Bushing arm deformation mechanism

Patent metadata

Field	Value
Publication number	US-10722237-B2
Application number	US-201816000400-A
Country	US
Kind code	B2
Filing date	Jun 5, 2018
Priority date	May 9, 2012
Publication date	Jul 28, 2020
Grant date	Jul 28, 2020

Abstract

A medical device includes (a) a capsule including a lumen extending therethrough, a proximal end of the capsule including at least one window extending therethrough; (b) a bushing including a channel extending therethrough, a distal end including at least one arm extending distally therefrom such that a corresponding one of the arms is releasably engagable with a corresponding one of the windows; and (c) a core member including a locking portion and at least one engaging element. The locking portion is sized and shaped to be received within the channel of the bushing to apply a pressure to the arm such that the arm engages the windows. The engaging element extends laterally outward from a portion of the core member such that the engaging element engages a corresponding one of the arms to deform the arms radially inward and out of engagement with the windows.

First claim

What is claimed is:

1. A method, comprising:
providing a distal portion of a tissue clipping device through a body lumen to a target area, the distal portion of the tissue clipping device including a capsule extending longitudinally from a proximal end to a distal end and including a lumen extending therethrough, the distal portion of the tissue clipping device coupled to a proximal portion of the tissue clipping device via a hushing extending distally from the proximal portion of the tissue clipping device, and including an arm releasably engaging a window extending through a wall of the capsule at the proximal end thereof;
moving clip arms relative to the capsule between an open tissue receiving configuration and a closed tissue gripping configuration by moving a core member longitudinally relative to the capsule, the core member movably housed, within the lumen of the capsule and engaging proximal ends of each of the clip arms, a locking portion of the core member received within the bushing and applying, a radially outward pressure to the arm thereof to maintain engagement between the arm of the hushing and the window of the capsule; and
drawing the core member proximally relative to the capsule until an engaging element extending laterally outward from a portion of the core member distal of the locking portion engages the arm, deforming the arm radially inward out of engagement with the window of the capsule to release the capsule from the bushing.

2. The method of claim 1 , further comprising deploying the distal, portion of the tissue clipping device by moving the core member farther proximally relative to the capsule until a proximal portion of the core member, including the locking portion and the engaging element, is released from a distal portion of the core member to release the distal portion of the tissue clipping device from the proximal portion of the tissue clipping device.

3. The method of claim 1 , wherein moving the clip arms toward the open tissue receiving configuration includes moving the core member distally relative to the capsule so that the clip arms revert toward their biased open configuration.

4. The method of claim 1 , wherein moving the clip arms toward the closed tissue gripping configuration includes moving the core member proximally relative to the capsule so that the clip arms are constrained via a surface of the lumen of the capsule and distal ends of the clip arms are moved toward one another.

5. The method of claim 1 , wherein the engaging element is received within a corresponding opening extending through the arm of the bushing to engage and, deform the arm.

6. The method of claim 1 , wherein the engaging element is treated with a material having adhesive properties to adhere to the arm.

7. The method of claim 6 , wherein the material is one of an adhesive and a polymer.

8. The method of claim 1 , wherein the engaging element is sized and shaped to interlock with the arm of the bushing.

9. The method of claim 8 , wherein the engaging element includes a concave surface for engaging the arm of the hushing, the arm of the bushing being convexly shaped.

10. A method, comprising:
providing a distal portion of a medical device through a body lumen to a target area, the distal portion of the medical device including a capsule extending longitudinally from a proximal end to a distal end and including a lumen extending therethrough, the distal portion of the medical device coupled to a proximal portion of the medical device via a bushing extending distally from the proximal portion of the medical device and including an arm engaging a window extending through a wall of the capsule at the proximal end thereof; and
deploying the distal portion of the medical device by moving a core member from a first position, in which a locking portion of the core member is received within the bushing so to apply a radially outward pressure to the arm of the bushing to maintain an engagement between the arm of the bushing and the window of the capsule, to a second position, in which an engaging element extending laterally outward from a portion of the core member distal of the locking portion engages the arm of the bushing to deform the arm radially inward, out of engagement with the window of the capsule.

11. The method of claim 10 , wherein deploying the distal portion of the medical device includes moving the core member farther proximally relative to the capsule until a proximal portion of the core member, including the locking portion and the engaging element, is released from a distal portion of the core member to release the distal portion of the medical device from the proximal portion of the medical device.

12. The method of claim 10 , wherein the distal portion of the medical device includes clip arms movable between an open configuration and a closed configuration, proximal ends of the clip arms slidably received within the capsule and movable relative thereto via the core member.

13. The method of claim 10 , wherein, in the second position, the engaging element is received within a corresponding opening extending through the arm of the bushing to engage and deform the arm.

14. The method of claim 10 , wherein the engaging element is treated with a material having adhesive properties to adhere to the arm.

15. The method of claim 14 , wherein the material is one of an adhesive and a polymer.

16. The method of claim 10 , wherein, in the second position, the engaging, element interlocks with the arm of the bushing.

17. The method of claim 16 , wherein the engaging element includes a concave surface interlocking with the arm of the bushing, the arm of the bushing being convexly shaped.

Assignees

• Boston Scient Scimed Inc

Inventors

• Barner Paul
• Christakis Laura
• Mcgreevy Craig

Classifications

• A61B17/122 Primary

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

• A61B2017/00951

  adhesive · CPC title

• A61B2090/037

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

• B66C1/42

  Gripping members engaging only the external or internal surfaces of the articles (for handling or stripping castings or ingots during manufacture B22D29/00) · CPC title

• A61B2090/034

  abutting on parts of the device itself · CPC title