Key points of hyperbaric oxygen therapy for idiopathic sensorineural deafness: 1. Younger patients respond better to hyperbaric oxygen therapy than older patients (between the ages of 50 and 60 years). 2. The efficacy of early treatment is better than late treatment, with early defined as 2 weeks to 3 months. Yan Lu, Department of Hyperbaric Oxygenation, Naval General Hospital 3. Patients with moderate to severe hearing loss have better results than those with mild hearing loss (moderate hearing loss is generally defined as 60 decibels). 4. The results of studies on the efficacy of hyperbaric oxygen therapy depend on the method chosen to assess the efficacy.