# US 5,725,549 A · Coiled stent with locking ends

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- Number: US 5,725,549 A
- Document ID: US5725549A
- Status: Granted
- Kind: A
- Application number: 08/712,873
- Filed: 1996-09-12
- Granted: 1998-03-10
- Earliest claimed: 1994-03-11
- Assignees: Advanced Cardiovascular Systems, Inc.
- Inventors: Sharon Lam
- Web page: https://patentgrep.com/patent/US5725549A

## CPC

- A61M 25/104: {used for angioplasty}
- A61F 2/88: the wire-like elements formed as helical or spiral coils
- A61F 2/92: Stents in the form of a rolled-up sheet expanding after insertion into the vessel {, e.g. with a spiral shape in cross-section}
- A61F 2/958: Inflatable balloons for placing stents or stent-grafts
- A61F 2002/30062: {(bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive}
- A61F 2002/3008: {radio-opaque, e.g. radio-opaque markers}
- A61F 2002/30199: {Three-dimensional shapes}
- A61F 2002/30289: {helically-coiled}
- A61F 2002/30677: {Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body}
- A61F 2210/0004: bioabsorbable
- A61F 2230/0063: Three-dimensional shapes
- A61F 2230/0076: ellipsoidal or ovoid
- A61F 2230/0091: helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section
- A61F 2250/0067: Means for introducing or releasing pharmaceutical products into the body
- A61F 2250/0098: radio-opaque, e.g. radio-opaque markers
- A61M 2025/1045: {for treating bifurcations, e.g. balloons in y-configuration, separate balloons or special features of the catheter for treating bifurcations}
- 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)}
- 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

An intravascular stent comprising a cylindrical body capable of expansion having end assemblies capable of locking in an expanded state. The end assemblies may have a series of tabs and apertures that interlock and rotate as the stent ends expand to an open position to support a section of vasculature or other body lumen. The stent is bio-compatible, may be bio-erodible, and capable of localized drug delivery.

## Claims

### Claim 1

An intraluminal stent implantable in a body lumen, comprising:
a cylindrical body formed from at least one strip disposed along a longitudinal direction, having a first end and a second end perpendicular to the longitudinal edges of said strip, further having a tab and a slot for receiving a tab located at the first end and the second end, said body and said ends further having a first reduced diameter and an adjustable second expanded diameter, wherein at least one said end of said at least one strip is radiopaque.

### Claim 2

An intraluminal stent implantable in a body lumen, comprising
a cylindrical stent body having a first reduced diameter and an adjustable, second expanded diameter;
a first end and a second end on said cylindrical stent body;
at least one ring capable of expanding from a first reduced diameter form to a second, expanded diameter form;
attaching means for attaching said ring to one of said ends of said cylindrical stent body; whereby said ring undergoes irreversible plastic deformation when it is expanded from said first reduced diameter form to said second expanded diameter form, locking said cylindrical stent body in a second expanded diameter.

### Claim 3

An intraluminal stent implantable in a body lumen, comprising:
a body portion formed from a sheet, said sheet having a first longitudinal edge and a second longitudinal edge, further having a first end and a second end wherein said body portion is formed into a substantially cylindrical shape by joining said first longitudinal edge to said second longitudinal edge;
a plurality of helical cuts in said sheet;
a plurality of openings in said first end and said second end;
means for expanding said first end and said second end from a first reduced diameter to a second expanded diameter, so that said first end and said second end are expanded from a first reduced diameter to a second expanded diameter, said first end and said second end undergoing irreversible plastic deformation and locking said stent in said second enlarged diameter form.

### Claim 4 (depends on 3)

The intraluminal stent of claim 3, wherein said first end and said second end are radiopaque.

### Claim 5

A method for repairing a patient's vasculature or other body lumen having an occluded or partially occluded portion, comprising:
mounting an intravascular stent body on a catheter having means for expanding and contracting said stent body, said stent body as mounted on said catheter having a first reduced diameter;
advancing said catheter to position said stent body across the site of repair;
expanding said stent body at said site of repair to engage said patient's vasculature;
expanding a first end and a second on said stent body for locking said first end and said second end in an adjustable, second expanded diameter; and
withdrawing said catheter from said vasculature or other body lumen.