| 摘要 |
A double-tubed instrument for endoscopic ligation is provided with two separate tubes with bands and a piston next to the last band mounted on the internal tube. The internal tube with bands and piston is put inside of the external tube; a flexible cone-shaped tubular adapter secured both tubes as a tubular instrument at one end, which connects the instrument at the inserting end of the endoscope. The piston moves freely between the tubes and secures completely a sealed space under from the cone-shaped tubular adapter creating a hydraulic tank between the piston and the cone-shaped tubular adapter, which is connected with a conduit for conveying liquid in and stores the liquid serving as the driving force to move bands forward and dislodge the aimed elastic band one at a time to effect the ligation of multiple lesions during a single insertion of the endoscope.
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