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, comprising:
a clip including first and second clip arms, the clip being movable between an open tissue receiving configuration in which the first and second arms are separated from one another by a distance selected to receive tissue therebetween and a closed configuration in which the first and second arms are moved inward to capture the tissue received therebetween; and
an opening element engaging inner walls of the first and second clip arms, the opening element urging the first and second clip arms away from one another into the open tissue-receiving configuration, wherein the opening element is movable between an expanded configuration and a retracted configuration to correspond to a movement of the clip between the open tissue receiving configuration and the closed configuration.
2. The medical device of claim 1 , wherein the opening element comprises first and second link arms engaging the inner surfaces of the first and second clip arms, respectively.
3. The medical device of claim 2 , wherein when the clip is in the open tissue receiving configuration, the first and second link arms are axially aligned with one another.
4. The medical device of claim 1 , wherein a proximal end of the clip is coupled to a control wire via a separable link.
5. The medical device of claim 4 , wherein a distal end of the control wire includes an increased width portion formed to removably engage the clip.
6. The medical device of claim 4 , wherein application of a proximal tensile force to the control wire causes movement of the clip from the open tissue receiving configuration to the closed configuration.
7. The medical device of claim 6 , wherein application of a proximal tensile force greater than a predetermined threshold value causes the clip to lock in the closed configuration.
8. The medical device of claim 7 , wherein application of a proximal tensile force greater than the predetermined threshold value causes the control wire to disengage from the clip.
9. The medical device of claim 6 , wherein application of a distally directed force to the control wire causes movement of the clip from the closed configuration to the open tissue receiving configuration.
10. The medical device of claim 1 , wherein a distal length of the first clip arm includes a first offset tip extending along an axis offset relative to a longitudinal axis of the first clip arm and wherein a distal length of the second clip arm includes a second offset tip extending along an axis offset relative to a longitudinal axis of the second clip arm.
11. The medical device of claim 1 , wherein a distal length of the first clip arm includes a first offset tip extending along an axis offset relative to a longitudinal axis of the first clip arm and wherein a distal length of the second clip arm includes a second offset tip extending along an axis offset relative to a longitudinal axis of the second clip arm.
12. A medical device, comprising:
a clip including first and second clip arms, the clip being movable between an open tissue receiving configuration in which the first and second arms are separated from one another by a distance selected to receive tissue therebetween and a closed configuration in which the first and second arms are moved inward to capture the tissue received therebetween;
an opening element engaging inner walls of the first and second clip arms, the opening element urging the first and second clip arms away from one another into the open tissue-receiving configuration, wherein the opening element is movable between an expanded configuration and a retracted configuration to correspond to a movement of the clip between the open tissue receiving configuration and the closed configuration; and
a control wire coupled to a proximal end of the clip and operable to move the clip between the open and closed configurations.
13. The medical device of claim 12 , wherein the opening element comprises first and second link arms engaging the inner surfaces of the first and second clip arms, respectively.
14. The medical device of claim 13 , wherein when the clip is in the open tissue receiving configuration, the first and second link arms are axially aligned with one another.
15. The medical device of claim 12 , wherein a proximal end of the clip includes an opening formed to receive a control wire.
16. The medical device of claim 15 , wherein application of a proximal tensile force to the control wire causes movement of the clip from the open tissue receiving configuration to the closed configuration.
17. The medical device of claim 16 , wherein application of a proximal tensile force greater than a predetermined threshold value causes one or both of a locking of the clip in the closed configuration and a disengagement of the control wire from the clip.
18. The medical device of claim 16 , wherein application of a distally directed force to the control wire causes movement of the clip from the closed configuration to the open tissue receiving configuration.
19. The medical device of claim 12 , wherein a distal end of the control wire includes an increased width portion formed to removably engage the clip.
20. A method for capturing tissue, comprising:
inserting a medical device comprising a clip having first and second clip arms to a target tissue site, the clip including an opening element engaging inner walls of the first and second clip arms and urging the clip to an open tissue receiving configuration;
moving a control wire coupled to a proximal end of the clip distally to move the first and second clip arms away from one another to the open tissue receiving configuration;
moving the control wire proximally to move the first and second clip arms toward one another to a closed tissue capturing configuration; and
applying a proximal tensile force exceeding a threshold level to the control wire to separate the control wire from the clip.