# US 10,945,866 B2 · Medical stents

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- Number: US 10,945,866 B2
- Document ID: US10945866B2
- Status: Granted
- Kind: B2
- Application number: 16/100,334
- Filed: 2018-08-10
- Published: 2019-02-14
- Granted: 2021-03-16
- Earliest claimed: 2017-08-14
- Assignees: Boston Scientific Scimed, Inc.
- Applicants: Boston Scientific Scimed Inc.
- Inventors: Martyn G. Folan
- Web page: https://patentgrep.com/patent/US10945866B2

## CPC

- A61F 2/90: characterised by a net-like or mesh-like structure
- 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 2/88: the wire-like elements formed as helical or spiral coils
- D04C 1/06: Braid or lace serving particular purposes
- A61F 2230/0091: helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section
- A61F 2250/0014: having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F 2250/0026: differing in surface structures
- A61F 2250/0067: Means for introducing or releasing pharmaceutical products into the body
- D10B 2509/06: Vascular grafts; stents
- 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)
- D04C: BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE (machines for making soles from strips of material A43D29/00; cane working B27J1/00)
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

An implantable stent may include a braided tubular member formed of braided wires and including radially outward wire segments crossing over and positioned radially outward of radially inward wire segments at a plurality of crossover points. Also, the radially outward wire segments may be coated with a coating and the radially inward wire segments may be uncoated and devoid of the coating.

## Claims

### Claim 1

An implantable stent comprising:
a braided tubular member formed of a plurality of braided wires, the braided tubular member including a plurality of radially outward wire segments crossing over and positioned radially outward of a plurality of radially inward wire segments at a plurality of crossover points;
wherein the radially outward wire segments are coated with a coating and the radially inward wire segments are uncoated and devoid of the coating.

### Claim 2 (depends on 1)

The implantable stent of claim 1, wherein each of the plurality of braided wires includes radially outward wire segments alternating with radially inward wire segments.

### Claim 3 (depends on 1)

The implantable stent of claim 1, wherein the radially outward wire segments are configured to pivot relative to the plurality of radially inward wire segments at the crossover points as the braided tubular member is radially expanded and radially contracted.

### Claim 4 (depends on 1)

The implantable stent of claim 1, wherein the plurality of braided wires define open cells therebetween, wherein the coating does not extend across the open cells between adjacent wires.

### Claim 5 (depends on 1)

The implantable stent of claim 1, wherein an uncoated length of the radially inward wire segments is greater than a length of the radially inward wire segments contacting the radially outward wire segments at the crossover points when the braided tubular member is in a nominally deployed state.

### Claim 6 (depends on 5)

The implantable stent of claim 5,
wherein the braided tubular member is radially compressible from the nominally deployed state to a radially contracted state; and
wherein a length of the radially inward wire segments contacting the radially outward wire segments at the crossover points in the radially contracted state is greater than the length of the radially inward wire segments contacting the radially outward wire segments at the crossover points when the braided tubular member is in the nominally deployed state.

### Claim 7 (depends on 6)

The implantable stent of claim 6, wherein the radially contracted state is determined based on a pivot angle between adjacent wire segments at the crossover points.

### Claim 8 (depends on 7)

The implantable stent of claim 7, wherein the pivot angle has a value between 0° and 45°.

### Claim 9 (depends on 1)

The implantable stent of claim 1, wherein an uncoated length of the radially inward wire segments is greater than a diameter of the radially outward wire segments at the crossover points.

### Claim 10

An implantable stent comprising:
a tubular member formed of a plurality of braided wires forming a braid pattern including a plurality of crossover points;
wherein first and second wire segments of the braided wires intersect at each crossover point such that the first wire segment crosses over and radially outward of the second wire segment while the second wire segment crosses under and radially inward of the first wire segment;
a coating disposed only on the first wire segments which crosses over and is radially outward of the second wire segments;
wherein the second wire segments crossing under and radially inward of the first wire segments are devoid of the coating.

### Claim 11 (depends on 10)

The implantable stent of claim 10, wherein each of the plurality of braided wires include a plurality of first wire segments including the coating alternating with a plurality of second wire segments devoid of the coating along a length of the wire.

### Claim 12 (depends on 10)

The implantable stent of claim 10, wherein the plurality of braided wires includes a first wire, a second wire, a third wire, and a fourth wire;
wherein the first and second wires extend parallel to one another in a first helical direction, and the third and fourth wires extend parallel to one another in an opposite, second helical direction;
wherein the first wire crosses over and radially outward of the third wire at a first crossover point and crosses under and radially inward of the fourth wire at a second crossover point;
wherein the second wire crosses under and radially inward of the third wire at a third crossover point and crosses over and radially outward of the fourth wire at a fourth crossover point;
wherein a first portion of the first wire forms first wire segments coated with the coating and a second portion of the first wire forms second wire segments devoid of the coating;
wherein a first portion of the second wire forms first wire segments coated with the coating and a second portion of the second wire forms second wire segments devoid of the coating;
wherein a first portion of the third wire forms first wire segments coated with the coating and a second portion of the third wire forms second wire segments devoid of the coating; and
wherein a first portion of the fourth wire forms first wire segments coated with the coating and a second portion of the fourth wire forms second wire segments devoid of the coating.

### Claim 13 (depends on 12)

The implantable stent of claim 12, wherein the first wire, the second wire, the third wire, and the fourth wire define an open cell therebetween, wherein the coating does not extend across the open cell.

### Claim 14 (depends on 13)

The implantable stent of claim 13, wherein the first wire, the second wire, the third wire, and the fourth wire are configured to pivot at the first, second, third, and fourth crossover points and axially expand and geometrically alters an appearance of the open cell.

### Claim 15 (depends on 12)

The implantable stent of claim 12, wherein the first wire and the third wire do not slide relative to each other at the first crossover point, the first wire and the fourth wire do not slide relative to each other at the second crossover point, the second wire and the third wire do not slide relative to each other at the third crossover point, and the second wire and the fourth wire do not slide relative to each other at the fourth crossover point.

### Claim 16 (depends on 10)

The implantable stent of claim 10, wherein the coating includes a therapeutic agent.

### Claim 17 (depends on 1)

The implantable stent of claim 1, wherein the coating extends only partially around a circumference of the radially outward wire segments.

### Claim 18 (depends on 17)

The implantable stent of claim 17, wherein at each crossover point, a portion of the radially outward wire segment that faces and/or is in contact with the radially inward wire segment, is devoid of the coating.

### Claim 19 (depends on 10)

The implantable stent of claim 10, wherein the coating extends only partially around a circumference of the first wire segments.

### Claim 20 (depends on 19)

The implantable stent of claim 19, wherein at each crossover point, a portion of the first wire segment that faces and/or is in contact with the second wire segment, is devoid of the coating.