作者连续调查经迷路听神经瘤切除术病人50例,术中以4～5mm直径切割钻头钻乳突,以1～2mm直径切割钻头切除迷路,以2～4mm会刚石钻头磨去紧贴乙状窦、岩上窦、中后颅窝硬膜、面神经、颈静脉球的骨质以及内耳道及内耳门周围骨质。采用Kavo牌电钻,悬吊在1.8米高架上,用隔音罩使手术室中噪音减至40dB左右,手术时遮盖病人并使对侧耳向下而卧,使之与机器噪声隔绝。电钻转速为每秒 The author of a continuous investigation of 50 patients undergoing excision of acoustic neuroma excision, surgery to 4 ~ 5mm diameter drill drill drill, with 1 ~ 2mm diameter cut drill removal lost, to 2 ~ 4mm will diamond drill worn close to the sigmoid Sinus, petrous sinus, middle posterior fossa dura, facial nerve, jugular bulb bone and the bone around the inner ear canal and the inner ear. Kavo brand electric drill, suspended in a 1.8 m overhead, with a noise enclosure to make the operating room noise reduced to 40dB or so, covering the patient during surgery and the contralateral ears down and lying, so that machine noise isolation. Drill speed is every second