Elastic Introducer Sheath

• US 20140236123A1
• Filed: 04/24/2014
• Published: 08/21/2014
• Est. Priority Date: 10/26/2012
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Birmingham, Evelyn, Duffy, Niall, Griffin, Patrick, Macaulay, Patrick, Peter, Stephen J., Elmouelhi, Ahmed M., Milroy, John
• Granted Patent: US 9,907,931 B2
• Time in Patent Office: Days
• US Class Current: 604/525
• CPC Class Codes: A61M 2025/0024 Expandable catheters or sheaths
• CPC Class Codes: A61M 2025/0687 having means for atraumatic insertion in the body or protection of the tip of the sheath during insertion, e.g. special designs of dilators, needles or sheaths
• CPC Class Codes: A61M 2207/00 Methods of manufacture, assembly or production
• CPC Class Codes: A61M 25/0012 with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils
• CPC Class Codes: A61M 25/0023 by the form of the lumen, e.g. cross-section, variable diameter
• CPC Class Codes: A61M 25/005 with embedded materials for reinforcement, e.g. wires, coils, braids
• CPC Class Codes: A61M 25/0053 having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid
• CPC Class Codes: A61M 25/0662 Guide tubes
• CPC Class Codes: A61M 39/0247 Semi-permanent or permanent transcutaneous or percutaneous access sites to the inside of the body peritoneal dialysis catheters A61M1/285; tracheostomy devices A61M16/0465; measuring pressure within the body A61B5/03; colostomy devices A61F5/445; gastrotomy feeding tubes A61J15/0015; means for fixing a feeding tube outside of the body A61J15/0053
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

An elastic percutaneous elastic introducer sheath is disclosed which can locally expand and reduce to accommodate a transcatheter medical device. The elastic introducer sheath includes a non-circumferentially continuous elastic frame, a liner, and a jacket.

Claims

1. An elastic surgical access device comprising:

a circumferentially continuous biocompatible material layer;

an elastic frame; and

a non-circumferentially continuous biocompatible material layer connected to the elastic frame and to the circumferentially continuous biocompatible material layer, the non-circumferentially continuous biocompatible material layer having a longitudinal gap in an expanded configuration.

2. The elastic surgical access device of claim 1, wherein the elastic flat wire structure is curved to form a C-shape in the radial direction.

3. The elastic surgical access device of claim 1, wherein the elastic flat wire structure has a rectangular cross section.

4. The elastic surgical access device of claim 1, wherein the elastic flat wire structure extends along a length of the access device.

5. The elastic surgical access device of claim 4, the elastic frame includes a spine and a projection extending from the spine.

6. The elastic surgical access device of claim 5, wherein the projection is curved to form a C-shape in the radial direction.

7. The elastic surgical access device of claim 5, wherein the spine and the projection have a rectangular cross section.

8. The elastic surgical access device of claim 5, further comprising a plurality of projections extending from the spine, the plurality of projections being spaced longitudinally along the length of the access device.

9. The elastic surgical access device of claim 8, wherein the plurality of projections are curved to form a C-shape in the radial direction.

10. The elastic surgical access device of claim 5, further comprising a second projection configured to engage the projection to limit the expansion of the access device.

11. The elastic surgical access device of claim 1, wherein the elastic frame has a non-uniform geometry along its length.

12. The elastic surgical access device of claim 11, wherein the thickness of the elastic frame varies along its length.

13. The elastic surgical access device of claim 11, wherein the width of the elastic frame varies along its length.

14. The elastic surgical access device of claim 4, wherein the stiffness of the elastic frame varies along the length of the access device.

15. The elastic surgical access device of claim 1, further comprising a plurality of non-circumferentially continuous elastic frames, wherein the plurality of elastic frames are longitudinally spaced along the access device.

16. The elastic surgical access device of claim 1, wherein the non-circumferentially continuous biocompatible material layer includes a second longitudinal gap in the expanded configuration.

17. A locally expandable surgical access device comprising:

a non-circumferentially continuous biocompatible material layer including a longitudinal gap along a length of the access device;

a circumferentially continuous biocompatible material layer connected to the non-circumferentially continuous biocompatible material layer; and

an elastic frame extending across the longitudinal gap connected to the non-circumferentially continuous biocompatible material layer.

18. The locally expandable surgical access device of claim 17, wherein the longitudinal gap extends between a first radial edge of the non-circumferentially continuous biocompatible material layer and a second radial edge of the non-circumferentially continuous biocompatible material layer in an expanded configuration of the access device,

wherein a first portion of the elastic frame is attached to the first radial edge, and

wherein a second portion of the elastic frame is attached to the second radial edge.

19. The locally expandable surgical access device of claim 18, wherein the elastic frame is configured to maintain the access device in a collapsed configuration, and

wherein the elastic frame is configured to permit expansion of the access device from the collapsed configuration to the expanded configuration.

20. A method for manufacturing an elastic surgical access device, comprising:

providing an elastic material sheet;

cutting an elastic frame from the elastic material sheet;

attaching a non-circumferentially continuous biocompatible material layer to the elastic frame; and

attaching a circumferentially continuous biocompatible material layer to the non-circumferentially continuous biocompatible material later.