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Otitis media

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Otitis media is a term used to describe a group of inflammatory diseases affecting the middle ear.

Otitis Media
Otitis Media

These conditions involve swelling and fluid buildup behind the eardrum. Because the ear is vital for hearing and balance, these infections are a major global health concern. Understanding the different types of otitis media helps doctors decide how to treat patients effectively.

The mechanism of these ear issues usually begins with the Eustachian tube. This tube connects the middle ear to the nasopharynx, which is the part of the throat behind the nose. Normally, the tube helps equalize pressure and drains fluids. However, inflammation in the mucous membranes can cause the tube to malfunction. This often happens during a viral upper respiratory infection or due to allergies. When the tube fails, fluid can move into the sterile middle-ear space. If bacteria like Streptococcus pneumoniae or Haemophilus influenzae enter this fluid, an infection develops.

There are three primary types of otitis media. The first is acute otitis media (AOM), which is a rapid infection that causes significant pain. Children with AOM might pull at their ears, cry more, or experience fevers. The second type is otitis media with effusion (OME), often called "glue ear." This involves non-infectious fluid that stays in the middle ear for weeks or months. It may not cause pain, but it can lead to conductive hearing loss. The third type is chronic suppurative otitis media (CSOM). This is a long-term inflammation that results in a perforated tympanic membrane, or a hole in the eardrum, causing persistent discharge.

Subtotal Perforation of the right tympanic membrane
Subtotal Perforation of the right tympanic membrane

Doctors use specific methods to diagnose these conditions by looking at the tympanic membrane. A pneumatic otoscope is a common tool used for this purpose. It uses a puff of air to check if the eardrum moves correctly. A bulging or non-moving eardrum is a strong sign of AOM. If the eardrum is red, cloudy, or bulging, it confirms inflammation or effusion. In more complex cases, medical professionals may use advanced imaging like a CT scan or an MRI. These tools help identify complications such as meningitis or the destruction of bone.

Otitis Media
Otitis Media

The scale of these ear diseases is quite large. Globally, acute otitis media affects approximately 11% of the population every year. This accounts for about 710 million individual cases annually. Half of these cases occur in children under five years of age, and it is more common in males. OME is also widespread, affecting about 80% of children before they reach age ten. CSOM is a serious complication, affecting an estimated 65 to 330 million people worldwide. While deaths from otitis media fell from 4,900 in 1990 to 3,200 in 2015, the impact remains significant.

Otitis media world map-Deaths per million persons-WHO2012
Otitis media world map-Deaths per million persons-WHO2012

Risk factors can influence how often someone develops these infections. Exposure to tobacco smoke, the use of pacifiers, and attending daycare are all linked to higher risks. Certain medical conditions, such as Down syndrome or cleft lip and palate, also increase susceptibility. For infants, breastfeeding is noted as a protective factor against AOM. Vaccines, specifically the pneumococcal conjugate vaccine and the influenza vaccine, also play a role in prevention.

Otitis media world map - DALY - WHO2004
Otitis media world map - DALY - WHO2004

Managing these conditions involves both medication and, sometimes, surgery. For pain relief in AOM, doctors may suggest paracetamol, ibuprofen, or benzocaine ear drops. Antibiotics like amoxicillin are often used to speed recovery, especially for children under two years old. However, antibiotics can cause side effects like vomiting or skin rashes. For children with frequent recurrences, surgeons may perform a procedure to place tympanostomy tubes in the ear. These small tubes help the middle ear drain more effectively and reduce the frequency of infections.

Otitis Media
Otitis Media
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File:Otitis Media.png
Otitis Media.png
Subtotal Perforation of the right...
File:Otitis media world map - DALY - WHO2004.svg
Otitis media world map - DALY - WHO2004.svg
File:Otitis media world map-Deaths per million persons-WHO2012.svg
Otitis media world map-Deaths per million...
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