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H80.1 – Otosclerosis Oval Window | ICD-10
H80.1 is the ICD-10 code for otosclerosis involving the oval window, not obliterative. It is an inner ear condition causing progressive conductive hearing loss.
Things worth knowing about "H80.1"
H80.1 is the ICD-10 code for otosclerosis involving the oval window, not obliterative. It is an inner ear condition causing progressive conductive hearing loss.
What Does ICD-10 Code H80.1 Mean?
The ICD-10 code H80.1 refers to otosclerosis involving the oval window, not obliterative. This is a specific form of otosclerosis, a condition characterized by abnormal bone remodeling in the middle and inner ear. In H80.1, the oval window – a membrane-covered opening between the middle ear and the inner ear – is affected but not yet completely closed (non-obliterative).
Causes
The exact cause of otosclerosis has not been fully established. Contributing factors include:
- Genetic predisposition: The condition often runs in families and follows an autosomal dominant inheritance pattern.
- Hormonal influences: Worsening of symptoms during pregnancy has been observed.
- Viral infections: The role of measles virus in triggering the disease has been discussed in the literature.
- Sex and age: Women are more frequently affected than men; onset typically occurs between the ages of 20 and 40.
Symptoms
The hallmark symptom is slowly progressive conductive hearing loss. Additional symptoms may include:
- Difficulty understanding speech, particularly in noisy environments
- Tinnitus (ringing in the ears)
- Dizziness in rare cases
- Paradoxically better hearing in noisy environments, known as paracusis Willisii
Diagnosis
Diagnosis is established through a combination of assessments:
- Audiometry: Hearing evaluation typically reveals a conductive hearing loss with a characteristic Carhart notch (a dip in the bone conduction audiogram at 2000 Hz).
- Tympanometry: Assesses mobility of the eardrum and ossicles; shows reduced or absent stapedial reflexes.
- ENT examination: The eardrum typically appears normal on inspection.
- Imaging: High-resolution CT of the temporal bone can visualize the bony changes associated with otosclerosis.
Treatment
Treatment depends on the severity of the condition and the individual situation of the patient:
Surgical Treatment
The most effective treatment is stapedectomy or stapedotomy, in which the fixed stapes bone is partially or completely replaced by a prosthesis to restore sound conduction. These procedures have a high success rate when correctly indicated.
Conservative Treatment
For patients who decline surgery or are not suitable candidates, a hearing aid is a viable alternative. Sodium fluoride has historically been used to slow bone resorption, though it is less commonly recommended today.
Cochlear Implant
In advanced cases with combined conductive and sensorineural hearing loss, a cochlear implant may be considered.
References
- World Health Organization (WHO): International Classification of Diseases, 10th Revision (ICD-10) – H80.1 Otosclerosis involving oval window, not obliterative.
- Chole R.A., McKenna M.: Pathophysiology of Otosclerosis. Otology & Neurotology, 2001; 22(2): 249-257. PubMed PMID: 11300254.
- Merchant S.N., Nadol J.B. (Eds.): Schuknecht's Pathology of the Ear. 3rd Edition, People's Medical Publishing House, Shelton, CT, 2010.
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