While many people naturally associate a decline in auditory clarity with ageing, hearing problems can also stem from mechanical issues within the ear, affecting individuals even in their youth.
One such condition is otosclerosis, which can lead to a gradual and frustrating loss of hearing.
While navigating the uncertainty of such a diagnosis can be unsettling, it is a manageable journey. In this guide, we’ll help you understand the condition, as well as its symptoms and treatment options.
What is Otosclerosis?
Otosclerosis is a condition characterised by abnormal bone remodelling in the middle ear, primarily affecting the stapes bone.
It most commonly causes conductive hearing loss, where the resulting bone ‘stiffness’ prevents sound vibrations from being transmitted efficiently to the inner ear.
In some cases, the condition progresses to the cochlea (cochlear otosclerosis), which can damage the hearing nerve. This transition leads to sensorineural hearing loss, which can make sounds appear quieter and less clear.
What Symptoms Do People with Otosclerosis Have?
Because otosclerosis symptoms typically develop gradually over several years, the early signs may be easily overlooked. You might observe several changes:
- Gradual hearing loss: Auditory decline may affect one ear or both ears, commonly beginning with difficulty hearing whispers or low-pitched tones.
- Tinnitus: This involves persistent ringing in the ears, though some people might also notice buzzing or hissing sounds.
- Balance problems: You might experience a general sense of instability in your normal daily movements and activities.
- Vertigo: This symptom creates a disorienting sensation that you or your immediate surroundings are spinning.
- Dizziness: This lightheadedness is frequently associated with the structural bone changes in the inner ear.
- Speaking more softly than usual: Due to the occlusion effect, your own voice sounds abnormally loud to you, causing you to lower your speaking volume.
How is Otosclerosis Diagnosed?
ENT specialists and audiologists rely on various processes to diagnose otosclerosis:
- Medical histories: Clinicians review your family genetics and past viral infections, such as measles, to identify potential hereditary or environmental triggers.
- Physical exams: An otoscope is used to inspect the ear canal, helping to rule out obstructions like earwax or active infections.
- Tympanometry: This hearing test measures the flexibility of the eardrum and the functional movement of the tiny bones within the middle ear.
- Audiograms: These pure-tone tests identify the specific ‘air-bone gap’ that typically characterises mechanical sound conduction issues.
Why is There a Carhart Notch in Otosclerosis?
If you have otosclerosis, your audiogram will likely display the Carhart notch, which charts a dip in bone conduction sensitivity at the 2000 Hz frequency.
However, this does not represent permanent nerve damage. Instead, it is a mechanical phenomenon caused by the stapes becoming ‘fixed’, which alters the natural resonance and vibrational efficiency of the entire ear structure.
What is the Best Treatment for Otosclerosis?
Hearing Aid Solutions
Hearing aid solutions are a non-invasive and highly effective first-line treatment for managing otosclerosis.
By amplifying external sounds, the devices help bypass middle ear bone stiffness to improve hearing.
However, while they restore clarity, they do not stop the condition from getting worse.
Stapedectomy
A stapedectomy is a specialised surgical procedure where the fixed stapes bone is replaced with a micro-prosthesis.
This replacement hearing bone resides in the middle ear and bypasses the stapes, restoring sound conduction to the inner ear. Consequently, this intervention improves hearing sensitivity by allowing vibrations to travel freely once again.
Cochlear Implants
For advanced cochlear otosclerosis, where traditional aids no longer provide sufficient benefit, a cochlear implant becomes a viable solution.
These advanced devices bypass damaged inner ear structures entirely, creating a new pathway through which sound signals can travel directly to the brain for processing.
Restoring Your Connection to Sound
While otosclerosis is a progressive condition, it is also manageable when approached with the right expertise.
Therefore, if you suspect you are experiencing otosclerosis or any form of hearing loss, an early diagnosis is essential to prevent auditory decline from impacting your social life and mental well-being.
Book an appointment with The Listening Lab for a tailored assessment and personalised path forward today.
