Hemostasis clip with collapsible capsule

Patent metadata

Field	Value
Publication number	US-12262883-B2
Application number	US-202318510296-A
Country	US
Kind code	B2
Filing date	Nov 15, 2023
Priority date	May 28, 2019
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

A clipping device includes a capsule including a longitudinal body and a cap mounted over a distal end thereof so that the cap is movable relative to the longitudinal body from a pre-deployed configuration to a deployed configuration in which the cap, is moved proximally relative to the longitudinal body to reduce a length of the capsule. A channel of the cap and a channel of the capsule are substantially aligned with respect to one another. At least proximal portions of a pair of clip arms are received within the channels of the cap and the longitudinal body so that the clip arms are movable relative to the capsule between an open configuration, in which distal ends of the clip arms are separated from one another, and a closed configuration, in which the distal ends of the clip arms are drawn toward one another.

First claim

What is claimed is:

1. A device for treating a target tissue, comprising:
a clip including a capsule extending longitudinally from a proximal end to a distal end and including a channel extending therethrough, proximal ends of a pair of clip arms slidably received within the channel so that the pair of clip arms are movable between an open configuration, in which distal ends thereof are separated from one another, and a closed configuration, in which the distal ends thereof are moved toward one another, the capsule further including a cap coupled to a distal end of a longitudinal body so that, when a predetermined force is exerted on the cap via engaging features of the clip arms, the cap is moved from a pre-deployed configuration to the deployed configuration, in which the cap is moved proximally relative to the longitudinal body to reduce a length of the capsule; and
a proximal portion configured to permit insertion of the clip through a working channel of an endoscope, the proximal portion including a flexible shaft extending from a proximal end to a distal end configured to be releasably coupled to the proximal end of the capsule and a control member extending through the flexible shaft to a distal end releasably coupled to the proximal ends of the clip arms so that moving the control member longitudinally relative to the flexible shaft moves the clip arms between the open and closed configurations.

2. The device of claim 1 , wherein a distal end of the cap includes a shoulder for abutting the distal end of the longitudinal body to prevent further proximal movement of the cap relative to the longitudinal body.

3. The device of claim 2 , wherein the shoulder engages the distal end of the longitudinal body, and the cap in the proximal-most position relative to the longitudinal body defines a minimum length of the capsule.

4. The device of claim 1 , wherein the clip arms are biased toward the open configuration so that the clip arms are constrained toward the closed configuration via an interior surface of one of the cap and the longitudinal body.

5. The device of claim 1 , wherein the cap is coupled to the longitudinal body via a shear pin configured to fail when the predetermined force is exerted thereon.

6. The device of claim 1 , wherein the cap is coupled to the longitudinal body via a pin extending from an interior surface thereof and through a slotted opening extending through a wall along a distal portion of the longitudinal body, the pin longitudinally slidable from a distal end of the slotted opening, in the pre-deployed configuration, to a proximal end of the slotted opening, in the deployed configuration.

7. The device of claim 6 , wherein the distal end of the slotted opening is sized and shaped to correspond to a size and shape of the pin, the distal and proximal ends of the slotted opening connected via a middle portion having a width smaller than the distal end of the slotted opening so that when the predetermined force is exerted on the cap to move the capsule from the pre-deployed configuration to the deployed configuration, one of the pin and the middle portion deform to permit the pin to be slid proximally along the slotted opening.

8. The device of claim 7 , wherein the pin is cylindrical and the width of the middle portion is smaller than a diameter of the pin.

9. The device of claim 1 , wherein a proximal portion of the longitudinal body includes locking windows extending through a wall thereof.

10. The device of claim 9 , wherein the proximal ends of the clip arms include locking tabs which are configured to engage the locking windows of the longitudinal body when the capsule is in the deployed configuration.

11. The device of claim 1 , wherein at least one of the clip arms includes an engaging feature configured to engage a portion of the cap so that, when a predetermined proximal force is exerted thereon, the capsule is moved from the pre-deployed configuration to the deployed configuration.

12. The device of claim 1 , wherein the flexible shaft comprises a bushing and a proximal end of the longitudinal body comprises tabs configured to be crimped radially inward to engage a portion of the bushing to releasably couple the distal end of the flexible shaft to the longitudinal body.

13. A device for treating a target tissue, comprising:
a clip including a capsule extending longitudinally from a proximal end to a distal end with proximal ends of a pair of clip arms slidably received within the capsule so that the clip arms are movable between an open configuration in which distal ends thereof are separated from one another, and a closed configuration, in which the distal ends thereof are moved toward one another, the capsule including a cap slidably coupled to a distal end of a longitudinal body so that, when a predetermined force is exerted on the cap via an engaging feature on at least one of the clip arms, the cap is moved proximally relative to the longitudinal body to reduce a length of the capsule; and
a proximal portion configured to permit insertion of the clip through a working channel of an endoscope, the proximal portion including a flexible shaft extending from a proximal end to a distal end configured to be releasably coupled to the proximal end of the capsule and a control member extending through the flexible shaft to a distal end releasably coupled to proximal ends of the clip arms so that moving the control member longitudinally relative to the flexible shaft moves the clip arms between the open and closed configurations.

14. The device of claim 13 , wherein a distal end of the cap includes a shoulder for abutting the distal end of the longitudinal body to define a maximum proximal movement of the cap relative to the longitudinal body.

15. The device of claim 14 , wherein the shoulder engages the distal end of the longitudinal body when the cap has moved to a proximal-most position relative to the longitudinal body, and wherein the cap in the proximal-most position defines a minimum length of the capsule.

16. The device of claim 13 , wherein the clip arms are biased toward the open configuration so that the clip arms are constrained toward the closed configuration via an interior surface of one of the cap and the longitudinal body as the clip arms are drawn into the capsule.

Assignees

• Boston Scient Scimed Inc

Inventors

• Congdon Daniel
• Lehtinen Laurie A
• Roberts Alex

Classifications

• A61B2017/00623

  Introducing or retrieving devices therefor · CPC title

• A61B2017/00584

  Clips · CPC title

• A61B2017/0034

  adapted to be inserted through a working channel of an endoscope · CPC title

• A61B17/00234

  for minimally invasive surgery (A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence) · CPC title

• A61B2017/00862

  elastic or resilient · CPC title