Device and method for through the scope endoscopic hemostatic clipping
Medical device used to cause hemostasis of blood vessels using a clip arrangement delivered to a target region through an endoscope. Method for using the device to cause hemostasis of a blood vessel through an endoscope. Medical device including a reversibly closeable clip, a locking arrangement, a control wire, a sheath, and a handle with an actuating trigger. Through the endoscope, hemostatic clipping device that is fully reversible and lockable. Hemostatic clip that reversibly targets and clips bleeding ulcers.
1. A medical device for clipping tissue, comprising:
a clip including a first leg and a second leg, the first and second legs movable relative to one another between an open tissue-receiving configuration and a closed tissue-gripping configuration, the first leg having a first inner surface and the second leg having a second inner surface;
a control member extending from a proximal end to a distal end, the control member operable both to open the first and second legs to the open tissue-receiving configuration and close the first and second legs to the closed tissue-gripping configuration; and
a flexible linkage element having a first end connected to the first inner surface of the first leg and a second end connected to the distal end of the control member, wherein the control member moving proximally pulls the second end of the flexible linkage element proximally such that the first and second legs move from the open tissue-receiving configuration to the closed-tissue gripping configuration and moving distally pushes the second end of the flexible linkage element distally such that the first and second legs move from the closed-tissue gripping configuration to the open-tissue-receiving configuration, the control member being designed to separate from the clip when the clip is deployed to permit withdrawal of the control member from the body while leaving the clip within the body clipped over target tissue.
2. The medical device of claim 1 , further comprising:
a further flexible linkage element having a first end connected to the second inner surface of the second leg and a second end connected to the distal end of the control member.
3. The medical device of claim 2 , wherein the control member moving proximally pulls the second end of the further flexible linkage element proximally such that the first and second legs move from the open tissue-receiving configuration to the closed-tissue gripping configuration and moving distally pushes the second end of the further flexible linkage element distally such that the first and second legs move from the closed-tissue gripping configuration to the open-tissue-receiving configuration.
4. The medical device of claim 1 , further comprising:
a locking element operably connected to the distal end of the control member and the second end of the flexible linkage element.
5. The medical device of claim 4 , wherein the locking element is a spherical pill.
6. The medical device of claim 5 , further comprising:
a hole extending through a central connecting portion of the clip from a distal side to a proximal side.
7. The medical device of claim 6 , wherein the hole is a one-way hole tapering from a first diameter on the distal side to a second diameter on the proximal side, the first diameter greater than the second diameter, the first diameter greater than a diameter of the spherical pill, the second diameter smaller than the diameter of the spherical pill.
8. The medical device of claim 7 , wherein the spherical pill stretches the one-way hole on the proximal side to pass therethrough, the one-way hole returning to the second diameter after the spherical pill has passed therethrough.
9. The medical device of claim 7 , wherein the spherical pill is elastic to deform while passing through the one-way hole on the proximal side, the spherical pill returning to the diameter of the spherical pill after passing through the one-way hole.
10. The medical device of claim 7 , wherein the proximal side is configured to have a compressive force applied thereto while the spherical pill passes proximally through the one-way hole.
11. The medical device of claim 1 , wherein the control member has a frangible link at a location proximal to a distal end of the control member, the frangible link configured to be broken upon a predetermined tensile load being applied thereto.
12. The medical device of claim 11 , wherein the frangible link is a taper in the control member.
13. A method for treating tissue, comprising:
inserting a clip to a target area within a living body adjacent a target tissue, the clip including a first leg and a second leg, the first and second legs movable relative to one another between an open tissue-receiving configuration and a closed tissue-gripping configuration, the first leg having a first inner surface and the second leg having a second inner surface;
moving a control member distally to move the clip to the open tissue-receiving configuration, the control member extending from a proximal end to a distal end, the distal end of the control member connected to a first end of a flexible linkage element, a second end of the flexible linkage element connected to the first inner surface of the first leg;
drawing the control member proximally to pull the second end of the flexible linkage element proximally such that the first and second legs move from the open tissue-receiving configuration to the closed-tissue gripping configuration to grasp the target tissue; and
separating the control member from the clip when the clip is deployed to permit withdrawal of the control member from the body while leaving the clip within the body clipped over target tissue.
14. The method of claim 13 , wherein the distal end of the control member and the first end of the flexible linkage element is connected to a locking element.
15. The method of claim 14 , wherein a central connecting portion of the clip has a hole extending from a distal side to a proximal side.
16. The method of claim 15 , wherein the hole is a one-way hole tapering from a first diameter on the distal side to a second diameter on the proximal side, the first diameter greater than the second diameter, the first diameter greater than a diameter of the locking element, the second diameter smaller than the diameter of the locking element.
17. The method of claim 16 , wherein the control member being drawn proximally pulls the locking element through the hole locking the clip in the closed tissue-gripping configuration.
18. The method of claim 13 , further comprising:
separating the control member from the clip by applying at least a predetermined tensile load on the control member while the control member is being drawn proximally to break a frangible link located on the control member at a location proximal to a distal end thereof, the frangible link configured to be broken upon the predetermined tensile load being applied thereto.