Retrieval devices and related methods of use

Patent metadata

Field	Value
Publication number	US-2020060701-A1
Application number	US-201916665433-A
Country	US
Kind code	A1
Filing date	Oct 28, 2019
Priority date	Sep 8, 2014
Publication date	Feb 27, 2020
Grant date	—

Abstract

According to aspects of the present disclosure, a retrieval device may include a sheath, a first drive member in the sheath, and a second drive member in the sheath. The second drive member may be movable relative to the first drive member. An end effector may be retractable into and extendable out of the sheath. The end effector may include a first proximal end portion coupled to the first drive member, a second proximal end portion coupled to the second drive member, and a plurality of legs extending distally from the first and second proximal end portions to a distal tip of the end effector. All of the legs that extend to the distal tip may be fixed together at the distal tip.

First claim

We claim:

1 . A retrieval device, comprising:
a sheath; a first drive member in the sheath; a second drive member in the sheath, the second drive member being movable relative to the first drive member; and an end effector retractable into and extendable out of the sheath, the end effector comprising:
a first proximal end portion coupled to the first drive member,
a second proximal end portion coupled to the second drive member, and
a plurality of legs extending distally from the first and second proximal end portions to a distal tip of the end effector, wherein all of the legs that extend to the distal tip are fixed together at the distal tip.

2 . The retrieval device of claim 1 , wherein the retrieval device comprises more than two drive members.

3 . The retrieval device of claim 1 , wherein one of the first and second drive members is movable in at least one of a proximal direction and a distal direction relative to the other of the first and second drive members.

4 . The retrieval device of claim 1 , wherein one of the first and second drive members is movable in at least one of a proximal direction and a distal direction while the other of the first and second drive members does not move in the proximal direction or the distal direction.

5 . The retrieval device of claim 1 , wherein one of the first and second drive members is movable in a proximal direction while the other of the first and second drive members moves in a distal direction.

6 . The retrieval device of claim 1 , wherein the first and second drive members are simultaneously movable in at least one of a proximal direction and a distal direction.

7 . The retrieval device of claim 1 , wherein the distal tip includes a coupler configured to receive the distal ends of the legs.

8 . The retrieval device of claim 1 , wherein a greater number of legs extend between the coupler and the first end portion than between the coupler and the second end portion.

9 . The retrieval device of claim 1 , wherein the distal tip is movable to a position proximal of at least a portion of the end effector when one of the first drive member and the second drive member is pulled proximally relative to the other of the first and second drive members.

10 . A retrieval device, comprising:
a sheath; a drive member assembly comprising:
a first drive member in the sheath, and
a second drive member in the sheath, the first drive member being movable relative to the second drive member; and
an end effector coupled to the first and second drive members, the end effector comprising a plurality of legs, the drive member assembly and the plurality of legs forming a loop, wherein one of the first and second drive members is configured to form a distal portion of the loop, the distal portion being extendable out of the sheath while the plurality of legs are contained in the sheath.

11 . The retrieval device of claim 10 , wherein the first and second drive members and the end effector form a continuous loop.

12 . The retrieval device of claim 10 , wherein the drive member assembly comprises an actuator coupled to the first and second drive members.

13 . The retrieval device of claim 12 , wherein the actuator is configured to rotate to move one of the first and second drive members relative to the other of the first and second drive members.

14 . The retrieval device of claim 10 , wherein moving the first drive member relative to the second drive member extends the end effector out of the sheath.

15 . The retrieval device of claim 12 , wherein the actuator is configured to move in one of a proximal direction and a distal direction to move the first and second drive members in the same direction.

16 . A method of manipulating material, comprising:
deploying an end effector from a distal end of a sheath, the end effector comprising:
a first end portion coupled to a first drive member extending through the sheath,
a second end portion coupled to a second drive member extending through the sheath, and
an intermediate portion connected between the first and second end portions, the intermediate portion comprising a plurality of legs forming a distal end of the deployed end effector;
maneuvering the deployed end effector around material, wherein maneuvering comprises moving one of the first and second drive members relative to the other of the first and second drive members to move the distal end of the deployed end effector proximal to at least one of the legs.

17 . The method of claim 16 , wherein distal ends of the legs are joined by a coupler, the coupler forming a distal tip of the deployed end effector, and moving one of the first and second drive members relative to the other of the first and second drive members moves the coupler proximal to at least one of the legs.

18 . The method of claim 16 , further including exerting a compressive holding force on the material with the plurality of legs.

19 . The method of claim 16 , wherein the end effector includes a first area with adjacent legs spaced apart by a first distance, and a second area with adjacent legs spaced apart by a second distance greater than the first distance.

20 . The method of claim 16 , wherein moving one of the first and second drive members relative to the other of the first and second drive members moves the first area distally and the second area proximally.

Assignees

• Boston Scient Scimed Inc

Inventors

• Nguyen Man M
• Raybin Samuel
• Bianchi Tom

Classifications

• A61B17/221 Primary

  Gripping devices in the form of loops or baskets {for gripping calculi or similar types of obstructions (surgical snare instruments A61B17/32056)} · CPC title

• A61B2017/2212

  having a closed distal end, e.g. a loop · CPC title

• A61B17/50

  Instruments {, other than pincettes or toothpicks,} for removing foreign bodies from the human body (surgical pincettes, i.e. surgical tweezers, A61B17/30) · CPC title