Causse J B, Causse J R, Bel J, Michaux P, Cezard R, Michat M, Canut Y, Resseguier P, Parahy C
Ann Otolaryngol Chir Cervicofac. 1985;102(6):401-5.
The footplate fenestra should be performed in its posterior third part to avoid pressure of the piston on the membranous labyrinth, situated very close to the footplate in 2% of the cases in otosclerotic patients. Gain in bone conduction differs according to the size of the fenestra performed. Low frequencies improve most when the whole posterior third part of the footplate is removed; the audiometric gain is better for high frequencies when a 0.8 mm stapedotomy is performed. These findings demonstrate the interest of a more or less enlarged fenestra according to the language spoken by the patient, since the different languages use mainly high or low frequency phonemes.
镫骨足板开窗应在其后三分之一部分进行，以避免活塞对膜迷路产生压力，在耳硬化症患者中，2%的病例中膜迷路非常靠近足板。骨导增益因开窗大小而异。当切除足板整个后三分之一部分时，低频改善最为明显；进行0.8毫米镫骨切除术时，高频的听力增益更好。这些发现表明，根据患者所使用的语言，或多或少扩大开窗是有意义的，因为不同的语言主要使用高频或低频音素。
