Chapter 26: Ear, Nose, Pharynx, and Larynx
Conductive hearing loss
i. blockages or damaged anatomical structures in the outer ear, ear
canal or middle ear
ii. Earwax is also known as cerumen
iii. Otosclerosis: bone from the cochlea to grow onto the stapes bone in the
middle ear, making it more difficult to hear
iv. Cholesteatoma: happens when tissue grows in the ear that should not be
there
Sensorineural hearing loss
i. permanent.
External or outer ear, consisting of:
i. Pinna or auricle= outside part of the ear.
ii. Tympanic membrane (eardrum): divides the external ear from the middle ear.
Middle ear (tympanic cavity), consisting of:
i. Ossicles: Three small bones that are connected and transmit the sound
waves to the inner ear. The bones are called: Malleus, Incus, Stapes
Inner ear, consisting of:
Cochlea.
i. This contains the nerves for hearing.
The order of the ossicles from the ear canal: Malleus, Incus, Stapes
Sponges and Dressings
i. Glasscock dressing – used after minor procedures of the ear like a
tympanoplasty
MYRINGOTOMY
This study source was downloaded by 100000882847079 from CourseHero.com on 04-05-2024 10:33:39 GMT -05:00
https://www.coursehero.com/file/218234157/Chapter-26-ENT-copy-copydocx/
Conductive hearing loss
i. blockages or damaged anatomical structures in the outer ear, ear
canal or middle ear
ii. Earwax is also known as cerumen
iii. Otosclerosis: bone from the cochlea to grow onto the stapes bone in the
middle ear, making it more difficult to hear
iv. Cholesteatoma: happens when tissue grows in the ear that should not be
there
Sensorineural hearing loss
i. permanent.
External or outer ear, consisting of:
i. Pinna or auricle= outside part of the ear.
ii. Tympanic membrane (eardrum): divides the external ear from the middle ear.
Middle ear (tympanic cavity), consisting of:
i. Ossicles: Three small bones that are connected and transmit the sound
waves to the inner ear. The bones are called: Malleus, Incus, Stapes
Inner ear, consisting of:
Cochlea.
i. This contains the nerves for hearing.
The order of the ossicles from the ear canal: Malleus, Incus, Stapes
Sponges and Dressings
i. Glasscock dressing – used after minor procedures of the ear like a
tympanoplasty
MYRINGOTOMY
This study source was downloaded by 100000882847079 from CourseHero.com on 04-05-2024 10:33:39 GMT -05:00
https://www.coursehero.com/file/218234157/Chapter-26-ENT-copy-copydocx/
