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17 Cards in this Set
- Front
- Back
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Inner ear
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hearing organ – cochlea
balance organs - semicircular canals, utricle, and saccule |
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middle ear
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lining as in the nose, affected by chronic disease
--Tympanic membrane (eardrum) transmits the sound (20 -20,000 Hz audible for most people) --three ossicles transfer the vibrations |
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external ear
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auricle / pinna / outer ear
ear canal - external auditory passage |
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ear canal
length |
about 1 inch
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ear canal
skin lining |
-thicker and covering cartillage outside
-thin, tightly stretched, and covering bone inside |
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ear canal
where does it point in adults/children |
adults- downward
children- upward |
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how much fluid can an adult ear canal hold?
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hold about 0.85 mL (17 drops)
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Glands secrete substances that form cerumen (earwax), which
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lubricates the lining of the ear canal
protects ear canal aids the cleaning of debris |
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Ear-related OTC medications
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--treatment of excessive earwax
--treatment of water-clogged ears - 95% isopropyl alcohol and 5% anhydrous glycerin as “ear-drying aids” (Swim-Ear, Auro-Dri) |
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prescription treatments
combat ear infection |
ocuflox
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prescription treatments
anti-inflammatory |
Hydrocortisone 1% and Acetic Acid 2% Otic Solution
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prescription treatments
earache |
Antipyrine/Benzocaine Otic
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Earwax-softening Agents I
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--To treat excessive/impacted earwax
--Hydrogen peroxide, mineral oil, or vegetable oil --Carbamide peroxide (adduct of urea and hydrogen peroxide) irritating at higher concentrations also used in tooth bleaching |
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Earwax-softening Agents II
6.5 % Carbamide peroxide |
only slightly soluble and unstable in water
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Earwax-softening Agents II
Debrox |
6.5 % Carbamide peroxide
Sodium lauroyl sarcosinate Glycerin Propylene glycol |
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Earwax-softening Agents II
Murine Ear drops |
6.5 % Carbamide peroxide
Polysorbate 20 Glycerin Ethanol |
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Administration of Ear drops
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The drops are instilled and left in the ear.
Warm the drops in hands Avoid touching the ear dropper to the ear Tilt the head with the ear upward Hold the earlobe to straighten the canal upward and backward for adults (age > 3) downward and backward for children (age < 3) |
