# US 10,765,540 B2 · Stent and stent delivery device

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- Number: US 10,765,540 B2
- Document ID: US10765540B2
- Status: Granted
- Kind: B2
- Application number: 16/414,689
- Filed: 2019-05-16
- Published: 2019-09-05
- Granted: 2020-09-08
- Earliest claimed: 2012-03-16
- Assignees: Terumo Kabushiki Kaisha
- Applicants: Terumo Corporation
- Inventors: Shirley Vong; Priscilla Tsai; Cang Lam; Ross Soltanian; Greg Bak-Boychuk; Tai D. Tieu; Ponaka Pung; Arnold Tuason; Heather Griffith
- Web page: https://patentgrep.com/patent/US10765540B2

## CPC

- A61F 2/852: Two or more distinct overlapping stents
- A61F 2/844: folded prior to deployment
- A61F 2/885: {comprising a coil including a plurality of spiral or helical sections with alternate directions around a central axis}
- A61F 2/90: characterised by a net-like or mesh-like structure
- A61F 2/966: with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
- A61F 2/9522: {Means for mounting a stent or stent-graft onto or into a placement instrument}
- A61F 2002/823: {Stents, different from stent-grafts, adapted to cover an aneurysm}
- A61F 2002/9528: {for retrieval of stents}
- A61F 2002/9665: {with additional retaining means}
- A61F 2210/0014: using shape memory or superelastic materials, e.g. nitinol
- A61F 2210/0076: multilayered, e.g. laminated structures
- A61F 2230/0021: square
- A61F 2230/005: Rosette-shaped, e.g. star-shaped
- A61F 2230/0058: X-shaped
- A61F 2230/0067: conical
- A61F 2250/0018: differing in elasticity, stiffness or compressibility
- A61F 2250/0023: differing in porosity
- A61F 2250/0039: differing in diameter
- A61F 2250/0098: radio-opaque, e.g. radio-opaque markers
- A61F 2310/00131: Tantalum or Ta-based alloys
- 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

In one embodiment according to the present invention, a stent is described having a generally cylindrical body formed from a single woven nitinol wire. The distal and proximal ends of the stent include a plurality of loops, some of which include marker members used for visualizing the position of the stent. In another embodiment, the previously described stent includes an inner flow diverting layer.

## Claims

### Claim 1

An implant device comprising:
a tubular first layer with a space therethrough; said tubular first layer having a first braid with a first porosity and being entirely composed of a single shape memory metal wire; and,
a tubular second layer located within said space within said tubular first layer; said tubular second layer having a second braid with a second porosity that is lower than said first porosity and being composed of shape memory metal wire;
wherein said tubular second layer is connected to said tubular first layer at one or more locations so as to allow for radial expansion and delivery at about the same time.

### Claim 2 (depends on 1)

The implant device of claim 1 wherein the second porosity is between 45% and 70%.

### Claim 3 (depends on 1)

The implant device of claim 1, further comprising a support wire woven to connect said first layer to said second layer at said one or more locations along a length of said device.

### Claim 4 (depends on 3)

The implant device of claim 3, wherein said support wire is woven in a helical pattern.

### Claim 5 (depends on 3)

The implant device of claim 3, wherein a proximal end of said support wire and a distal end of said support wire are each coiled around portions of said first layer.

### Claim 6 (depends on 3)

The implant device of claim 3, further comprising a second support wire and a third support wire helically woven to connect said first layer to said second layer at said one or more locations along a length of said device.

### Claim 7 (depends on 1)

The implant device of claim 1, wherein said one or more of locations along a length of said device includes a distal end of said device and a proximal end of said device.

### Claim 8 (depends on 1)

The implant device of claim 1, further comprising a first support wire woven to connect said first layer to said second layer near a first end and a middle of said device; and a second support wire woven to connect said first layer to said second layer near a first end and a middle of said device.

### Claim 9 (depends on 1)

The implant device of claim 1, wherein said first layer and said second layer have substantially the same braid pitch.

### Claim 10 (depends on 1)

The implant device of claim 1, wherein said first layer and said second layer have substantially no gap between them.

### Claim 11 (depends on 1)

The implant device of claim 1, wherein the first layer and the second layer have substantially the same pitch and substantially no clearance between the layers.

### Claim 12 (depends on 11)

The implant device of claim 11, wherein said second layer is braided and heat-set to have a diameter equal to an inner diameter of said first layer.

### Claim 13 (depends on 11)

The implant device of claim 11, wherein said first layer and said second layer have substantially the same braid pitch.

### Claim 14 (depends on 11)

The implant device of claim 11, wherein said first layer and said second layer expand at substantially the same rate and foreshorten by substantially the same amount.

### Claim 15 (depends on 11)

The implant device of claim 11, wherein said first layer and said second layer are attached to each other near a proximal end of said device and at a distal end of said device.

### Claim 16 (depends on 11)

The implant device of claim 11, wherein said first layer and said second layer are attached to each other by a support wire woven between said first layer and said second layer in a helical pattern.