H80.0 – Otosclerosis Involving the Oval Window
H80.0 is the ICD-10 code for otosclerosis involving the oval window, non-obliterative. It causes progressive hearing loss due to abnormal bone remodeling in the inner ear.
Things worth knowing about "H80.0"
H80.0 is the ICD-10 code for otosclerosis involving the oval window, non-obliterative. It causes progressive hearing loss due to abnormal bone remodeling in the inner ear.
What Does ICD-10 Code H80.0 Mean?
The ICD-10 code H80.0 stands for otosclerosis involving the oval window, non-obliterative. This code describes a specific form of otosclerosis in which abnormal bone remodeling occurs around the oval window of the inner ear without completely closing (obliterating) the opening. Otosclerosis is one of the most common causes of acquired hearing loss in adults.
What Is Otosclerosis?
Otosclerosis is a disease of the bony labyrinth of the inner ear in which normal bone tissue is replaced by spongy, abnormal bone. The area most commonly affected is around the oval window – the opening between the middle ear and the inner ear – and the footplate of the stapes (stirrup bone). The resulting stiffening of the stapes impairs normal sound conduction and leads to conductive hearing loss.
Causes
The exact cause of otosclerosis is not yet fully understood. The following factors are considered relevant:
- Genetic predisposition: Otosclerosis is often inherited in an autosomal dominant pattern and tends to run in families.
- Hormonal influences: The condition frequently manifests in women of childbearing age, and pregnancy may worsen symptoms.
- Viral factors: A possible role of the measles virus has been discussed in the literature.
- Immunological factors: Inflammatory processes within the bony tissue of the inner ear may contribute to disease development.
Symptoms
The typical symptoms of otosclerosis involving the oval window include:
- Progressive hearing loss, often initially in one ear and later affecting both ears
- Tinnitus (ringing or buzzing in the ears)
- Better hearing in noisy environments (known as paracusis Willisii)
- Dizziness or vertigo (less common)
Diagnosis
Diagnosis is based on a combination of the following assessments:
- Audiometry: Hearing test to determine the type and degree of hearing loss (conductive or mixed)
- Tympanometry: Measurement of eardrum and ossicular mobility
- Stapedius reflex testing: Assessment of the reflex arc in the middle ear
- Imaging: Computed tomography (CT) of the temporal bone to visualize bony changes
Treatment
Surgical Procedure: Stapedectomy / Stapedotomy
The most effective treatment for otosclerosis at the oval window is surgery. In a stapedotomy, a small hole is drilled into the fixed stapes footplate and a prosthesis is inserted to restore sound conduction. The success rate of this procedure is very high.
Hearing Aids
For patients who are not suitable candidates for surgery or prefer a non-surgical approach, hearing aids are an effective option for improving hearing function.
Medical Therapy
Sodium fluoride was historically used to slow abnormal bone remodeling. However, this approach remains controversial and is not approved in all countries.
References
- World Health Organization (WHO): International Classification of Diseases, 10th Revision (ICD-10). Code H80.0 – Otosclerosis involving oval window, non-obliterative.
- Stach BA. Clinical Audiology: An Introduction. 3rd ed. Plural Publishing; 2018.
- Rudic M, et al. The pathophysiology of otosclerosis: Review of current research. Hearing Research. 2015;330:51-56. doi:10.1016/j.heares.2015.07.014.
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