| 摘要 |
An endoscope (E, E', E") has a sterilizable, reusable, elongated, optical capsule section (C, C') and a separable, disposable, sterile channel section (S). The capsule (C, C') has a window at a distal end in front of an image sensor (14). Image transmitting electronic cables (16), connected to the image sensor (14), extend proximally from the capsule (C, C'). Light transmitting fibers (20) extend from the window proximally for transmitting light to a site under investigation from a remote light source. The channel section (S) is removably attached in a fixed position to the capsule (C) and has plurality of longitudinal channels (24, 26) for transmitting fluids or for receiving an operative instrument. A flexible tube is connected to the proximal end of each channel for supplying fluid or for manipulating the operative instrument from a remote location. The separable section (S) is disposable after use. An umbilicated balloon catheter (130) or a telescopic catheter (160) can be used to position the tethered endoscope (E) in a passageway. Circumferentially spaced fluid vents (176) can supply jets of gas or liquid selectively to position the endoscope (E). Alternatively, a magnet (184) can be used for manipulating a cpasule (C) with a ferrous housing along a passageway by use of a strong magnet (184) located exteriorally thereof.
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