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22 Cards in this Set
- Front
- Back
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What is the most common sign of severe hearing loss in a child?
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Language development delay
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What are the 2 most common early sounds a baby makes, by what age?
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Dada/baba - 9 months
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What are the 3 types of hearing loss?
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-Conductive
-Retrocochlear/central -Sensorineural/cochlear |
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What causes conductive hearing loss?
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Outer ear diseases - otitis externa or EAC atresia
Middle ear diseases - otitis media or cholesteatoma |
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What causes sensorineural hearing loss?
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Damage to the cochlea - infectious, ototoxic drugs, loud noise, genetic
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What causes retrocochlear hearing loss?
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Disease in the auditory nerve or central auditory centers in the brain
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What are the levels of hearing loss severity?
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Normal 0-5 dB
Mild 25-30 dB Mod 30-50 dB Profound >70 dB |
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At what level does most speech sound become undiscernable?
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Moderate
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How much of SNHL is congenital?
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50%
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What are the 2 most common congenital autosomal dominant disorders with SNHL?
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-Waardenburg syndromes I/II
-Braniootorenal syndrome |
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What are the classic findings in Waardenburg syndromes?
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-Partial albinism - white forelock
-Deafness -Laterally displaced inner canthi -Broad nasal bridge/jaw |
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What are the findings in BOR syndrome?
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-Branchial cysts
-Deafness -Preauricular pits |
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What should you suspect in a patient with nephritis, progressive renal failure, and hearing loss?
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Alports syndrome
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4 other genetic conditions with often SNHL:
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-Neurofibromatosis
-Downs syndrome -Jervell - lange nielson (prolonged QT) -Hunter-hurler |
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What is the most common INFECTIOUS cause of congenital SNHL?
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Prenatal CMV infection
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Does the hearing loss present at birth in CMV babies?
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No it can progress later
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What 2 postnatal infections may cause sensorineural hearing loss?
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-GBS sepsis
-Strep pneumonia meningitis |
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At what hearing threshold will otoacoustic emissions be absent in a baby with SNHL?
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Above threshold 30-40 dB
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What Apgar scores make audiometry a necessity in neonates?
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4/less at 1 min
6/less at 5 min |
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What other things make audiometry a requirement?
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-Birthweight <1500 g
-Hyperbilirubin requiring exchange transfusion -Intubation >5 days |
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What is the language capacity at
-12 mo -24 mo -36 mo |
1yr - 2-4 words, mama/dada directive
2 yr - 50 words, 2-word combos 3 yr - 250 words, 3-word sentences, use pronouns |
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What 2 drugs are associated with causing sensorineural hearing loss?
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-Aminoglycosides
-Loop diuretics |
