Patent ID: 9622750
Date: 2017-04-18
CPC Classifications: A61B

Claim:
1. An elastic band ligation device for treatment of hemorrhoidal tissue, comprising: an inner tubular member having an inner surface, an outer 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 outer tubular pusher sleeve having an inner configuration corresponding to that of the inner tubular member to provide a limited friction fit with the outer surface of the inner tubular member, with an external end of the outer tubular pusher sleeve positionable adjacent a stretched elastic band; a locking mechanism provided at an opposite end of the outer tubular pusher sleeve for locking the outer pusher sleeve and the inner tubular member to prevent movement of the outer tubular pusher sleeve towards the front end of the inner tubular member, said locking mechanism comprising a tab formed in said opposite end of said outer tubular pusher sleeve, a locking ring positioned on said outer surface of said inner tubular member, said locking ring having an abutment surface which extends outwardly from the outer surface of the inner tubular member towards the tab, said tab having a lug extending transversely from the tab towards the inner tubular member and into engagement with said abutment surface to prevent movement of the outer tubular pusher sleeve towards the front end of the inner tubular member, said tab when pressed in use disengaging the outer tubular pusher sleeve from the inner tubular member and allowing the outer tubular pusher sleeve to be moved towards the front end of the inner tubular member and into contact with the elastic band to urge the elastic band away from the front end of the inner tubular member and into engagement with hemorrhoidal tissue extending through the opening in the inner tubular member; said outer pusher sleeve further comprising cut-outs adjacent the tab for permitting adjustment to tune a force required to deflect the tab away from the inner tubular member.