经口途径硬管角度内窥镜在鼻咽部观察视野和手术操作区域等许多方面优于经典经鼻途径。患者卧位、放置开门器，选70o角已涂防雾剂的硬管内窥镜，助手持镜，手术者可根据电视画面双手操作器械。经回途径提供了观察鼻咽部的理想视野，可直视后鼻孔及犁骨、鼻甲后端、咽隐窝、咽鼓 Oral Routes Hard tube endoscopes are superior to classic nasal routes in many aspects, such as nasopharynx visual field and surgical procedures. Patient lying, place the door opener, selected 70o angle has been coated with anti-fog endoscopic hard tube, assistant with a mirror, the operator can operate the device according to the TV screen with both hands. Back through the path provides the ideal view of the nasopharynx can be directly after the nostrils and vials, turbinate posterior end, pharyngeal recess, pharyngeal drum