With Teflon, and a tiny stainless steel needle of a number 7 injector and an acupuncture needle,Teflon-piston and a measurer of the stapes height were prepared respectively of stapedotomy for treatment of otosclerosis.

• 目的制备镫骨高度测量器和活塞型人工镫骨,用于人工镫骨手术治疗耳硬化症。 方法用细不锈钢丝和特氟隆制作活塞型人工镫骨,用7号长注射针头和银针制作镫骨高度测量器。