As for the variable line of sight type endoscope, it is possible because visualization is actualized to arrange in position of desire inside the ear, the nose, the throat, the secondary nasal cavity or the cranium. With one use method, adjusting the variable line of sight type endoscope in 1st line of sight of approximately 0 - approximately 15 vis-a-vis the longitudinal direction axis of the endoscope, it introduces into the nasal cavity. The device for remedy is introduced into the nasal cavity, the endoscope adjusts in the 2nd line of sight which faces to the open part or the passage of the secondary nasal cavity. With this method furthermore, the device for remedy to opening circles of the secondary nasal cavity, it advances or via the open part, it recognizes at least one of the open part or the passage of the secondary nasal cavity or the devices for remedy making use of the endoscope which adjusted to 2nd line of sight.可変視野方向型内視鏡は、可視化を実現するために耳、鼻、咽喉、副鼻腔、又は頭蓋内の所望の位置に配置することが可能である。一使用方法では、可変視野方向型内視鏡を内視鏡の長手方向軸に対して約0°~約15°の第1の視野方向に調節して鼻腔内に導入する。治療用装置を鼻腔内に導入し、内視鏡を副鼻腔の開口部又は通路に向かう第2の視野方向に調節する。本方法では更に、治療用装置を副鼻腔の開口部内に、又は開口部を通じて進め、第2の視野方向に調節された内視鏡を用いて副鼻腔の開口部若しくは通路、又は治療用装置の少なくとも1つを視認する。
