Seven-line neck method combined with periauricular acupoint acupuncture as salvage treatment for sudden deafness: randomized controlled trial

INTERVENTION: treatment group:Acupuncture + electroacupuncture;Control group:placebo needle+ sham electroacupuncture; CONDITION: Sudden deafness PRIMARY OUTCOME: Impaired frequency pure tone mean threshold change from baseline; SECONDARY OUTCOME: Tinnitus Evaluation Questionnaire,TEQ;CQ‐11D;Proportion of patients with impaired frequency pure tone mean threshold improvement =10dB;Vertebrobasilar average Vean, RI, P;Subjects' self‐assessment of treatment effectiveness;Dizziness Handicap Inventory,DHI; INCLUSION CRITERIA: (1) Meet the diagnostic criteria of sudden deafness, and unilateral sudden deafness; (2) Age between 18 and 60 years old, regardless of gender; (3) Patients with sudden deafness who have not recovered after systematic treatment of Western medicine are defined as: after initial treatment, the hearing of damaged frequency has not returned to normal, or the affected ear has not reached the level of healthy ear, or has not reached the level before the disease. Initial treatment includes, but is not limited to, systemic or topical corticosteroids, and/or hemorheology therapy, hyperbaric oxygen therapy, neurotrophic drugs, antioxidants, etc; (4) The course of the disease is between 3 and 12 weeks; (5) Sign informed consent.