Exam 4 (Ch.15&16) Flashcards
Used to lubricate and protect the ear
Cerumen
Function of Cerumen
helps keep foreign bodies from entering and reaching the TM
Gray and flaky, frequently forms a thin mass in the ear canal; more frequently in Asians and American Indians
Dry cerumen
Honey brown to dark brown and moist; more often in Caucasians and African Americans
Wet cerumen
What is the structure that connects the middle ear with the nasopharynx and allows for passage of air?
Eustachian Tube
When does the Eustachian tube usually open?
with swallowing or yawning
This part of the ear is responsible for protecting the inner ear by reducing the amplitude of loud sounds among other things.
The middle ear
Functions of middle ear
Conducts sound vibrations from the outer ear to central ear, protects inner ear by reducing the amplitude of loud sounds, and Eustachian tube allows equalization of pressure for TM
External portion of the ear is called:
Auricle or Pinna
A patients equilibrium is affected. Which part of the ear is responsible for this deficit?
Labyrinth (holds sensory organs for equilibrium and hearing
What is contained within the labyrinth?
Vestibule and the semicircular canals compose the vestibular apparatus, and the cochlea contains the central hearing apparatus.
If a patient has sensorineural or perceptive loss, what cranial nerve could be affected?
Cranial Nerve 8 (conducts impulses to brainstem)
Name the two types of tuning fork tests
Weber and Rinne tests (inaccurate and do not yield precise reliable data)
When performing the otoscopic exam on an adult, what do you do with the pinna?
Pull pinna up and back
When performing the otoscopic exam on a child, what do you do with the pinna?
Pull down
In aging adult, the eardrum may appear thicker or thinner?
Thicker (think harder to hear)
When performing the whisper test, how far away should the patient be from the examiner?
2 feet (arms length). Test one ear at a time while masking hearing in the other to prevent sound transmission around the head.
A person is experiencing ringing, crackling, and buzzing in their ears. What is wrong with them?
Tinnitus (phantom sound)(occurs when cerumen impaction, middle ear infection, or other ear disorders)
What is otitis media
Middle ear infection
How does OM occur?
obstruction of the Eustachian tube or passage of nasopharyngeal secretions in the middle ear.
What group of people are more likely to have OM?
children under the age of 2.
Normal findings when assessing the tympanic membrane.
Color: Pearly-gray
Prominent cone of light (5’o’clock in the right ear, 7’o’clock in the left ear)
Position should be flat and slightly pulled in at the center
Membrane should be intact
What are some predisposing factors for otitis media in children?
Absence of breastfeeding for the first 3 months Bottlefeeding in the supine position Exposure to tobacco smoke Daycare Male gender Pacifier use
Hearing loss that occurs with aging. Gradual onset over years, mostly high frequency loss, worse in noisy environments.
presbycusis
Another term of Otitis Externa is….
Swimmer’s Ear. (infection of the outer ear)
S/S Of Swimmer’s Ear
severe painful movement of the pinna and tragus, redness and swelling of the pinna and canal, scanty purulent d/c, scaling, itching, fever and enlarged tender regional lymph nodes. More common in hot, humid weather.
You can test the function of the inner ear by:
using the romberg test.
It assesses the ability of the vestibular apparatus in the inner ear to help maintain standing balance. also assesses the intactness of cerebellum and proprioception
These filter out the coarsest matter from inhaled air.
Nasal hair.
These filter out dust and bacteria
Mucosa blanket
What are the three levels of the auditory system?
Peripheral: transmits sound and converts into electrical impulses
Brainstem: permits locating the direction of sound in space and identifying the sound
Cerebral cortex: Interprets the meaning of the sound
Mechanical dysfunction of the external or middle ear.
(This is generally a partial loss of hearing). May be caused by impacted cerumen, foreign bodies, a perforated TM, pus or serum in middle ear and otosclerosis.
Conductive Hearing loss
Pathology of the inner ear, cranial nerve 8, or the auditory areas of the cerebral cortex. May be caused by presbycusis.
Sensorineural (perceptive) loss
the later wall of each nasal cavity contains three parallel bony projections. What are they called?
Superior, middle, and inferior TURBINATES
Numerous fibers along the basilar membrane are the receptor hair cells of the……
organ of Corti (sensory organ of hearing)