耳科医生在进行中耳手术时,常常碰到面神经变异的问题,稍有不慎则可能伤及,故了解其变异情况,做到心中有数,至为重要。据文献报告,面神经在颢骨段的变异有如下几类: 1.面神经骨管的自然缺损。Shambaugh氏在中耳手术病例中观察到的面神经骨管有缺口者占5％,而Andrew Bayter(1971)检查535个颞骨,骨管有缺口者竞占55％, Ear doctors in the middle ear surgery, facial nerve often encountered the problem of variation, a little careless may be injured, so to understand the variation, be aware of, it is important. According to the literature, there are several types of facial nerve changes in the stapes: 1. Natural defects of the facial nerve tube. Shambaugh’s 5% of the facial nerve tube defects were observed in the middle ear surgery cases, while Andrew Bayter (1971) examined 535 temporal muscles with a 55%