Through the scope tension member release clip

Patent metadata

Field	Value
Publication number	US-9980725-B2
Application number	US-201615159512-A
Country	US
Kind code	B2
Filing date	May 19, 2016
Priority date	Sep 30, 2003
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

A hemostatic clip assembly for mounting on a delivery device comprises a capsule and a clip slidably mounted within the capsule so that, when the clip is drawn proximally into the capsule, arms of the clip are drawn together to a closed position, an abutting surface of at least one of the arms contacting a corresponding surface of the capsule when the clip is drawn to a predetermined position within the capsule to provide a first user feedback indicating closure of the clip in combination with a tension member connected to the clip arms and biasing the clip arms toward an open, tissue receiving configuration and a yoke slidably received within the capsule and releasably coupled to the tension member, the yoke including a ball cavity for receiving a ball connector of a control element of the delivery device to maintain the clip assembly coupled to the delivery device, wherein the control element is frangible to detach the yoke from the delivery device and to provide a second user feedback and, wherein release of the yoke from the tension member provides a third user feedback.

First claim

The invention claimed is:

1. An apparatus for applying clips to tissue, comprising:
a flexible sheath extending from a proximal end which, in an operative configuration, extends into a living body to a target portion of tissue to be clipped;
a capsule comprising a proximal end and a distal end;
a clip assembly provided in the capsule and configured to be operably movable between a closed configuration in which first and second arms of the clip assembly are drawn toward one another and an expanded configuration in which the first and second arms are separated from one another to receive target tissue therebetween; and
a control member a distal end of which is releasably coupled to the clip assembly via a separable yoke to transmit to the clip assembly forces applied thereto to move the clip assembly between the closed and expanded configurations;
wherein the separable yoke includes first and second yoke arms extending distally from the control member on opposite sides of the clip assembly and the clip assembly includes a connecting member extending between the first and second yoke arms coupling the yoke to the clip assembly, the first and second yoke arms being configured to be separated from the connecting member when subjected to a predetermined force by the control member to uncouple the control member from the clip assembly.

2. The apparatus of claim 1 , further comprising a bushing coupled between the flexible sheath and the capsule, the bushing being releasably coupled to the proximal end of the capsule and being fixed to the distal end of the flexible sheath.

3. The apparatus of claim 2 , wherein the flexible sheath is formed as a wire coil and the bushing is a substantially cylindrical member extending distally therefrom with a distal portion of the bushing being received within the capsule.

4. The apparatus of claim 1 , wherein the control member includes an increased diameter portion at a distal end thereof, the increased diameter portion being coupled to the separable yoke.

5. The apparatus of claim 4 , wherein the increased diameter portion at the distal end of the control wire is immovably fixed to a portion of the control wire extending proximally therefrom.

6. The apparatus of claim 1 , wherein the first and second yoke arms extend distally past proximal ends of the first and second arms of the clip assembly.

7. The apparatus of claim 6 , wherein the distal ends of each of the first and second yoke arms include a portion that hooks around a distal portion of the connecting member to connect the connecting member to the control member.

8. The apparatus of claim 1 , wherein a proximal end of the first arm of the clip assembly includes a projection positioned to mechanically lock with a locking feature of the capsule when the clip assembly is deployed to lock the clip assembly in the closed configuration.

9. The apparatus of claim 8 , wherein the projection at the proximal end of the first arm of the clip assembly is formed as a hook that mechanically interacts with the locking feature of the capsule to prevent the clip assembly from moving distally relative to the capsule.

10. The apparatus of claim 8 , wherein a proximal end of the second arm of the clip assembly includes a projection positioned to mechanically lock with a locking feature of the capsule when the clip assembly is deployed to lock the first and second arms of the clip assembly in the closed configuration.

11. The apparatus of claim 1 , wherein the clip assembly is configured so that, as the clip assembly is moved distally relative to the capsule, the first and second arms of the clip assembly are moved to the expanded configuration as the first and second arms of the clip assembly project further distally from the capsule and the first and second arms of the clip assembly are drawn into the closed configuration as the clip assembly is withdrawn proximally into the capsule.

12. An apparatus for applying clips to tissue, comprising:
a capsule defining a lumen therein and including openings in proximal and distal ends thereof;
a clip assembly received within the lumen of the capsule for movement between a closed configuration in which first and second arms of the clip assembly are drawn toward one another and an expanded configuration in which the first and second arms are separated from one another to receive target tissue therebetween;
a control member a distal end of which is releasably coupled to the clip assembly to transmit to the clip assembly forces applied to a proximal end of the control member to move the clip assembly between the closed and expanded configurations by moving the first and second arms of the clip assembly distally out of and proximally into the capsule; and
a separable yoke connecting the control member to the clip assembly, the yoke including first and second yoke arms extending distally from the control member within the capsule on opposite sides of the clip assembly, the clip assembly including a connecting member extending between the first and second yoke arms coupling the yoke to the clip assembly, the first and second yoke arms being configured to be separated from the connecting member when subjected to a predetermined force by the control member to uncouple the control member from the clip assembly.

13. The apparatus of claim 12 , further comprising a flexible sheath extending from a proximal portion to a distal end coupled to the capsule, the flexible sheath enclosing the control member therein.

14. The apparatus of claim 13 , further comprising a bushing coupled between a distal end of the flexible sheath and a proximal end of the capsule, the bushing being releasably coupled to the capsule and fixed to the flexible sheath.

Assignees

• Boston Scient Scimed Inc
• Durgin Theresa A

Inventors

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

Classifications

• A61B2017/12004

  for haemostasis, for prevention of bleeding · CPC title

• A61B2017/003

  Steerable · CPC title

• A61B17/1227

  Spring clips · CPC title

• A61B2090/037

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

• A61B2034/715

  Cable tensioning mechanisms for removing slack · CPC title