# US 11,304,832 B2 · Fenestrated stent system and method of use

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- Number: US 11,304,832 B2
- Document ID: US11304832B2
- Status: Granted
- Kind: B2
- Application number: 16/392,283
- Filed: 2019-04-23
- Published: 2019-10-24
- Granted: 2022-04-19
- Earliest claimed: 2018-04-23
- Assignees: Washington University
- Applicants: Mohamed Zayed; Alexander J. Wirtz
- Inventors: Mohamed Zayed; Alexander J. Wirtz
- Web page: https://patentgrep.com/patent/US11304832B2

## CPC

- A61F 2/86: Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F 2/07: Stent-grafts
- A61F 2/89: the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
- A61F 2002/065: {Y-shaped blood vessels}
- A61F 2002/067: {modular}
- A61F 2002/821: {Ostial stents}
- A61F 2230/0008: elliptical or oval
- A61F 2230/0023: triangular
- A61F 2230/0069: cylindrical
- A61F 2240/002: Designing or making customized prostheses
- A61F 2250/0098: radio-opaque, e.g. radio-opaque markers
- 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

The disclosure provides for a device and method for treating aortoiliac occlusion disease with the placement of a fenestrated stent system at the aortic bifurcation. The fenestrated stent system includes a tapered fenestrated stent with a fenestration and a common iliac stent that is placed within the fenestration of the fenestrated stent.

## Claims

### Claim 1

A fenestrated stent system for placement in the aortic bifurcation, the fenestrated stent system comprising:
a fenestrated stent having a distal aorta end and a common iliac end, the fenestrated stent comprising a fenestration at a point between the distal aorta end and the common iliac end and at least one radiopaque marker on an outer surface of the fenestrated stent; and
a common iliac stent having a proximal end and a distal end, the common iliac stent operable for placement through the fenestration of the fenestrated stent and in the contralateral common iliac artery,
wherein the fenestrated stent is tapered 45% to 80% from the distal aorta end to the common iliac end and the common iliac stent is tapered 5% to 25% from the proximal end to the distal end, and
wherein the fenestration comprises a radiopaque wireframe on the fenestration border.

### Claim 2 (depends on 1)

The fenestrated stent system of claim 1, wherein the fenestrated stent is 8 cm in length.

### Claim 3 (depends on 1)

The fenestrated stent system of claim 1, wherein the taper from the distal aorta end to the common iliac end is 50%.

### Claim 4 (depends on 3)

The fenestrated stent system of claim 3, wherein the distal aorta end has a diameter of 14 mm and the common iliac end has a diameter of 7 mm.

### Claim 5 (depends on 1)

The fenestrated stent system of claim 1, wherein the fenestration has an oval, circular, or triangular shape.

### Claim 6 (depends on 5)

The fenestrated stent system of claim 5, wherein the fenestration is oval-shaped and has a size of 10 mm by 8 mm.

### Claim 7 (depends on 1)

The fenestrated stent system of claim 1, wherein the fenestrated stent and the common iliac stent are balloon expandable.

### Claim 8 (depends on 1)

The fenestrated stent system of claim 1, wherein the at least one radiopaque marker is a series of radiopaque lines oriented perpendicular to one another on the outer surface of the fenestrated stent.

### Claim 9 (depends on 1)

The fenestrated stent system of claim 1, wherein the common iliac stent comprises at least one radiopaque marker.

### Claim 10

A method of treating aortoiliac occlusion disease, comprising:
placing a fenestrated stent at a location in the aortic bifurcation, the fenestrated stent having a distal aorta end and a common iliac end an comprising a fenestration at a point between the distal aorta end and the common iliac end and at least one radiopaque marker on an outer surface of the fenestrated stent, wherein the fenestrated stent is tapered 45% to 80% from the distal aorta end to the common iliac end, and wherein the fenestration comprises a radiopaque wireframe on the fenestration border;
identifying the location of the fenestrated stent;
adjusting the fenestrated stent such that the distal aorta end is in the aorta and the common iliac end is in a common iliac;
identifying the location of the fenestration;
adjusting the fenestrated stent so that the fenestration aligns with the contralateral common iliac;
expanding a balloon to expand the fenestrated stent; and
placing a common iliac stent through the fenestration of the fenestrated stent and in the contralateral common iliac artery, wherein the common iliac stent is tapered 5% to 25% from a proximal end to a distal end of the common iliac stent.

### Claim 11 (depends on 10)

The method of claim 10, wherein the fenestrated stent is 8 cm in length.

### Claim 12 (depends on 10)

The method of claim 10, wherein the taper from the distal aorta end to the common iliac end is 50%.

### Claim 13 (depends on 12)

The method of claim 12, wherein the distal aorta end has a diameter of 14 mm and the common iliac end has a diameter of 7 mm.

### Claim 14 (depends on 10)

The method of claim 10, wherein the fenestration has an oval, circular, or triangular shape.

### Claim 15 (depends on 14)

The method of claim 14, wherein the fenestration is oval-shaped and has a size of 10 mm by 8 mm.

### Claim 16 (depends on 10)

The method of claim 10, wherein the at least one radiopaque marker is a series of radiopaque lines oriented perpendicular to one another on the outer surface of the fenestrated stent.

### Claim 17 (depends on 10)

The method of claim 10, wherein the common iliac stent comprises at least one radiopaque marker.