What is otits media
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I now have enough information for a thorough answer. Here it is:
Otitis Media (Middle Ear Infection)
What Is It?
Otitis media (OM) is inflammation or infection of the middle ear - the air-filled space behind the eardrum (tympanic membrane). It is the second most common pediatric diagnosis in emergency departments, behind upper respiratory infections. By age 7, about 93% of children will have had at least one episode.
How It Develops
The middle ear is connected to the back of the throat by the Eustachian tube, which normally equalizes pressure and drains fluid. When the Eustachian tube becomes inflamed or blocked (most often after an upper respiratory infection or allergy), fluid builds up in the middle ear. This creates a warm, moist environment where bacteria and viruses can multiply.
The three most common bacteria involved are:
- Streptococcus pneumoniae (25-40% of cases)
- Haemophilus influenzae (10-30%)
- Moraxella catarrhalis (2-15%)
(Textbook of Family Medicine 9e)
Types of Otitis Media
| Type | Description |
|---|---|
| Acute Otitis Media (AOM) | Sudden onset infection with fluid in the middle ear and signs of inflammation (pain, fever, bulging eardrum) |
| Otitis Media with Effusion (OME) | Fluid in the middle ear without acute symptoms ("glue ear"); often follows AOM |
| Chronic Suppurative Otitis Media (CSOM) | Persistent infection with a perforated eardrum and ongoing discharge lasting >6 weeks |
Risk Factors
- Daycare attendance and winter season (increased exposure to respiratory infections)
- Parental smoking
- Bottle feeding in the supine position
- Male gender
- Genetic and ethnic factors (Inuit, Native American populations)
- Allergies
- Craniofacial abnormalities (e.g., cleft palate)
- Pacifier use
- Previous episodes of AOM
(Textbook of Family Medicine 9e)
Signs and Symptoms
- Ear pain (otalgia) - in infants, look for ear tugging or rubbing
- Fever
- Hearing loss
- Irritability and loss of appetite (in children)
- Otorrhea (ear discharge, if the eardrum perforates)
- Tinnitus or vertigo (less common)
On examination: a bulging, erythematous (red) tympanic membrane with loss of landmarks is the hallmark finding. A flat tympanogram confirms middle ear effusion.
Diagnosis
Diagnosis of AOM requires all three:
- Acute onset of symptoms
- Presence of middle ear effusion (seen as air-fluid levels, bulging eardrum, or flat tympanogram)
- Signs of middle ear inflammation (pain, redness, bulging)
Redness of the eardrum alone (without effusion) is called myringitis, which is a separate diagnosis. (Rosen's Emergency Medicine)
Treatment
Antibiotics
Amoxicillin is the first-line antibiotic for most patients.
| Patient Group | Regimen |
|---|---|
| Low-risk (>6 yr, no recent antibiotics, no daycare, temp <38°C) | Amoxicillin 40-50 mg/kg/day x 5 days |
| High-risk (<2 yr, daycare, recent antibiotics, fever >38°C) | Amoxicillin 80-90 mg/kg/day x 10 days |
| Treatment failure (symptoms persist >3 days) | Amoxicillin-clavulanate, cefuroxime, or ceftriaxone |
| Penicillin-allergic | Cefuroxime axetil or cefpodoxime |
(Textbook of Family Medicine 9e)
"Watch and Wait" (Observation)
Most cases of AOM resolve spontaneously. Observation for 2-3 days without immediate antibiotics is acceptable in:
- Children older than 2 years with mild, unilateral symptoms and no fever above 39°C
- Reliable parents/caregivers who can monitor and return if symptoms worsen
Observation is not validated in adults. (Rosen's Emergency Medicine)
Pain Management
Antibiotics do not relieve pain in the first 24 hours. Use acetaminophen or ibuprofen for pain control from the start.
Complications
- Mastoiditis - the most common suppurative (pus-forming) complication, though rare in the modern era
- Hearing loss (temporary or, in CSOM, permanent)
- Tympanic membrane perforation
- Meningitis or brain abscess (rare)
A good visual overview of the anatomy and pathophysiology is available here:
Bottom line: Otitis media is a very common middle ear infection, especially in young children. It's caused mostly by bacterial infection following Eustachian tube dysfunction. Treatment depends on age, severity, and risk factors - and for many children, watchful waiting is appropriate before prescribing antibiotics.
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