気脳写により高度難聴を来したと思われる稀有な1例

　気脳写はDandyにより施行されて以来脳外科領域特に最近は頭部外傷患者の診断治療上広く用いられている。頭部外傷に対してはSchaw，Fischer，Nohtfield，斎藤，荒木，高村，高山等の研究があり，又治療面でもLeriche. 斎藤，鈴木は癲癇に高山，中村は頭部外傷早期に於ける本法の治効を報じている。我々は頭部外傷後約100日目に施行せる気脳写後一側正常聴力が殆んど聾となりし例を経験したのでこゝに報告する。

　Kawamura and Hatori repport a case that resulted in a marked bilateral loss of hearing and onset of tinnitus aurium following institution of diagnostic procedure of pnemo-encephalography. A man, aged 24, a recipient of traumatic-head injury showed residual cerebral symptoms that abatement for 100 days since that injury and the surgical procedure mentioned was decided to be adopted at this time.

　The hearing in the left ear before the operation appeared to be in a condition near normal but, in the 4th month of postoperative period it began to show at first a rapid decline which gradually taperd off to some extent only to reach at the end the stage of a complete loss.

　The authors believe that the underlying cause in the onset of these complications might be relegated to formation of air embolism provoking circulatory disturbances in the vascular supply of the inner ear : intracerebral changes spurred by the trauma to be the cause that led to conditions which allowed formation of air-embolism.