Hartwein J
Universitäts-Hals-Nasen-Ohrenklinik Hamburg-Eppendorf.
Laryngorhinootologie. 1991 Aug;70(8):409-11. doi: 10.1055/s-2007-998064.
Bifenestration as an operation for hearing improvement is described in a case of congenital absence of the oval and round window. Besides the classical fenestration of the horizontal semicircular duct, an artificial round window was performed in the middle ear. Due to the acoustic resonance of the mastoid cavity, the resulting conductive loss in the higher frequencies was only 20-30 dB.
在一例先天性卵圆窗和圆窗缺失的病例中，描述了双开窗术作为一种改善听力的手术。除了经典的水平半规管开窗术外，还在中耳进行了人工圆窗手术。由于乳突腔的声共振，高频段产生的传导性听力损失仅为20 - 30分贝。
