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錐體炎の完全掻爬の困難な事ぱ著者の1人仁保が昭和19年以來度々述べて來た所であるが,本邦に於ては餘り問題にされなかつた.所が今回の高原教授の宿題報告に依り,此の問題が取上げられ,私共も亦此の問題が最近特に痛切に感ぜられて來た.
本例はコペツキー,アルムーア氏法を施行して,錐體炎を可及的に掻爬している中に,錐體炎天蓋即ち錐體前面に骨内板に骨折を起し,大なる骨破片が浮動する樣になつてしまつた症例である.
NIHO and his associates report a method by whic-h a fragmented piece of petrous bone which was ac-cidently caused during the procedure of operation is successfully removed. A radical mastoidectomy is p-erform ed on the left ear of a girl aged 6 who w-as affedted with chronic running ear since the time of the child' s early infancy. The disease foci were found in the typanum, epitympanum, pre-petrous m-astoid cells and cells of the petrous body. The tym-panum was necessarily curetted and petrosotomy w-as effected by kopetsky-Almour method. But during the course of the latter procedure a ,portion of the petrous pyramid was accidently fractured through fo-rming a severed osseous fragment. This loosened fr-agment was then removed by Niho and Hirano met-hod. The wound of operation healed with complete eqithelization within the period of 2 months.
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