Biomaterial Database

Equilibrial disturbances caused by hearing aids in hard of hearing children. 1977

T Rahko, and E Aantaa

To 22 hard-of-hearing school pupils a 2 sec. tone pip of 1500 Hz was presented at 120 to 130 dB SPL's (equals 113-123 dB ISO) to both (=44) ears. In 32 of the ears (?) the sound stimulus elicited an ENG change and thus a possible disturbance of equilibrium, 2 cases of type A, 3-10 sec. nystagmus; I case of type B, with continuing nystagmus; 3 cases of type C, with strengthening nystagmus; and I case of type D, with direction-changing nystagmus, were found. We conclude that, in perceptive hearing defects, the maximum output of hearing aids should be limited to 120 dB, not only because of the effect on hearing thresholds. but also on the equilibrial sense. Again we recommend that hearing aids should not be used in those surroundings where loss of equilibrium is dangerous.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D009759	Nystagmus, Pathologic	Involuntary movements of the eye that are divided into two types, jerk and pendular. Jerk nystagmus has a slow phase in one direction followed by a corrective fast phase in the opposite direction, and is usually caused by central or peripheral vestibular dysfunction. Pendular nystagmus features oscillations that are of equal velocity in both directions and this condition is often associated with visual loss early in life. (Adams et al., Principles of Neurology, 6th ed, p272)	Convergence Nystagmus,Horizontal Nystagmus,Jerk Nystagmus,Pendular Nystagmus,Periodic Alternating Nystagmus,Rotary Nystagmus,See-Saw Nystagmus,Vertical Nystagmus,Conjugate Nystagmus,Dissociated Nystagmus,Fatigable Positional Nystagmus,Multidirectional Nystagmus,Non-Fatigable Positional Nystagmus,Permanent Nystagmus,Rebound Nystagmus,Retraction Nystagmus,Rotational Nystagmus,Spontaneous Ocular Nystagmus,Symptomatic Nystagmus,Temporary Nystagmus,Unidirectional Nystagmus,Non Fatigable Positional Nystagmus,Nystagmus, Conjugate,Nystagmus, Convergence,Nystagmus, Dissociated,Nystagmus, Fatigable Positional,Nystagmus, Horizontal,Nystagmus, Jerk,Nystagmus, Multidirectional,Nystagmus, Non-Fatigable Positional,Nystagmus, Pendular,Nystagmus, Periodic Alternating,Nystagmus, Permanent,Nystagmus, Rebound,Nystagmus, Retraction,Nystagmus, Rotary,Nystagmus, Rotational,Nystagmus, See-Saw,Nystagmus, Spontaneous Ocular,Nystagmus, Symptomatic,Nystagmus, Temporary,Nystagmus, Unidirectional,Nystagmus, Vertical,Ocular Nystagmus, Spontaneous,Pathologic Nystagmus,Positional Nystagmus, Non-Fatigable,See Saw Nystagmus
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D004584	Electronystagmography	Recording of nystagmus based on changes in the electrical field surrounding the eye produced by the difference in potential between the cornea and the retina.	Electronystagmographies
D004856	Postural Balance	A POSTURE in which an ideal body mass distribution is achieved. Postural balance provides the body carriage stability and conditions for normal functions in stationary position or in movement, such as sitting, standing, or walking.	Postural Control,Posture Balance,Posture Control,Posture Equilibrium,Balance, Postural,Musculoskeletal Equilibrium,Postural Equilibrium,Balance, Posture,Control, Postural,Control, Posture,Equilibrium, Musculoskeletal,Equilibrium, Postural,Equilibrium, Posture,Postural Controls,Posture Balances,Posture Controls,Posture Equilibriums
D005260	Female		Females
D006310	Hearing Aids	Wearable sound-amplifying devices that are intended to compensate for impaired hearing. These generic devices include air-conduction hearing aids and bone-conduction hearing aids. (UMDNS, 1999)	Ear Molds, Hearing Aid,Aid, Hearing,Aids, Hearing,Hearing Aid
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000293	Adolescent	A person 13 to 18 years of age.	Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D014717	Vertigo	An illusion of movement, either of the external world revolving around the individual or of the individual revolving in space. Vertigo may be associated with disorders of the inner ear (EAR, INNER); VESTIBULAR NERVE; BRAINSTEM; or CEREBRAL CORTEX. Lesions in the TEMPORAL LOBE and PARIETAL LOBE may be associated with FOCAL SEIZURES that may feature vertigo as an ictal manifestation. (From Adams et al., Principles of Neurology, 6th ed, pp300-1)	CNS Origin Vertigo,Central Nervous System Origin Vertigo,Positional Vertigo,Spinning Sensation,Vertigo, Brain Stem,Vertigo, Brainstem,Vertigo, Central Nervous System Origin,Vertigo, Central Origin,Vertigo, Constant,Vertigo, Essential,Vertigo, Intermittant,Vertigo, Paroxysmal,Vertigo, Peripheral,Vertigo, Subjective,Brain Stem Vertigo,Brain Stem Vertigos,Brainstem Vertigo,Brainstem Vertigos,CNS Origin Vertigos,Central Origin Vertigo,Central Origin Vertigos,Constant Vertigo,Constant Vertigos,Essential Vertigo,Essential Vertigos,Intermittant Vertigo,Intermittant Vertigos,Origin Vertigo, CNS,Origin Vertigo, Central,Origin Vertigos, CNS,Origin Vertigos, Central,Paroxysmal Vertigo,Paroxysmal Vertigos,Peripheral Vertigo,Peripheral Vertigos,Sensation, Spinning,Sensations, Spinning,Spinning Sensations,Subjective Vertigo,Subjective Vertigos,Vertigo, CNS Origin,Vertigo, Positional,Vertigos,Vertigos, Brain Stem,Vertigos, Brainstem,Vertigos, CNS Origin,Vertigos, Central Origin,Vertigos, Constant,Vertigos, Essential,Vertigos, Intermittant,Vertigos, Paroxysmal,Vertigos, Peripheral,Vertigos, Subjective