| 摘要 |
PURPOSE:To accurately and safely carry out endoscopic treatments at near the center of an optical observation range by providing a flexible shaft which is curved so that when passed through a treatment tool through passage its end extends toward near the center of the optical observation range. CONSTITUTION:The end side 33a of a shaft is curved. When a treatment tool 30 is passed through a treatment tool through passage 10, the curved part 33 of the shaft of the treatment tool 30 is extended along the curve of the treatment tool through passage 10 and an end treating portion 31 is guided in such a manner as projecting to near the center of an optical observation range 4a. This position is also within an ultrasonic scanning range 3a and the end treating portion 31 appears also in an ultrasonic tomogram. In this case, no matter in which direction the treatment tool 30 is inserted into the treatment tool through passage 10, the end side shaft 33a of the treatment tool 30 comes to the curved part of the treatment tool through passage 10 and then the curve of the shaft 33a is extended along the curve of the treatment tool through passage 10 and the treatment tool 30 is naturally straightened in a fixed direction. |
