| 主权项 |
1. An elastic band ligation device for treatment of hemorrhoidal tissue, comprising:
an inner tubular member having an inner surface, a front end and a rear end, for retaining a stretched elastic band over the front end thereof, the front end having an opening, the inner tubular member extending for a sufficient distance for insertion into a rectum of a patient, a plunger in the inner tubular member with a handle means extending away from the rear end of the inner tubular member, the handle means for sliding the plunger away from the front end of the inner tubular member to provide a suction for drawing hemorrhoidal tissue into the inner tubular member through the opening at the front end, an obturator having an end with an outer surface and a distal tip, said obturator being connected to the plunger within the inner tubular member, an outer tubular pusher sleeve having an inner configuration corresponding to that of the inner tubular member to provide a limited friction fit over the inner tubular member, with an external end of the outer tubular pusher sleeve being positionable adjacent a stretched elastic band on said inner tubular member, wherein the outer surface of the end of the obturator is convergent towards the distal tip of the obturator and creates an angle of about 5-25 degrees between the outer surface of the obturator end and the inner surface of the inner tubular member. |
