Medical device delivery devices, systems, and methods

Patent metadata

Field	Value
Publication number	US-12458518-B2
Application number	US-202117249010-A
Country	US
Kind code	B2
Filing date	Feb 17, 2021
Priority date	Feb 17, 2021
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

Medical device delivery devices, systems, and methods are disclosed herein. According to some embodiments, a medical device delivery system includes a core member and a coupling assembly positioned about the core member. The coupling assembly may include an engagement member having projections configured to engage a medical device and a release member that is movable between a compressed configuration and an expanded configuration. A medical device can extend along the core member such that, when the release member is in the compressed configuration, the projections of the engagement member engage the medical device and when the release member is in the expanded configuration, the release member prevents the projections from engaging the medical device and/or facilitates expansion of the medical device.

First claim

We claim:

1 . A medical device delivery system comprising:
a core member configured for advancement within a corporeal lumen; and a coupling assembly positioned about the core member, the coupling assembly comprising: an engagement member positioned about the core member, the engagement member including an outer portion having one or more projections separated by recesses along a circumferential direction, wherein the projections define an outer diameter of the engagement member and are configured to extend into pores of an overlying medical device; and a disc-shaped resilient member positioned about the core member, wherein the resilient member is movable between a first state in which an outer diameter of the resilient member is smaller than the outer diameter of the engagement member and a second state in which the outer diameter of the resilient member is greater than the outer diameter of the engagement member, such that in the second state the resilient member physically blocks the projections of the engagement member from extending into the pores of the overlying medical device.

2 . The system of claim 1 , further comprising a tubular stent having a substantially cylindrical inner wall and extending along the core member such that, when the resilient member is in the first state, the projections of the engagement member extend into one or more pores of the stent along the inner wall and, when the resilient member is in the second state, the resilient member prevents the projections from extending into the one or more pores of the stent along the inner wall.

3 . The system of claim 1 , further comprising an elongate tube defining a lumen therethrough, wherein the coupling assembly is configured to be positioned within the lumen of the elongate tube such that the resilient member assumes the first state.

4 . The system of claim 3 , wherein the coupling assembly is configured to be advanced through the lumen of the elongate tube such that the resilient member assumes the second state after exiting the lumen.

5 . The system of claim 1 , wherein the resilient member is positioned adjacent to and proximal of the engagement member.

6 . The system of claim 1 , wherein the resilient member abuts the engagement member.

7 . The system of claim 1 , wherein the engagement member is a first engagement member and the resilient member is a first resilient member, the coupling assembly further comprising a second engagement member positioned about the core member and a second resilient member positioned about the core member.

8 . The system of claim 7 , wherein the first resilient member is positioned proximally of the first engagement member and the second resilient member is positioned proximally of the second engagement member.

9 . The system of claim 1 , wherein the resilient member comprises an elastomeric material with a Shore A hardness of at least 20.

10 . The system of claim 1 , wherein the outer diameter of the engagement member is greater than a thickness of the engagement member.

11 . A medical device delivery system comprising:
a core member configured for advancement through a lumen of an elongate tube; a coupling assembly positioned about the core member, the coupling assembly comprising: an engagement member positioned about the core member, the engagement member including an outer surface having one or more projections; and a release member positioned about the core member adjacent to the engagement member; and a tubular medical device having a substantially cylindrical inner surface and extending along the core member over the coupling assembly, the medical device having pores, wherein the medical device and the coupling assembly are configured to be positioned within a lumen of an elongate tube such that the release member is compressed and contacts the inner surface of the medical device about a circumference of the medical device and the one or more projections extend through one or more pores of the medical device along the inner surface, and wherein the core member is configured to be distally advanced within the lumen of the elongate tube such that, when the release member and the engagement member are positioned out of the lumen of the elongate tube, the release member and at least a portion of the medical device radially expand, and wherein upon said radial expansion the outer diameter of the release member is greater than an outer diameter of the engagement member, and the release member thereby physically blocks the one or more projections from extending into the one or more pores of the medical device.

12 . The system of claim 11 , wherein, when the release member radially expands, the release member applies a radial force to the medical device to separate the medical device from the one or more projections.

13 . The system of claim 11 , wherein, when the release member is compressed, an outer diameter of the release member is smaller than an outer diameter of the engagement member.

14 . The system of claim 11 , wherein the release member comprises a resilient material.

15 . The system of claim 11 , wherein the outer diameter of the engagement member is greater than a thickness of the engagement member.

16 . A medical device delivery system comprising:
a core member; and a coupling assembly carried by the core member, the coupling assembly comprising: an engagement member positioned about the core member, the engagement member including an outer surface having one or more projections configured to extend into pores of a medical device extending along the core member; and a disc-shaped expandable element located on the core member at a position longitudinally adjacent to the engagement member, the expandable element having a compressed configuration and an expanded configuration, wherein, when the expandable element is in the compressed configuration, the one or more projections extend into the pores of the medical device, and wherein expansion of the expandable element from the compressed configuration to the expanded configuration causes the disc-shaped expandable element to physically block the one or more projections from extending into the pores of the medical device, thereby causing the medical device to disengage from the projections, wherein, when the expandable element is in the compressed configuration, a largest radial dimension of the expandable element is smaller than a largest radial dimension of the engagement member and, when the expandable element is in the expanded configuration, the largest radial dimension of the expandable element is greater than the largest radial dimension of the engagement member.

17 . The system of claim 16 , wherein expansion of the expandable element causes the expandable element to apply a radially outwardly directed force to the medical device to cause the medical device to disengage from the projections.

18 . The system of claim 16 , further comprising an elongate tube having a lumen configured to receive the core member, the medical device, and the coupling assembly therethrough.

19 . The system of claim 18 , wherein, when the expandable element is positioned within the lumen of the elongate tube, the expandable element assumes the compressed configuration and, when the expandable element is advanced out of the lumen of the elongate tube, the expandable element assumes the expanded configuration.

20 . The system of claim 16 , wherein the expandable element comprises an elastomeric disc.

Assignees

• Covidien Lp

Inventors

• Ashby Mark
• Zeng Danyong
• Barooni Agee
• Vu Khoa Dang
• Nageswaran Ashok

Classifications

• A61F2002/9505

  having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument · CPC title

• A61F2002/9665

  with additional retaining means · CPC title

• A61F2/95 Primary

  Instruments specially adapted for placement or removal of stents or stent-grafts · CPC title

• A61F2/966 Primary

  with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod · CPC title

• A61F2230/0069

  cylindrical · CPC title