Single Stage hemostasis clipping device

Patent metadata

Field	Value
Publication number	US-9895154-B2
Application number	US-201213426297-A
Country	US
Kind code	B2
Filing date	Mar 21, 2012
Priority date	May 3, 2007
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

A tissue clipping apparatus comprises a clip including a proximal end received within a capsule. The clip includes a clip locking member biased to engage a first locking structure of the capsule to lock the clip in the capsule in a closed configuration. The apparatus also comprises a tension member releasably coupling the clip to a proximal end of the device which, during use, remains accessible to a user. The tension member is coupled to the clip by a joint designed to release when subject to a predetermined load to separate the clip from the device, release of the joint releasing the locking member to engage the first locking structure.

First claim

What is claimed is:

1. A tissue clipping device, comprising:
a flexible insertion member extending between a distal end which, during use, is inserted to a target site within a living body and a proximal end coupled to a handle which remains outside the body accessible to a user of the device;
a capsule releasably coupled to the distal end of the insertion member, the capsule housing a clip including a plurality of clip arms, proximal ends of each of the arms being received within the capsule, at least a first one of the arms including a locking member biased to engage a first locking structure of the capsule to lock the clip within the capsule in a closed configuration; and
a tension member extending through the insertion member releasably coupling the clip to the handle, a distal end of the tension member directly coupled to the proximal ends of the clip arms and interlocking the proximal ends of the clip arms, the distal end of the tension member being configured to release when subject to a predetermined load to separate the clip and the capsule from the insertion member, release of the distal end of the tension member freeing the proximal end of the first arm from the tension member such that the locking member moves radially outward to engage the first locking structure.

2. The device of claim 1 , further comprising a bushing releasably coupling the capsule to the distal end of the flexible member, the bushing including a bushing locking feature biased toward an unlocked position.

3. The device of claim 2 , further comprising a support received within the bushing to urge the bushing locking feature into engagement with a second locking structure of the capsule.

4. The device of claim 3 , further comprising a plunger coupled to the tension member, release of the distal end of the tension member moving the plunger proximally to dislodge the support and release the bushing from the capsule.

5. The device of claim 4 , wherein a distal movement of the plunger relative to the capsule pushes the clip to an open configuration in which the arms are separated from one another.

6. The device of claim 2 , wherein a single opening in the capsule forms the first and second locking structures and the clip locking member comprises a tab aligned with the opening.

7. The device of claim 2 , wherein the bushing locking feature includes a tab biased toward a centerline of the bushing and wherein the second locking structure of the capsule comprises an opening into which the support urges the tab.

8. The device of claim 1 , wherein the distal end of the tension member includes a curved portion received within a corresponding space of the clip, the curved portion straightening when subject to the predetermined load to release the tension member from the clip.

9. The device of claim 8 , wherein the tension member comprises a wire.

10. The device of claim 1 , wherein the capsule includes a tab bent into an interior of the capsule to hold the clip before deployment and to cam arms thereof open during deployment.

11. A tissue clipping device, comprising:
a flexible insertion member extending between a distal end which, during use, is inserted to a target site within a living body and a proximal end coupled to a handle which remains outside the body accessible to a user of the device;
a capsule releasably coupled to the distal end of the insertion member via a bushing, the capsule housing a clip including a plurality of clip arms, proximal ends of each of the arms being received within the capsule, at least a first one of the arms including a locking member biased to engage a first locking structure of the capsule to lock the clip within the capsule in a closed configuration; and
a tension member extending through the insertion member releasably coupling the clip to the handle, a distal end of the tension member being directly coupled to the proximal ends of the clip arms and interlocking the proximal ends of the clip arms, the distal end of the tension member being configured to release when subject to a predetermined load to separate the clip and the capsule from the insertion member, release of the distal end of the tension member freeing the proximal end of the first arm to move radially outward such that the locking member engages the first locking structure.

12. The device of claim 11 , further comprising an interlock tube in an interference fit between the capsule and the bushing.

13. The device of claim 12 , further comprising a plunger coupled to the tension member, release of the distal end of the tension member moving the plunger proximally to move the interlock tube into the bushing.

14. The device of claim 13 , wherein, when the interlock tube is pushed into the bushing, it displaces a first tab of the capsule from a corresponding window of the bushing.

15. The device of claim 14 , wherein a proximal end of the capsule includes a second tab engaging an abutting surface of the interlock tube.

16. The device of claim 13 , wherein a distal movement of the plunger relative to the capsule pushes the clip to an open configuration in which the arms are separated from one another.

17. The device of claim 11 , wherein the distal end of the tension member includes a curved portion received within a corresponding space of the clip, the curved portion straightening when subject to the predetermined load to release the tension member from the clip.

18. A tissue clipping device, comprising:
a flexible insertion member extending between a distal end which, during use, is inserted to a target site within a living body and a proximal end coupled to a handle which remains outside the body accessible to a user of the device;
a capsule releasably coupled to the distal end of the insertion member, the capsule housing a clip including a plurality of clip arms, proximal ends of each of the arms being received within the capsule, at least a first one of the arms including a locking member biased to engage a first locking structure of the capsule to lock the clip within the capsule in a closed configuration;
a tension member extending through the insertion member releasably coupling the clip to the handle, a distal end of the tension member interlocking the proximal ends of the clip arms and being configured to release when subject to a predetermined load to separate the clip and the capsule from the insertion member, release of the distal end of the tension member releasing the proximal end of the first arm such that the locking member engages the first locking structure; and
a bushing releasably coupling the capsule to the distal end of the flexible member, the bushing including a bushing locking feature biased toward an unlocked position.

19. The device of claim 18 , wherein the distal end of the tension member includes a curved portion received within a corresponding space of the clip, the curved portion straightening when subject to the predetermined load to release the tension member from the clip.

20. The device of claim 18 , wherein the capsule includes a tab bent into an interior of the capsule to hold the clip before deployment and to cam arms thereof open during deployment.

Assignees

• Cohen Adam L
• Ogle Bryan R
• Durgin Russell F
• Furnish Gregory R
• Goldenbogen Michael
• Jordan Gary A
• Morris Benjamin E
• Griffin Mark A
• Kelly William C Mers
• Abramov Vasily P
• Boston Scient Scimed Inc

Inventors

• Cohen Adam L
• Ogle Bryan R
• Durgin Russell F
• Furnish Gregory R
• Goldenbogen Michael
• Jordan Gary A
• Morris Benjamin E
• Griffin Mark A
• Kelly William C Mers
• Abramov Vasily P

Classifications

• A61B2017/2929

  with a head rotatable about the longitudinal axis of the shaft · CPC title

• A61B2090/037

  with a frangible part, e.g. by reduced diameter · CPC title

• A61B17/1227

  Spring clips · CPC title

• A61B17/1285 Primary

  for minimally invasive surgery · CPC title

• A61B17/122

  Clamps or clips, e.g. for the umbilical cord {(for the vas deferens A61F6/206)} · CPC title