| 摘要 |
An endoscopic instrument for ligating multiple lesions within a hollow body organ. A plurality of cords (103) are laid over the tube (101) to extend longitudinally thereon and be folded over the distal end of the tube. A plurality of elastic rings (50) are mounted on the tube (101) in stretched condition and overlaying the cords (103). The segment of each cord (103) between each pair of adjacent rings (50) is in slack condition and of a length which equals or exceeds the distance of the tube's distal end to the furthest ring of the pair. By a trip cord (105) threaded through a working channel (19) of the endoscope and connected to the cords (103), a pull can be exerted thereon to simultaneously retract the cords (103) and dislodge each of the rings in controlled stepped sequence in a procedure wherein only one elastic ring at a time moves over uhe tube in the process of its dislodgement to ligate a lesion which has been suctioned part way into the tube (101).
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