Idiopathic Sudden Sensorineural Hearing Loss
Sudden hearing loss without known cause is a medical emergency. HBOT combined with steroids offers the best chance for recovery.
What is Idiopathic Sudden Sensorineural Hearing Loss?
Idiopathic sudden sensorineural hearing loss (ISSNHL) is a rapid loss of hearing, usually in one ear, that develops within 72 hours with no identifiable cause. It affects the inner ear (cochlea) or auditory nerve.
ISSNHL affects about 5-20 per 100,000 people annually. Without treatment, only about one-third of patients recover significant hearing. Time to treatment is critical—delays beyond 2 weeks significantly reduce recovery chances.
The inner ear (cochlea) has extremely high metabolic oxygen requirements. The hair cells that convert sound to nerve signals are particularly vulnerable to oxygen deprivation.
Symptoms
If you or someone you know is experiencing these symptoms, seek medical attention. Early intervention is critical for many of these conditions.
- Sudden hearing loss (develops within hours)
- Usually affects one ear only
- May notice upon waking
- Often accompanied by tinnitus (ringing)
- May have sensation of fullness in ear
- Dizziness or vertigo in some cases
- No obvious cause (ear infection, trauma, etc.)
Urgent Otologic Treatment
Sudden hearing loss is a medical emergency requiring prompt evaluation and treatment within days of onset.
Systemic Steroids
High-dose oral corticosteroids (prednisone) are first-line treatment started immediately.
Intratympanic Steroids
Steroid injections directly into the middle ear for salvage therapy or steroid-intolerant patients.
Audiometry
Serial hearing tests to document baseline and monitor response to treatment.
MRI Evaluation
Brain MRI to rule out acoustic neuroma or other structural causes.
How Hyperbaric Oxygen Therapy Helps
HBOT delivers high levels of oxygen to the oxygen-dependent hair cells of the inner ear. The perilymph (fluid of the inner ear) has no direct blood supply and depends on oxygen diffusion.
HBOT, combined with corticosteroid therapy, significantly improves recovery rates compared to steroids alone—particularly when started within 2 weeks of onset.
Key Benefits of HBOT for Sudden Hearing Loss
Treatment Protocol
Treatment is most effective when started within 2 weeks of onset, ideally within days. Typical protocol is 2.0-2.4 ATA for 90 minutes daily.
A course of 10-20 treatments is typical, with hearing tests to monitor response. HBOT is used in addition to, not instead of, corticosteroid therapy.
Ready to Explore HBOT?
Schedule a consultation with our hyperbaric medicine specialists to discuss whether HBOT may be right for your condition.