dislike for or rejection of hearing aids. Deafness in the elderly can bring about additional difficulties, such as the inability to insert the earmould. Age related hearing loss means both an adaptation to the hearing loss and to old age.

3 Anatomy

4 External Canal Acoustic Head shadow effect & reflections 2kHz 6dB gain Pinna flange resonance: at 3-5kHz 10dB gain. Concha resonance: at 5kHz. 3dB gain Total gain 15-20dB Absent or removal of pinna will cause localisation difficulty Ear canal resonance: at 4kHz dB gain 4mm. critical diameter - no loss. 3mm. diameter - 14dB loss. 2mm. diameter - 21dB loss. Total occlusion - 54dB maximum loss

5 Physiological acoustics TM & ME transformer mechanism (gains) Effective areal ratio: TM / Footplate: 55/3.2=17.1, 26.5dB gain. Lever effect: LP malleus / LP incus: 1.3:1, 7.3dB gain. Phase difference: 16.2dB gain. Total gain 50dB in normal hearing or max. loss in ME pathology. TM Perf: 15% 16dB, 40% 22dB. 65% 26.9dB, 85% 28.7dB. Central perf. causes more HL than peripheral. Small perf. affect low Hz., large affect all Hz.. Maximum loss from TM up to 30dB. Clinical implications are in ME reconstruction surgery

6 Cochlear Physiology Hydrodynamics of Perilymph fluid & BM motion

7 BM motion Helmholtz s & Bekesey s theories BM motion according to Von Helmholtz- Piano theory BM motion according to Von Bekesey Travelling wave theory

8

9 Types of deafness Conductive Sensory neural Mixed

10 Conductive deafness Impacted wax Infection- Chronic - Acute Ossicular fixation,discontinuity Tumours Nasopharyngeal Carcinoma -- Glomus Tympanicum

11 Wax

12 Cholesteatoma

13 Nasopharyngeal tumour Unilateral conductive loss Unilateral otitis media with effusion

14 Sensory neural Presbyacusis Infections Trauma Ototoxic drugs Tumours Endocrine Systemic diseases

15 Presbyacusis Most common cause Atrophy of stria vascularis Degeneration of hair cells Degeneration of nerve fibres Stiffening of basilar membrane

16 Infection & Inflammation Pain Discharge Labyrinthitis Meningitis Granulomatous diseases- TB, Syphilis, Wegners Immunological diseases-temporal arteritis - relapsing polychondritis

17 Trauma Noise Physical Iatrogenic

18 Ototoxic drugs Aminoglycosides Gentamycin - Streptomycin - Vancomicin Diuretics - Furosemide -Ethacrynic acid NSAIDS & Salicylates Aspirin B blockers H2 Antagonists cimetidine Proton pump inhibitors Omeprazole Quinine Anticonvulsants - Phenytoin

19 Tumours Acoustic neuroma Carcinoma

20 Endocrine Diabetes Hypothyroidism Hyperparathyroidism Liver disease

21 Systemic diseases Paget s disease Osteomalacia

22 Conductive -Wax - OME Sensory neural -Ototoxic drugs - Neurological - Endocrine - Vascular - Autoimmune Sudden hearing loss

23 Investigations Audiogram Tympanogram

24 CT Scan Chronic infections Tumours

25 MRI Sensory neural

26 Management Hearing aids Surgical intervention

27 Antony Walker Chief Audiologist and Clinical Site Lead - Audiology

28 Degrees of hearing loss (normal)

29 Degrees of hearing loss (mild)

30 Degrees of hearing loss (moderate)

31 Degrees of hearing loss (severe)

32 Degrees of hearing loss (profound)

33 Conductive hearing loss L ear, normal hearing R ear

34 Tympanometry Normal shape (peaked) tympanogram Abnormal trace (no peak) tympanogram

35 Types of hearing aids Behind the ear Hearing Aid with earmould.

36 Cont:- Behind the ear Hearing Aid with slim tube (mild to moderate losses only, good manual dexterity needed).

37 Cont:- CIC Hearing Aid In-the-ear Hearing Aid

38 Communicators

39 Problems With Hearing Aids Feedback Recruitment Difficulty in insertion of mould Otitis externa

40 Thank you

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