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H66.3 – Chronic Otitis Media Explained
H66.3 is the ICD-10 code for chronic otitis media, a persistent inflammation of the middle ear that can lead to hearing loss and other complications.
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H66.3 is the ICD-10 code for chronic otitis media, a persistent inflammation of the middle ear that can lead to hearing loss and other complications.
What is H66.3 – Chronic Otitis Media?
The ICD-10 code H66.3 refers to chronic otitis media, a long-lasting or recurrent inflammation of the middle ear. Unlike acute otitis media, the chronic form persists for several weeks or months and can cause permanent damage to the eardrum or the small bones of the middle ear (ossicles).
Causes
Chronic otitis media often develops from an incompletely resolved acute middle ear infection. Other contributing causes and risk factors include:
- Recurrent bacterial or viral upper respiratory tract infections
- Dysfunction of the Eustachian tube (the canal connecting the middle ear to the back of the throat), which impairs pressure regulation
- Allergies or chronic sinusitis
- Tympanic membrane perforation (a hole in the eardrum)
- Immune deficiency or underlying systemic diseases
- Exposure to passive smoking, particularly in children
Symptoms
Symptoms of chronic otitis media can vary in severity and may include:
- Ear pain or a feeling of pressure in the ear (often less intense than in the acute form)
- Hearing loss or reduced hearing in the affected ear
- Ear discharge (otorrhea) – purulent or mucous secretion from the ear
- Tinnitus (ringing or buzzing in the ear)
- Occasional dizziness or balance disturbances
- Recurrent infections without complete resolution
Diagnosis
Diagnosis is made by an ENT (ear, nose, and throat) specialist using the following methods:
- Otoscopy: Direct visual examination of the eardrum and ear canal
- Audiometry: Assessment of hearing ability
- Tympanometry: Evaluation of eardrum and middle ear mobility
- Ear swab and microbiological culture in cases of discharge
- Imaging studies (CT or MRI) if complications such as cholesteatoma are suspected
Treatment
Treatment depends on the underlying cause and the extent of the condition:
Conservative Treatment
- Local or systemic antibiotics for bacterial infections
- Ear drops containing antibiotic or anti-inflammatory agents
- Suction clearance of secretions from the middle ear
- Management of underlying conditions (e.g., allergies, enlarged adenoids)
Surgical Treatment
- Paracentesis (myringotomy): A small incision in the eardrum to allow drainage
- Insertion of tympanostomy tubes (grommets) to ventilate the middle ear
- Tympanoplasty: Surgical reconstruction of the eardrum and ossicles
- Surgical removal of a cholesteatoma if present
Complications
If left untreated or poorly managed, chronic otitis media can lead to serious complications:
- Permanent hearing loss
- Development of a cholesteatoma (an abnormal skin growth in the middle ear)
- Mastoiditis (infection of the mastoid bone behind the ear)
- In rare cases: meningitis or brain abscess
References
- World Health Organization (WHO): ICD-10 International Classification of Diseases, 10th Revision. Geneva, 2019.
- Casselbrant ML, Mandel EM: Epidemiology of otitis media. In: Rosenfeld RM, Bluestone CD (eds.): Evidence-Based Otitis Media. 2nd ed. Hamilton: BC Decker, 2003.
- Schilder AGM et al.: Otitis media. Nature Reviews Disease Primers, 2016; 2: 16063. doi:10.1038/nrdp.2016.63.
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