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多年来耳鼻喉科工作者即深感鼻咽及喉的检查存在着一定困难。1975年经Machida厂改进的纤维鼻咽喉镜问世:其重量为0.2公斤,全长45厘米(包括操纵部分)有效长度为25厘米,直径为3.9毫米。为了能通过新生儿和成人的鼻腔,其直径最大不能超过4毫米。前端可向下弯曲90°,可作360°任何方向的旋转。控制钮在近侧端,可用一拇指来操纵。其视野为70°,焦距的深度为5～50毫米。
Otolaryngology workers for many years that is deep nasopharyngeal and laryngeal examination there are some difficulties. 1975 年 Machida plant improved fiber nasopharyngeal laryngoscope advent: Its weight is 0.2 kg, a total length of 45 cm (including the operating part) effective length of 25 cm, a diameter of 3.9 mm. In order to be able to pass through the nasal passages of newborns and adults, the maximum diameter can not exceed 4 mm. The front end can be bent downward 90 °, 360 ° for any direction of rotation. Control button at the proximal end, a thumb to manipulate. The field of view of 70 °, the focal length of the depth of 5 to 50 mm.