Stent

Patent metadata

Field	Value
Publication number	US-2018153718-A1
Application number	US-201715820615-A
Country	US
Kind code	A1
Filing date	Nov 22, 2017
Priority date	Jan 14, 2011
Publication date	Jun 7, 2018
Grant date	—

Abstract

The invention relates to a medical device and a method of using it. The device is a stent which can be percutaneously deliverable with (or on) an endovascular catheter or via other surgical or other techniques and then expanded. The stent is configured to have a central portion defined by “open” cells and at least two end portions, defined by “closed” cells, spaced apart and directly connected to the distal and proximal ends of the central portion of the stent. The stent may also optionally have a covering or a lattice with openings.

First claim

1 . (canceled)

2 . A stent having a distal end and a proximal end and a longitudinal axis, the stent comprising:
a first circumferential row arranged near the proximal end and extending substantially perpendicular to the longitudinal axis; a second circumferential row arranged near the distal end and extending substantially perpendicular to the longitudinal axis; a plurality of struts configured to longitudinally stabilize the stent; and an intermediate section extending at an angle relative to the longitudinal axis and being axially interposed between and directly connected to the first circumferential row and the second circumferential row, the intermediate section having uniform apex angles and uniform apex amplitude along a length thereof to form a uniform apex geometry.

3 . The stent of claim 2 , wherein the intermediate section is a continuous series of undulations having a series of helical turns about the longitudinal axis forming one of a substantially cylindrical helical element and a tapered tubular helical element.

4 . The stent of claim 3 , wherein the plurality of struts including an intermediate group of struts arranged intermittently within the intermediate section of the stent to connect the helical turns.

5 . The stent of claim 4 , wherein the intermediate group of struts include between two and six connectors for each of the series of helical turns, and the intermediate group of struts connect adjacent rows of the series of helical turns.

6 . The stent of claim 5 , wherein the intermediate group of struts in a first helical row are offset from the intermediate group of struts in a second helical row, wherein the first helical row is adjacent the second helical row.

7 . The stent of claim 2 , wherein the plurality of struts includes a proximal group of struts directly connecting the first circumferential row to the intermediate section and a distal group of struts directly connecting the second circumferential row to the intermediate section.

8 . The stent of claim 7 , wherein lengths of the proximal group of struts increase along a first circumferential direction of the stent, and lengths of the distal group of struts increase along a second circumferential direction of the stent, wherein the first circumferential direction is opposite the second circumferential direction.

9 . The stent of claim 7 , wherein at least one of the proximal group of struts and the distal group of struts includes a notch configured to act as a hinge to facilitate bending and reduce stress around an area where the stent is deformed.

10 . The stent of claim 7 , further comprising a first circumferential ring including a plurality of closed cells directly connected to the first circumferential row and a second circumferential ring including a plurality of closed cells directly connected to the second circumferential row.

11 . The stent of claim 2 , wherein the stent includes an insertion configuration and a deployed configuration, and the stent is configured to maintain a length that is relatively constant as the stent transforms from the insertion configuration to the deployed configuration.

12 . A stent having an insertion configuration and a deployed configuration, the stent comprising:
a cylindrical body configured to maintain a length that is substantially constant as the stent transforms from the insertion configuration to the deployed configuration and formed by a continuous series of rows including:
a proximal end row arranged near extending substantially perpendicular to a longitudinal axis of the cylindrical body;
a distal end row arranged extending substantially perpendicular to the longitudinal axis of the cylindrical body; and
intermediate rows extending helically about the longitudinal axis of the cylindrical body and being axially interposed between and directly connected to the first circumferential row and the second circumferential row, the intermediate rows having uniform apex angles and uniform apex amplitude along a length thereof.

13 . The stent of claim 12 , wherein the continuous series of rows includes undulations formed by struts interconnected at bends or apices.

14 . The stent of claim 13 , wherein the intermediate rows have a greater flexibility than at least one of the proximal end row and the distal end row.

15 . The stent of claim 14 , further comprising a plurality of struts connecting the bends or apices of the continuous series of rows, and each of the apices or bends of at least one of the proximal end row and the distal end row is directly connected to the apices or bends of the intermediate rows, and the apices of the intermediate rows are intermittently connected by the plurality of struts.

16 . The stent of claim 12 , further comprising a lattice coupled to the cylindrical body and configured to minimize or reduce the risk of introduction of emboli into a bloodstream, resist tissue encroachment into a lumen defined by the cylindrical body, and reduce pressure on a weakened part of a blood vessel to reduce the risk of vessel rupture.

17 . The stent of claim 16 , wherein the lattice includes openings having a series of continuous longitudinal segments that extend in a direction that is substantially parallel to the longitudinal axis of the cylindrical body.

18 . A stent delivery system comprising:
a handle housing; and an sheath configured to maintain a stent in an insertion configuration and release the stent to a deployed configuration, the stent including: a cylindrical body configured to maintain a length that is substantially constant as the stent transforms from the insertion configuration to the deployed configuration and formed by a continuous series of rows including:
a proximal end row arranged near extending substantially perpendicular to a longitudinal axis of the cylindrical body;
a distal end row arranged extending substantially perpendicular to the longitudinal axis of the cylindrical body; and
intermediate rows extending helically about the longitudinal axis of the cylindrical body and being axially interposed between and directly connected to the first circumferential row and the second circumferential row, the intermediate rows having uniform apex angles and uniform apex amplitude along a length thereof.

19 . The stent delivery system of claim 18 , wherein the sheath is configured to deliver the stent to a carotid artery of a patient.

20 . The stent delivery system of claim 19 , wherein the stent is configured to conform to vessel walls of the carotid artery.

21 . The stent delivery system of claim 18 , further comprising a thumb wheel arranged within the handle housing configured to retract the sheath to deploy the stent.

Assignees

• Gore & Ass

Inventors

• Armstrong Joseph R
• Cully Edward H
• Franklin Michael W
• Hansen Mark Y
• Lurie Brandon A
• Mcmurray Craig R
• Montgomery William D
• Terry Wendy J
• Tittelbaugh Eric M

Classifications

• A61F2002/91558

  connected peak to peak · CPC title

• A61F2/915

  with bands having a meander structure, adjacent bands being connected to each other · CPC title

• A61F2002/075

  the stent being loosely attached to the graft material, e.g. by stitching · CPC title

• A61F2002/91575

  connected peak to trough · CPC title

• A61F2/88 Primary

  the wire-like elements formed as helical or spiral coils · CPC title