# US 10,765,542 B2 · Methods and apparatus for luminal stenting

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- Number: US 10,765,542 B2
- Document ID: US10765542B2
- Status: Granted
- Kind: B2
- Application number: 16/002,831
- Filed: 2018-06-07
- Published: 2018-10-04
- Granted: 2020-09-08
- Earliest claimed: 2009-04-17
- Assignees: Covidien LP
- Applicants: Covidien LP
- Inventors: Aaron L. Berez; Quang Q. Tran
- Web page: https://patentgrep.com/patent/US10765542B2

## CPC

- A61F 2/90: characterised by a net-like or mesh-like structure
- A61B 17/12: for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord
- A61B 17/12022: {Occluding by internal devices, e.g. balloons or releasable wires (plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20)}
- A61B 17/12109: {in a blood vessel}
- A61B 17/12118: {for positioning in conjunction with a stent}
- A61B 17/12168: {having a mesh structure (A61B17/1214 takes precedence)}
- A61B 17/320758: {with a rotating cutting instrument, e.g. motor driven (A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002)}
- A61B 17/320783: {through side-hole, e.g. sliding or rotating cutter inside catheter}
- A61F 2/0105: {Open ended, i.e. legs gathered only at one side}
- A61F 2/013: {Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting}
- A61F 2/06: Blood vessels
- A61F 2/82: Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents (stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07)
- A61F 2/844: folded prior to deployment
- 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 2/915: with bands having a meander structure, adjacent bands being connected to each other
- A61F 2/95: Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F 2/966: with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
- A61F 2/9661: {the proximal portion of the stent or stent-graft is released first}
- A61F 2/9662: {the middle portion of the stent or stent-graft is released first}
- D04C 1/06: Braid or lace serving particular purposes
- A61B 2017/00867: {shape memory effect}
- A61B 2017/1205: {Introduction devices}
- A61B 2017/12054: {Details concerning the detachment of the occluding device from the introduction device}
- A61B 2017/22001: {Angioplasty, e.g. PCTA}
- A61B 2017/320766: {eccentric}
- A61B 2017/320791: {with cutter extending outside the cutting window}
- A61B 2217/005: with suction drainage system
- A61F 2/01: Filters implantable into blood vessels
- A61F 2/07: Stent-grafts
- A61F 2/852: Two or more distinct overlapping stents
- A61F 2/9522: {Means for mounting a stent or stent-graft onto or into a placement instrument}
- A61F 2/958: Inflatable balloons for placing stents or stent-grafts
- A61F 2002/016: {made from wire-like elements}
- A61F 2002/018: {made from tubes or sheets of material, e.g. by etching or laser-cutting}
- A61F 2002/823: {Stents, different from stent-grafts, adapted to cover an aneurysm}
- A61F 2002/826: {more than one stent being applied sequentially}
- A61F 2002/91558: {connected peak to peak}
- A61F 2002/9505: {having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument}
- A61F 2002/9528: {for retrieval of stents}
- A61F 2002/9534: {for repositioning of stents}
- A61F 2002/9665: {with additional retaining means}
- A61F 2230/001: Figure-8-shaped, e.g. hourglass-shaped
- A61F 2230/0069: cylindrical
- A61F 2230/0078: hyperboloidal
- A61F 2230/008: paraboloidal
- A61F 2230/0091: helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section
- A61F 2230/0095: Saddle-shaped
- A61F 2250/0015: differing in density or specific weight
- A61F 2250/0017: differing in yarn density
- A61F 2250/0023: differing in porosity
- A61F 2250/0063: Nested prosthetic parts
- A61M 25/09: Guide wires
- A61M 25/10: Balloon catheters ({A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02;} inflatable balloons for placing stents or stent-grafts A61F2/958 {; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00})
- A61M 2025/09183: {having tools at the distal tip}
- 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)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- 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)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

Described herein are flexible implantable occluding devices that can, for example, navigate the tortuous vessels of the neurovasculature. The occluding devices can also conform to the shape of the tortuous vessels of the vasculature. In some embodiments, the occluding devices can direct blood flow within a vessel away from an aneurysm or limit blood flow to the aneurysm. Some embodiments describe methods and apparatus for adjusting, along a length of the device, the porosity of the occluding device. In some embodiments, the occluding devices allows adequate blood flow to be provided to adjacent structures such that those structures, whether they are branch vessels or oxygen-demanding tissues, are not deprived of the necessary blood flow.

## Claims

### Claim 1

A flow-directing device implantable across an aneurysm in a blood vessel of a patient, the flow-directing device comprising:
a proximal end;
a distal end;
a length extending between the proximal end and the distal end;
a lumen extending the length; and
a plurality of strands braided together, the strands formed of materials comprising a cobalt-nickel alloy;
wherein the flow-directing device has a porosity between the strands configured to direct blood flow away from an aneurysm and to allow blood flow to branch vessels when placed in a blood vessel;
wherein the flow-directing device is self-expandable from a compressed state to an expanded state;
wherein the length of the flow-directing device in the expanded state is shorter than the length of the flow-directing device in the compressed state;
wherein a diameter of each of the plurality of strands is between about 0.0005 inches and 0.0020 inches;
wherein each of the plurality of strands comprises an inner surface and an outer surface, the outer surfaces comprising between about 20% and about 50% of a total circumferential area of the flow-directing device in the expanded state; and
wherein a linear density of the plurality of strands is at least 74.04 picks per inch along the length of the flow-directing device in the expanded state.

### Claim 2 (depends on 1)

The flow-directing device of claim 1, wherein the porosity is between 70% and 80% in the expanded state.

### Claim 3 (depends on 1)

The flow-directing device of claim 1, wherein the flow-directing device has a lattice density between 20% and 50% in the expanded state.

### Claim 4 (depends on 1)

The flow-directing device of claim 1, wherein the flow-directing device has a coverage of 33% in the expanded state.

### Claim 5 (depends on 1)

The flow-directing device of claim 1, wherein the plurality of strands comprises 48 strands.

### Claim 6 (depends on 1)

The flow-directing device of claim 1, wherein the flow-directing device has a diameter between 2.75 mm and 4.25 mm.

### Claim 7 (depends on 1)

The flow-directing device of claim 1, wherein the cobalt-nickel alloy comprises 35NLT.

### Claim 8 (depends on 1)

The flow-directing device of claim 1, wherein each of the plurality of strands has a circular cross-section.

### Claim 9 (depends on 8)

The flow-directing device of claim 8, wherein the diameter of each of the plurality of strands is between 0.001 inches and 0.0014 inches.

### Claim 10 (depends on 1)

The flow-directing device of claim 1, wherein each of the plurality of strands has an oval cross-section.

### Claim 11 (depends on 1)

The flow-directing device of claim 1, wherein each of the plurality of strands has a rectangular cross-section.

### Claim 12 (depends on 1)

The flow-directing device of claim 1, wherein the plurality of strands are braided in a 1 over 1 under 1 pattern.

### Claim 13 (depends on 1)

The flow-directing device of claim 1, wherein the plurality of strands are braided in a 1 over 2 under 2 pattern.

### Claim 14

A flow-directing device implantable across an aneurysm in a blood vessel of a patient, the flow-directing device comprising:
a length between a proximal end of the flow-directing device and a distal end of the flow-directing device;
a lumen extending along at least a portion of the length; and
a plurality of strands braided together, the strands formed of materials comprising a cobalt-nickel alloy;
wherein the flow-directing device has a porosity between the strands configured to direct blood flow away from an aneurysm and to allow blood flow to branch vessels when placed in a blood vessel;
wherein the flow-directing device is self-expandable from a compressed diameter in a compressed state to an expanded diameter, greater than the compressed diameter, in an expanded state;
wherein a diameter of each of the plurality of strands is between about 0.0005 inches and 0.0020 inches;
wherein each of the plurality of strands comprises an inner surface and an outer surface, the outer surfaces comprising between about 20% and about 50% of a total circumferential area of the flow-directing device in the expanded state; and
wherein a linear density of the plurality of strands is at least 74.04 picks per inch along the length of the flow-directing device in the expanded state.

### Claim 15 (depends on 14)

The flow-directing device of claim 14, wherein the porosity is between 70% and 80% in the expanded state.

### Claim 16 (depends on 14)

The flow-directing device of claim 14, wherein the flow-directing device has a diameter between 2.75 mm and 4.25 mm.

### Claim 17 (depends on 14)

The flow-directing device of claim 14, wherein the cobalt-nickel alloy comprises 35NLT.

### Claim 18 (depends on 14)

The flow-directing device of claim 14, wherein the diameter of each of the plurality of strands is between 0.001 inches and 0.0014 inches.