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目的对正常成人咽鼓管咽口进行观察，找出可以描述咽鼓管咽口的量化指标，为进一步研究奠定基础。方法利用鼻咽内窥镜观察并录像记录５８例正常成人咽鼓管咽口。分别用０°，３０°，６０°，９０°内窥镜观察鼻咽部和咽鼓管咽口。结果经比较认为，６０°内窥镜是观察咽口及鼻咽侧壁的最佳角度。该角度镜面与咽口平面平行，观察咽口最直观，对于咽口处于开放状态时，此角度能窥及管内情况。而且通过镜面的旋转和上下左右移动，可以清楚地观察圆枕、前唇、提肌隆突、咽隐窝和下鼻甲后端在鼻腔侧壁的附着处。０°镜观察鼻咽顶壁和后壁视野清晰。结论提出：①提肌隆突在咽口内形成的弓形皱襞的前缘与鼻腔外侧壁的夹角，②提肌隆突后缘与咽口前壁的夹角，③圆枕与咽口前唇的相对厚度，④咽口静止时的开放状态及⑤吞咽时咽口的运动方式作为描述咽口形态的量化指标，并以此为根据，将咽口形态分为椭圆形２．６％，喇叭形１９．８％，三角形６８．１％，缝隙形９．５％。本研究为计算机辅助图像分析咽鼓管咽口形态奠定基础
Objective To observe the eustachian tube pharynx mouth of normal adults and find out the quantitative indexes that can describe the eustachian tube pharynx mouth, which lays the foundation for further research. Methods 58 cases of normal adult eustachian tube pharynx were observed and recorded by nasopharyngeal endoscopy. Nasopharynx and eustachian tube were observed with 0 °, 30 °, 60 ° and 90 ° endoscope respectively. The results of the comparison that the 60 ° endoscope is to observe the pharyngeal and nasopharyngeal wall angle best. The angle mirror plane parallel to the pharyngeal orifice, pharyngeal observation of the most intuitive, for the pharyngeal orifice is open, this perspective can peep inside the tube. And through the rotation of the mirror and move up, down, left and right, you can clearly observe the occipital, anterior lip, levator muscle, pharyngeal recess and inferior turbinate posterior end of the nasal cavity wall attachment. 0 ° mirror observation of the top and rear nasopharynx clear vision. Conclusions: ① the angle between the front edge of the tympanic crease and the lateral wall of the nasal cavity in the pharyngeal orifice; ② the angle between the posterior edge of the levator peduncle and the anterior pharyngeal wall; Of the relative thickness, ④ open when the pharynx still open and ⑤ pharyngeal swallowing pharyngeal mouth movements as a quantitative description of the indicators, and based on this, the pharyngeal orifice morphology is divided into oval 2.6%, horn 19.8% of shape, 68.1% of triangle, and 9.5% of slit shape. This study laid the foundation for computer-assisted image analysis of eustachian tube pharyngeal orifice morphology