NUR1060 CH. 17 QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS LATEST UPDATE 2024/2025
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Course
NURS 1060
Institution
NURS 1060
NUR1060 CH. 17 QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS LATEST UPDATE 2024/2025
The external ear is composed of the
auricle, or pinna, and the external auditory canal
Umbo—
the base of the malleus, also serving as a center point landmark
Cone of light—
the reflection of the otoscope...
auricle, or pinna, and the external auditory canal
Umbo—
the base of the malleus, also serving as a center point landmark
Cone of light—
the reflection of the otoscope light seen as a cone due to the concave nature of the
membrane
• Pars flaccida—
the top portion of the membrane that appears to be less taut than the bottom portion
• Pars tensa—
the bottom of the membrane that appears to be taut
The middle ear, or tympanic cavity, is a
small, air-filled chamber in the temporal bone. It is separated from the external ear by
the eardrum and from the inner ear by a bony partition contain-ing two openings, the
round and oval windows.
The middle ear contains three auditory ossicles:
the malleus, the incus, and the stapes (Fig. 17-1). These tiny bones are responsible for
transmit-ting sound waves from the eardrum to the inner ear through the oval window.
, The inner ear, or labyrinth, is
fluid filled and made up of the bony labyrinth and an inner membranous labyrinth. The
bony labyrinth has three parts: the cochlea, the vestibule, and the semi-circular canals
(F
The transmission of sound waves through the external and middle ear is referred
to as
"conductive hearing,"
he transmission of sound waves in the inner ear is referred to as
"perceptive" or "sensorineural hearing."
a conductive hearing loss would be related to a
dysfunction of the exter-nal or middle ear (e.g., impacted ear wax, otitis media, foreign
object, perforated eardrum, drainage in the middle ear, or oto-sclerosis).
A sensorineural loss would be related to
dysfunction of the inner ear (i.e., organ of Corti, cranial nerve VIII, or temporal lobe of
brain).
Describe any recent changes in your hearing
.A sudden decrease in ability to hear in one ear may be associated with otitis media.
Sudden sensorineural hearing loss (SSHL) or sudden deafness (up to a 3-day period)
may be a medical emergency and thus should be referred for immediate follow-up.
Causes vary from unknown etiology to infections, trauma, toxicity, and other neurologic
or circulatory disorders (National Institute on Deafness and Other Communication
Disorders [NIDCD], 2010a; 2011b). OLDER ADULT CONSIDERATIONSPresbycusis, a
gradual hearing loss, is common after the age of 50 y.o
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