Diagnosis
The physician should be sure to ask the parent for a history of any recent cold, flu, or other respiratory infections. If the child complains of pain or has other symptoms of otitis media, such as redness and inflammation, the physician should be sure to rule out any other causes of such symptoms. They may include, but are not limited to the following:
- Otitis media with effusion. OME is commonly confused with acute otitis media. It must be ruled out because it does not respond to antibiotics.
- Dental problems (such as teething).
- Infection in the outer ear. Symptoms include pain, redness, itching, and discharge. Infection in the outer ear, however, can be confirmed by wiggling the ears, which will produce pain. (This movement will have no significant effect if the infection is in the middle ear.)
- Foreign objects in the ear. This can be dangerous and a physician should always check for this first when a small child indicates pain or problems in the ear.
- Viral infection can produce redness and inflammation. Such infections, however, are not treatable with antibiotics and resolve on their own.
- A parent's or child's attempts to remove earwax.
- Intense crying can cause redness and inflammation in the ear.
Physical Examination
Instruments Used for Examining the Ear. An ear examination should be part of any routine physical examination in children, particularly because the problem is so common and many children have no symptoms.
- The physician first removes any ear wax (called cerumen) in order to get a clear view of the middle ear.
- The physician employs a small flashlight-like instrument called an otoscope to view the ear directly. This is the most important diagnostic step. This instrument will reveal signs of acute otitis media, bulging eardrum, and blisters. The physician will also check color.
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| An otoscope is a tool which shines a beam of light to help visualize and examine the condition of the ear canal and eardrum. Examining the ear can reveal the cause of symptoms such as an earache, the ear feeling full, or hearing loss. |
- To determine ear infection the physician should always use a pneumatic otoscope. This device detects any reduction in eardrum motion. It has a rubber bulb attachment that the physician presses to push air into the ear. Pressing the bulb and observing the action of the air against the eardrum allows the physician to gauge the eardrum's mobility.
- Some physicians may use tympanometry to evaluate the ear. In this case a small probe is held to the entrance of the ear canal and forms an airtight seal. While the air pressure is varied, a sound with a fixed tone is directed at the eardrum and its energy is measured. This device can detect fluid in the middle air and also obstruction in the Eustachian tube.
- A procedure similar to tympanometry, called reflectometry, also measures reflected sound to detect fluid and obstruction but does not require an airtight seal at the canal.
Neither tympanometry nor reflectometry are substitutes for the pneumatic otoscope, which allows a direct view of the middle ear
Findings Indicating AOM or OME. The physician will then assess the results of this examination to determine a diagnosis.
A diagnosis of AOM requires the following three criteria:
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History of recent sudden symptoms. Symptoms may include fever, pulling on the ear, pain, irritability, or discharge (otorrhea) from the ear.
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Presence of fluid in the middle ear. This may be indicated by fullness or bulging of the eardrum or limited mobility. The physician will use pneumatic otoscopy but may also use tympanometry or acoustic reflectometry.
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Signs and symptoms of inflammation. These may include redness of the eardrum as well as assessment of the child's discomfort. Ear pain that is severe enough to interfere with sleep may indicate inflammation.
AOM (fluid and infection) is often difficult to differentiate from OME (fluid without infection). It is important for a physician to make this distinction as OME does not require antibiotic treatment. In patients with OME, an air bubble may be visible and the eardrum is often cloudy and very immobile. A scarred, thick, or opaque eardrum may make it difficult for the physician to distinguish between acute otitis media and OME.
Home Diagnosis
Parents can also use a sonar-like device, such as the EarCheck Monitor, to determine if there is fluid in their child's middle ear. EarCheck employs acoustic reflectometry technology which bounces sound waves off the eardrum to assess mobility. When fluid is present behind the middle ear ( a symptom of AOM and OME), the eardrum will not be as mobile. The device works like an ear thermometer and is painless. Results indicate the likelihood of the presence of fluid and may help patients decide whether they need to contact their child's physician.
Tympanocentesis
On rare occasions the physician may need to draw fluid from the ear using a needle for identifying specific bacteria, a procedure called tympanocentesis. This procedure can also relieve severe ear pain. This is most often performed by ear, nose, and throat (ENT) specialists, and usually only in severe or recurrent cases. In most cases, tympanocentesis is not necessary in order to obtain an accurate enough diagnosis for effective treatment.
Determining Hearing Problems
Hearing tests performed by an audiologist are usually recommended for children with persistent otitis media with effusion. A hearing loss below 20 decibels usually indicates problems.
Determining Impaired Hearing in Infants and Small Children. Unfortunately, it is very difficult to test children under two years old for hearing problems. One way to determine hearing problems in infants is to gauge the baby's language development:
- At four to six weeks most babies with normal hearing are making cooing sounds.
- By around five months the child should be laughing out loud and making one-syllable sounds with both a vowel and consonant.
- Between six and eight months, the infants should be able to make word-like sounds with more than one syllable.
- Usually starting around seven months the baby babbles (makes many word-like noises) and should be doing this by 10 months.
- Around 10 months, the baby is able to identify and use some term for the parent, dada, baba, or mama.
- The baby speaks his or her first word usually by the end of the first year.
If a child's progress is significantly delayed beyond these times, a parent should suspect possible hearing problems.
Determining Impaired Hearing in Older Children. Hearing loss in older children may be detected by the following behaviors:
- They may not respond to speech spoken beyond three feet away.
- They may have difficulty following directions.
- Their vocabulary may be limited.
- They may have social and behavioral problems.
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