13 terms

Otitis Media

Problems in the Eustachian Tube
-Upper respiratory infections
-Big adenoids
* Foods
* Environmental
* Smoke
* Other air quality issues
-Cleft palate
-Deviated septum
-Infants (angle of slope)
Flow Chart of Otitis Media
Acute otitis media
(w/o effusion)
-The first sign of otitis media
-Before effusion or discharge

Gross morphology
-Injection of the TM vessels
-No bulging

-Acute onset of ear pain
Acute suppurative OM
(acute ear infection)
-The inflammatory edema from allergy or infection further interferes with ET drainage

Commonly associated organisms:
-Strep pneumoniae
-Staph aureus
-Hemophilus influenza
-Moraxella catarrhalis (Branhamella)
-Pseudomonas aeruginosa
Acute suppurative OM
(acute ear infection)
Morphology of Tympanic membrane
-Loss/diffusion of light reflex
-Loss/diffusion of other landmarks

Others findings:
-Ear pain
Acute suppurative OM
(acute ear infection)
-Clinical Course
Should the TM rupture:
-Pain is immediately relieved
-Hearing is impaired
-A purulosanguinous d/c may shoot from the drum (may find on the pillow in the AM)

-Allopathic treatment is Antibiotics or
"tubes" (tympanostomy tube)

-Rupture of TM
-Spread of infection to the
-mastoid process
Healing of a TM Perforation
-Hyperemia of the margin of the perforation.
-Red-yellow-brown crust at the margin with a thin membrane covering the perforation
-Epithelial migration occurs from the center to the periphery
-The crust is released into the canal and eventually removed
-An epidermoid cyst
-lined with keratinizing squamous or columnar epithelium (mucus producing)
-filled with amorphous debris and sometimes cholesterol

* Perforation of TM
* Chronic retraction
* Chronic otitis media

These lesions by progressive enlargement may erode into:
-the ossicles
-the labyrinth
-the adjacent bone
-the surrounding soft tissue
* masses in the neck may be visible

This can grow into the ossicles or inner ear and cause deafness

-"Sometimes the cyst ruptures increasing the inflammatory reaction and inducing the formation of giant cells that enclose partially necrotic squames and other particulate debris"
Serous Otitis Media
-Serous fluid in the middle ear in the absence of infection

-As in ASOM (usually bacteria or allergy)

-Normal serous fluid is trapped by a dysfunctional eustachian tube
-If the fluid becomes thick it is called "glue ear" or chronic catarrhal otitis media

-Hearing loss
-Delayed/abnormal speech acquisition
Chronic Otitis Media
-A longstanding smoldering bacterial infection accompanied by a perisitant discharge through a perforation in the drum
Bullous Myringitis
Otosclerosis and Tympanosclerosis
-New bone/fibrous tissue forms in the ear affecting hearing

* Autosomal dominant
* Begins in early decades of life
* Abnormal bone deposition around the oval window
* May lead to marked hearing loss