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因为外耳道前壁突出,常使鼓膜外耳道前角看不清楚。作者应用了一种简单方法:使病人仰卧,头略偏向对侧;耳道内滴入一些清水,由于水的折光作用和表面张力以及耳道的形状和病人头部位置,借助水柱的凸面倾斜度与显徽镜的光学轴线关系,在双目显微镜下,常能满意地看到鼓膜外耳道前角。注意滴入外耳道的水不要带酒精,因酒精可使外耳道渗出物中的蛋白凝固呈云雾状而看不清楚。盐水也不比净水好。通过缓慢地向外耳道内
Because the external auditory canal front prominent, often eardrum eardrum eyelid can not see clearly. The authors applied a simple method: the patient supine, slightly biased to the opposite side; some water dripping into the ear canal, due to refraction of water and surface tension and the shape of the ear canal and the patient’s head position, with the water column convex inclination With the emblem of the optical axis of the emblem, in the binocular microscope, can often see the eardrum anterior horn eardrum. Note that the water drops into the external auditory canal do not bring alcohol, because the alcohol can make the exudate of the external ear canal coagulation material was cloudy and can not see clearly. Saltwater is no better than water. Pass slowly into the external auditory canal