Elastic band ligation device with locking mechanism and method for treatment of hemorrhoids
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61B-017/12
A61B-017/00
출원번호
US-0972168
(2013-08-21)
등록번호
US-9622750
(2017-04-18)
발명자
/ 주소
Chotenovsky, David
Guttenplan, Mitchel
출원인 / 주소
CRH MEDICAL CORPORATION
대리인 / 주소
Nixon & Vanderhye P.C.
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
Elastic band ligation device for treating hemorrhoidal tissue, including an inner tube for retaining an elastic band, a plunger in the inner tube for drawing hemorrhoidal tissue into the inner tube, and an outer tube pusher sleeve disposed over the inner tube. A thumb pusher on the sleeve allows the
Elastic band ligation device for treating hemorrhoidal tissue, including an inner tube for retaining an elastic band, a plunger in the inner tube for drawing hemorrhoidal tissue into the inner tube, and an outer tube pusher sleeve disposed over the inner tube. A thumb pusher on the sleeve allows the operator to push the sleeve towards the front of the inner tube to deploy the elastic band from the front end of the inner tube onto hemorrhoidal tissue drawn into the inner tube. The sleeve has a locking mechanism including a tab for locking the sleeve to the inner tube to prevent relative movement of the sleeve and inner tube until the sleeve is unlocked by the user, thereby preventing premature deployment of an elastic band.
대표청구항▼
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 me
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. 2. The elastic band ligation device according to claim 1, wherein upon pushing the tab away from the inner tubular member, the lug moves out of abutting relationship with the abutment surface which allows the outer tubular pusher sleeve to be moved relative to the inner tubular member towards the front end of the device, thereby to push an elastic band off the front end of the device onto hemorrhoidal tissue. 3. The elastic ligation device according to claim 1, wherein a circumferential ring marker is provided on an external circumference of the outer tubular pusher sleeve as a depth marker to a user with regard to an extent of insertion of the device into the rectum of the patient. 4. The elastic ligation device according to claim 1, further comprising an elastic band introducer for facilitating introduction of elastic bands onto the inner tubular member. 5. The elastic ligation device according to claim 4, wherein the elastic band introducer has a tapered region and a flat region. 6. The elastic ligation device according to claim 5, wherein the elastic band introducer has surface ribs and channels extending along the tapered region. 7. The elastic band ligation device according to claim 6, wherein the introducer has a slot in the flat region which receives the distal end of the inner tubular member. 8. The elastic band ligation device according to claim 1, further comprising an obturator disposed within the inner tubular member. 9. The elastic band ligation device according to claim 8, wherein the obturator and the plunger are integrally formed. 10. The elastic band ligation device according to claim 8, wherein an outer surface of an end of the obturator is convergent towards a distal tip of the obturator and creates an angle of 30 degrees or less between the outer surface of the obturator end and an inner surface of the inner tubular member. 11. The elastic band ligation device according to claim 10, wherein the angle is 5-25 degrees. 12. The elastic band ligation device according to claim 8, wherein a distal end of the obturator has a region of reduced diameter towards a tip to facilitate entry of the device into the rectum of the patient and to reduce pinching of tissue as the obturator is withdrawn into the device after deployment of the elastic band onto the hemorrhoidal tissue. 13. The elastic band ligation device according to claim 8, wherein a flexible anti-pinch wiper element material is connected to an end of the inner tubular member and abuts against an outer surface of an end of the obturator to prevent tissue from being trapped or pinched between the outer surface of the end of the obturator and an inner surface of the inner tubular member. 14. The elastic band ligation device according to claim 13, wherein the wiper element is flexible and is made of a thin plastics material. 15. The elastic band ligation device according to claim 1, wherein an end of the obturator has parallel walls rounded at a tip of the obturator, to reduce pinching of tissue.
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이 특허에 인용된 특허 (3)
Ghareeb,Essam Mohamed, Device for enabling the treatment of hemorrhoids.
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