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1904年Parry首先采用颅中凹开颅术作为直接的通路,暴露内耳道、切断前庭神经和蜗神经以治疗顽固性耳鸣和眩晕。1917年Holmgren为治疗耳硬化症曾尝试经颅中凹径路作上半规管开窗术。1930年Putnam采用颅中凹开颅术暴露
Parry first in 1904, the use of cranio-concave craniotomy as a direct access to the internal auditory meatus, cut off the vestibular nerve and cochlear nerve to treat intractable tinnitus and dizziness. Holmgren in 1917 for the treatment of otosclerosis have tried to try the transcranial concave approach for semicircular canal fenestration. 1930 Putnam craniotomy concave craniotomy exposure