# US 2012/0083871 A1 · Soft crowns

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- Number: US 2012/0083871 A1
- Document ID: US20120083871A1
- Status: Published application
- Kind: A1
- Application number: 13/230,186
- Filed: 2011-09-12
- Published: 2012-04-05
- Earliest claimed: 2010-09-30
- Assignees: Cook Medical Technologies LLC
- Inventors: Michael Ryan
- Web page: https://patentgrep.com/patent/US20120083871A1

## CPC

- A61F 2/90: characterised by a net-like or mesh-like structure
- A61F 2/848: having means for fixation to the vessel wall, e.g. barbs
- A61F 2220/0008: Fixation appliances for connecting prostheses to the body
- A61F 2220/0016: with sharp anchoring protrusions, e.g. barbs, pins, spikes
- A61F 2230/0054: V-shaped
- A61F 2230/0078: hyperboloidal
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## Abstract

Soft crowns are provided for use in a medical device. Soft crowns may reduce the incidence of tissue perforations as a medical device engages a luminal wall. In certain embodiments, a soft crown may include a first strut and a second strut interconnected by an end portion. The end portion may include a third strut and a fourth strut that intersect to form a distal end of the soft crown. The first strut and the second strut may intersect other struts in the medical device to attach the crown thereto. The soft crown may bend or pivot about a plane defined by the intersections of the first strut and the second strut to the medical device.

## Claims

### Claim 1

A crown of an implantable medical device having a central longitudinal axis, the crown comprising:
a first strut having a first strut proximal end and a first strut distal end;
a second strut having a second strut proximal end and a second strut distal end; and
an end portion having a first proximal end, a second proximal end, and a distal end,
wherein the first strut distal end intersects the first proximal end, wherein the second strut distal end intersects the second proximal end,
wherein the first strut proximal end and the second strut proximal end define a plane oriented perpendicular to the central longitudinal axis, wherein the crown can bend or pivot about the plane independent of adjacent crowns.

### Claim 2 (depends on 1)

The crown of claim 1, wherein the end portion comprises a third strut and a fourth strut, wherein the third strut comprises the first proximal end and the fourth strut comprises the second proximal end, and wherein the third strut and the fourth strut intersect to form the distal end.

### Claim 3 (depends on 1)

The crown of claim 1, wherein the first strut crosses a fifth strut and intersects a sixth strut at the first strut proximal end, and wherein the second strut crosses a seventh strut and intersects an eighth strut at the second strut proximal end.

### Claim 4 (depends on 1)

The crown of claim 1, wherein the first and second struts are substantially parallel to each other.

### Claim 5 (depends on 1)

The crown of claim 1, wherein the first and second struts are aligned at an obtuse or acute angle relative to the central longitudinal axis.

### Claim 6 (depends on 1)

The crown of claim 1, wherein the first and second struts are substantially parallel to the central longitudinal axis.

### Claim 7 (depends on 1)

The crown of claim 1, wherein the crown is located at one of a proximal or distal end of a stent.

### Claim 8 (depends on 7)

The crown of claim 7, wherein the stent comprises a central portion and at least one flange, wherein the crown is located at a distal end of the flange.

### Claim 9 (depends on 1)

The crown of claim 1, wherein an intersection of the first strut and a third strut creates a first atraumatically shaped bend, wherein an intersection of the second strut and a fourth strut creates a second atraumatically shaped bend, and wherein an intersection of the third strut and the fourth strut creates a third atraumatically shaped bend.

### Claim 10 (depends on 1)

The crown of claim 1, wherein the first strut further comprises a first strut central portion located between the first strut proximal end and the first strut distal end, and wherein the first strut does not intersect or cross over or under other struts from adjacent crowns at the first strut central portion or the first strut distal end.

### Claim 11

A braided stent having a braided portion integral with a non-braided portion, the non-braided portion comprising a first strut and a second strut, wherein the first strut and the second strut intersect to form an apex, wherein the first strut is separated from the braided portion by a third strut interconnecting the first strut to the braided portion, and wherein the second strut is separated from the braided portion by a fourth strut interconnecting the second strut to the braided portion.

### Claim 12 (depends on 11)

The braided stent of claim 11, wherein the third and fourth struts are substantially parallel to each other.

### Claim 13 (depends on 11)

The braided stent of claim 11, wherein the stent has a central longitudinal axis, and wherein the third and fourth struts extend substantially parallel to the central longitudinal axis.

### Claim 14 (depends on 11)

The braided stent of claim 11, wherein the stent has a central longitudinal axis, and wherein the third and fourth struts extend at an angle acute or obtuse relative to the central longitudinal axis.

### Claim 15 (depends on 11)

The braided stent of claim 11, wherein the stent comprises a plurality of the non-braided portions arranged into a circumferential row circumscribing an end of the stent.

### Claim 16 (depends on 11)

The braided stent of claim 11, wherein the braided portion and the non-braided portion are covered with a membrane material.

### Claim 17 (depends on 11)

The braided stent of claim 11, wherein the stent comprises a central longitudinal axis, wherein the interconnections of the third and fourth struts to the braided portion define a radial plane oriented perpendicular to the central longitudinal axis, and wherein the third and fourth struts are pivotable about the radial plane in an abluminal direction or a luminal direction.

### Claim 18 (depends on 11)

The braided stent of claim 11, wherein the stent comprises a flange having a flange end comprising a non-braided portion.

### Claim 19

An expandable stent for implantation in a body lumen comprising a circumferential row of cells located at an end of the stent, each cell comprising:
a proximal end and a distal end;
a first strut and a second strut, wherein the first and second struts intersect to form the distal end;
a third strut that intersects the first strut and extends proximally therefrom;
a fourth strut that intersects the second strut and extends proximally therefrom;
a fifth strut that crosses over the third strut;
a sixth strut that crosses under the fourth strut, wherein the fifth strut and the sixth strut cross each other to form the proximal end, and wherein the cell may bend or pivot about a plane defined by the points where the fifth strut crosses over the third strut and the sixth strut crosses under the fourth strut.

### Claim 20 (depends on 19)

The stent of claim 19, wherein the third and fourth struts are substantially parallel.

### Claim 21 (depends on 19)

The stent of claim 19, wherein the third and fourth struts are aligned with a longitudinal axis of the stent.

### Claim 22 (depends on 19)

The stent of claim 19, wherein the third and fourth struts are aligned with an angle obtuse or acute relative to a longitudinal axis of the stent.

### Claim 23 (depends on 19)

The stent of claim 19, wherein the third and fourth struts are aligned with a helix angle of the stent.

### Claim 24 (depends on 19)

The stent of claim 19, wherein the third strut of a first cell in the circumferential row intersects the sixth strut of a second cell in the circumferential row, and wherein the fourth strut of the first cell intersects the fifth strut of a third cell in the circumferential row.