# US 5,707,387 A · Flexible stent

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- Number: US 5,707,387 A
- Document ID: US5707387A
- Status: Granted
- Kind: A
- Application number: 08/621,481
- Filed: 1996-03-25
- Granted: 1998-01-13
- Earliest claimed: 1996-03-25
- Inventors: Bandula Wijay
- Web page: https://patentgrep.com/patent/US5707387A

## CPC

- A61F 2/915: with bands having a meander structure, adjacent bands being connected to each other
- A61F 2/91: made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes
- A61F 2/88: the wire-like elements formed as helical or spiral coils
- A61F 2002/9155: {Adjacent bands being connected to each other}
- 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

A tubular stent is disclosed that is made of a series of bands having a generally tubular shape with an open end. Each band has an open rectangular form made of an elongated material. The bands have the open ends (or interruptions) in an offset manner and each band has crosstie or ties which are either rigid or flexible. Ties, even if they are straight, can be disposed close to each other, or further away from each other, and can vary in number in order to adjust the relative stiffness of the stent. Each of the bands are preferably a generally rectangular shape and can be made from a wire of a variety of different cross-sections, or can be cut from a flat sheet, or burned out of a cylindrical shape.

## Claims

### Claim 1

A stent comprising
A plurality of bands, each said band composed of an elongated solid wire-like material formed into a closed and substantially rectangular shape, said substantially rectangular shape having two ends, a longitudinal axis along its length and extending between said two ends, and a horizontal axis;
wherein each band is offset from the adjacent band such that the corresponding band ends are offset from each other; and
wherein at least one cross-tie member extends between each pair of adjacent bands thereby connecting said bands; and
wherein said plurality of bands are adapted to be rolled about said band horizontal axis to form a cylindrical stent having a gap between the two ends of each rolled band thus resulting in adjacent bands having relatively offset gaps; and
wherein said bands are adapted to move such that the size of the gap changes in order to accommodate necessary changes in the cylindrical shape of the stent.

### Claim 2 (depends on 1)

The stent of claim 1, wherein:
said crossties are disposed adjacent and in close proximity to and on either side of said interruption on each said band.

### Claim 3 (depends on 1)

The stent of claim 1, wherein:
said crossties are disposed adjacent each other and closer to one side of the gap then they are to the other side of the gap.

### Claim 4 (depends on 1)

The stent of claim 1, further comprising:
each band has an open generally rectangular form.

### Claim 5 (depends on 1)

The stent of claim 1, further comprising:
at least some of said crossties are substantially straight.

### Claim 6 (depends on 1)

The stent of claim 1, further comprising:
at least some of said crossties contain at least one bend.

### Claim 7 (depends on 6)

The stent of claim 6, further comprising:
all of said crossties contain at least two bends.

### Claim 8 (depends on 1)

The stent of claim 1, further comprising:
all of said crossties are substantially straight.

### Claim 9 (depends on 2)

The stent of claim 2, further comprising:
at least some of said crossties are substantially straight.

### Claim 10 (depends on 2)

The stent of claim 2, further comprising:
all of said crossties are substantially straight.

### Claim 11 (depends on 1)

The stent of claim 1, further comprising:
said bands are self-expanding for placing the stent.

### Claim 12 (depends on 1)

The stent of claim 1, further comprising:
said bands are expandable with a delivery device for placing the stent.

### Claim 13 (depends on 8)

The stent of claim 8, further comprising:
said bands are self-expanding for placing the stent.

### Claim 14 (depends on 8)

The stent of claim 8, further comprising:
said bands are expandable with a delivery device for placing the stent.