March 3rd is World Hearing Day. This global initiative aims to raise public awareness of hearing health and reduce the impact of hearing loss on individuals, families, and society.
As a vital sensory organ, the ears, when affected by hearing impairment, not only damage auditory and speech functions but also severely impact physical and mental health, social interactions, and quality of life, imposing a heavy burden on families and the economy.
Hearing loss is not an insurmountable challenge; with appropriate treatment, favorable outcomes can often be achieved. There are various types of hearing loss, including congenital, drug-induced, and sudden sensorineural hearing loss (SSNHL). While some forms are preventable-such as avoiding or using ototoxic drugs with caution to prevent drug-induced hearing loss-others are treatable. Notably, SSNHL is one of the key indications for hyperbaric oxygen therapy (HBOT).
Characteristics and Triggers of Sudden Sensorineural Hearing Loss (SSNHL)
SSNHL can occur at any age, with multiple underlying causes:
Vascular spasms triggered by factors like fatigue and noise exposure
Increased blood viscosity due to high blood lipids and glucose levels, leading to inner ear ischemia and hypoxia
Viral infections
Advanced age combined with underlying conditions such as hypertension and diabetes
Neurological dysfunction in young and middle-aged adults caused by mental stress, emotional agitation, and excessive fatigue
Severe cases of SSNHL are often accompanied by tinnitus, vertigo, nausea, vomiting, and a sensation of ear fullness.
Principles and Advantages of Hyperbaric Oxygen Therapy (HBOT)
HBOT helps correct hypoxic conditions in the inner ear, promoting the repair of inner ear cells, making it a crucial treatment for SSNHL.
Relationship Between Treatment Timing and Efficacy
Optimal Treatment Window: The earlier HBOT is initiated after the onset of SSNHL, the better the therapeutic outcomes.
Golden Hour: Treatment is most effective when started within 24–48 hours of symptom onset, as this maximizes the reparative potential of inner ear cells and significantly improves the likelihood of hearing recovery.
Subsequent Treatment Opportunities: Even if more than one month has passed since onset, patients should not abandon treatment; some may still experience partial hearing improvement with continued therapy.
Comprehensive Treatment Approach
To achieve optimal results, HBOT is often combined with other interventions:
Etiological Management: Control underlying conditions like hypertension and diabetes to eliminate triggering factors.
Pharmacological Support: Administer vasodilators alongside HBOT to improve inner ear microcirculation.
Daily Ear Care: Perform regular ear health exercises and massages to enhance local blood flow.
Lifestyle Adjustments: Maintain a light, balanced diet rich in B vitamins, avoid noise exposure, and prevent excessive fatigue.