Multiple hemoclip system for an endoscope
Spring clips are arranged end to end in a cavity of an inner shaft. Such shaft slides within an outer shaft, and a pusher member slides in the cavity behind the clips. The clips have jaws biased together, but which are wedged apart by an opener as the pusher is moved distally. An opened clip is ejected by relative movement of the inner and outer shafts to clamp body tissue at a desired site.
1. A method, comprising:
inserting a distal segment of a tissue clipping device into a living body until a distal end is adjacent target tissue, the device including an outer shaft slidably receiving an inner shaft therein, the inner shaft forming an elongated cavity with a first clip slidably received therein, the first clip including opposing jaws biased toward one another;
operating a pusher member enclosed within and slideably received in the inner shaft distally through the inner shaft to slide the first clip through the cavity until the opposing jaws of the first clip contact a wedging side of a clip opening component at the distal end of the inner shaft to separate the jaws of the first clip from one another, the pusher member being operated to move the first clip distally until the jaws project from the distal end of the device;
receiving the target tissue between the opposing jaws of the first clip;
releasing the opposing jaws of the first clip to capture the target tissue therebetween under a clamping force provided by the bias of the opposing jaws of the first clip; and
ejecting the first clip distally from the device by moving the outer shaft distally relative to the first clip, the first clip including a projection engaging a distal portion of the outer shaft as the outer shaft is moved distally relative to the first clip as the first clip is ejected from the elongated inner shaft.
2. The method of claim 1 , wherein the cavity includes a plurality of further clips arranged end to end.
3. The method of claim 2 , wherein each further clip includes the same elements as the first clip and, after the first clip has been ejected from the device, a distal-most one of the further clips is deployed using the same steps as for the first clip.
4. The method of claim 1 , further comprising:
operating a handle of the device that has separate, relatively moveable components connected to the proximate portions of the outer shaft, the inner shaft and the pusher member to manually control the relative positions thereof.
5. The method of claim 4 , wherein the moveable components of the handle include a proximate extension connected to the inner shaft, a spool mounted on the proximate extension, and a operating component carried by one of the proximate extension and the spool that is connected to the pusher member to move the pusher member within the inner shaft.
6. The method of claim 5 , wherein the moveable components of the handle are shaped and configured to rotationally move the inner shaft relative to the outer shaft to position a distal-most one of the further clips within the inner shaft.
7. The method of claim 5 , wherein the operating component includes a slide moveable relative to the spool.
8. The method of claim 5 , wherein the operating component includes a rotatable dial mounted on the spool.