Through the scope tension member release clip

Patent metadata

Field	Value
Publication number	US-10154842-B2
Application number	US-201213463560-A
Country	US
Kind code	B2
Filing date	May 3, 2012
Priority date	May 4, 2011
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

An apparatus for deployment of a hemostatic clip includes a clip assembly releasably coupled to a distal portion of a shaft, wherein the clip assembly includes a capsule releasably coupled to the shaft, clip arms slidably received within the capsule and cooperating with the capsule to provide a first user feedback indicating a decision configuration of the clip assembly and a yoke slidably received within the capsule, the yoke including proximal and distal portions releasably and rotatably connected to one another via a first control wire, a distal end of the distal portion being connected to proximal ends of the clip arms. A second control wire extends from the handle assembly and is coupled to a proximal end of the second portion to move the clip assembly between open and closed configurations.

First claim

What is claimed is:

1. An apparatus for deployment of a hemostatic clip, comprising:
a handle assembly;
a shaft connected to a distal portion of the handle assembly;
a clip assembly releasably coupled to a distal portion of the shaft, the clip assembly including:
a capsule releasably coupled to the shaft;
clip arms slidably received within the capsule and cooperating with the capsule to provide a first user feedback indicating a decision configuration of the clip assembly; and
a yoke slidably received within the capsule, the yoke including proximal and distal portions releasably and rotatably connected to one another via a first control wire, a distal end of the distal portion being connected to proximal ends of the clip arms; and

a second control wire extending from the handle assembly and coupled to a proximal end of the proximal portion of the yoke to move the clip assembly between open and closed configurations.

2. The apparatus according to claim 1 , wherein the first control wire includes a ball connector at a proximal end thereof, the ball connector being coupled to the proximal portion of the yoke, separation of the first control wire from the proximal portion of the yoke separating the proximal and distal portions of the yoke from one another and providing a second user feedback.

3. The apparatus according to claim 2 , wherein the first control wire further comprises a reduced diameter section adjacent to the ball connector, the reduced diameter section yielding when a tension in the control wire reaches a predetermined yield tension.

4. The apparatus according to claim 2 , wherein the proximal portion of the yoke includes a ball cavity configured to retain the ball connector of the first control wire therein until a tension in the control wire reaches a predetermined yield tension.

5. The apparatus according to claim 3 , wherein the yield tension is between approximately 10 lbf and 20 lbf.

6. The apparatus according to claim 1 , further comprising:
an over sheath movable between a first position covering the shaft and the clip assembly and a second position uncovering the clip assembly.

7. The apparatus according to claim 1 , further comprising:
a tension member releasably connected between the distal portion of the yoke and the clip arms and biasing the clip arms toward an open configuration, wherein the tension member releases from the yoke when the second control wire is moved proximally beyond the position at which the first user feedback is provided.

8. The apparatus according to claim 7 , wherein the tension member and the yoke are releasably connected to one another by mating male and female C section members.

9. The apparatus according to claim 7 , wherein separation of the yoke from the tension member occurs by one of fracture and deformation of the male C section member.

10. The apparatus according to claim 7 , wherein separation of the yoke from the tension member occurs when a tension on the first control wire tension is at least a predetermined separation tension.

11. The apparatus according to claim 10 , wherein the separation tension is at least approximately 4 lbf.

12. The apparatus according to claim 10 , wherein the separation tension is less than approximately 12 lbf.

13. The apparatus according to claim 7 , wherein separation of the yoke from the tension member locks the clip arms in a closed configuration by sliding the tension member and the clip arms proximally within the capsule.

14. The apparatus according to claim 7 , wherein distal movement of the control wire, before separation of the yoke from the tension member, slides the clip arms distally out of the capsule into an open configuration.

15. A flexible clip deployment apparatus insertable to locations within a body through an endoscope, comprising:
an elongated member extending from a proximal end to a distal end, the elongated member being flexible to be inserted to a target location via a natural body lumen;
a bushing coupled to the distal end of the elongated member;
a capsule releasably connected to the bushing;
clip arms slidable within the capsule between open and closed configurations, the clip arms cooperating with the capsule to provide a first user feedback indicating a decision configuration of a clip assembly;
a tension member coupled to the clip arms, the tension member biasing the clip arms toward the open configuration;
a yoke slidably received within the capsule, the yoke including distal and proximal portions releasably connected to one another via a first control wire, a distal end of the distal portion being coupled to proximal ends of the clip arms; and
a second control wire extending distally from a handle assembly to couple to the proximal portion of the yoke, distal movement of the second control wire within the elongated member moving the clip assembly distally relative to the capsule moving the clip arms to the open configuration, proximal movement of the control wire drawing the clip arms into the capsule to the closed configuration.

16. The apparatus according to claim 15 , wherein a proximal end of the first control wire includes a ball connector rotatably received in the proximal portion of the yoke, the ball connector being detachable from a remaining length of the first control wire to provide a second user feedback indicating separation of the clip assembly from the shaft.

17. The apparatus according to claim 16 , wherein the proximal portion of the yoke includes a ball cavity accommodating the ball connector of the first control wire.

18. The apparatus according to claim 16 , wherein proximal movement of the second control wire beyond a point at which the clip assembly is in the decision configuration results in separation of the yoke from the tension member.

Assignees

• Wells Brian Keith
• Wolf Lance Alan
• Furnish Gregory R
• Abramov Vasiliy P
• Mers Kelly William C
• Durgin Russell F
• Durgin Theresa A
• Jordan Gary A
• Kidder Allison
• Boston Scient Scimed Inc

Inventors

• Wells Brian Keith
• Wolf Lance Alan
• Furnish Gregory R
• Abramov Vasiliy P
• Mers Kelly William C
• Durgin Russell F
• Jordan Gary A
• Kidder Allison

Classifications

• A61B17/08

  Wound clamps {or clips, i.e. not or only partly penetrating the tissue (suture bridges A61B17/0466); Devices for bringing together the edges of a wound} · CPC title

• A61B17/083 Primary

  Clips, e.g. resilient · CPC title

• A61B17/10

  for applying or removing wound clamps {, e.g. containing only one clamp or staple (A61B17/076 takes precedence; containing multiple wound clamps A61B17/068)}; Wound clamp magazines · CPC title