# US 8,540,758 B2 · Bifurcation stent and delivery system

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- Number: US 8,540,758 B2
- Document ID: US8540758B2
- Status: Granted
- Kind: B2
- Application number: 11/945,967
- Filed: 2007-11-27
- Published: 2009-07-16
- Granted: 2013-09-24
- Earliest claimed: 2007-11-27
- Applicants: Vimal I. Nanavati
- Inventors: Vimal I. Nanavati
- Web page: https://patentgrep.com/patent/US8540758B2

## CPC

- A61M 25/1002: {characterised by balloon shape (A61M25/1006, A61M25/1009 take precedence)}
- A61F 2/856: Single tubular stent with a side portal passage
- A61F 2/90: characterised by a net-like or mesh-like structure
- A61F 2/954: for placing stents or stent-grafts in a bifurcation
- A61F 2/958: Inflatable balloons for placing stents or stent-grafts
- A61F 2002/061: {provided with means for allowing access to secondary lumens}
- A61F 2002/067: {modular}
- A61F 2250/006: modular
- A61M 25/0108: {using radio-opaque or ultrasound markers}
- A61M 2025/018: {Catheters having a lateral opening for guiding elongated means lateral to the catheter}
- 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

The present invention is directed to a device comprising a catheter tube, which includes a round opening and two platinum radio-opaque markers on its distal end; a guide-wire; a balloon, which includes a wedge-shaped opening; and a stent, which includes an elliptical-shaped opening and three platinum radio-opaque markers. The invention is also directed to methods for using the device for deploying stents to treat bifurcation lesions.

## Claims

### Claim 1

A device, comprising:
a balloon catheter for accessing an internal volume of an artery that is divided into a first and second branch, the balloon catheter comprising a first catheter tube, a first balloon and a first stent, the first catheter tube, the first balloon and the first stent each having an opening;
a first guide-wire for advancing the balloon catheter to a site of plaque buildup substantially near the first and second branch, such that the balloon catheter is substantially at the center of the plaque buildup in the first branch;
a second guide-wire that is advanced through the first catheter tube to a position substantially near the center of the first balloon;
at least one metal radio-opaque marker on the balloon catheter that is used as a guide to align the openings in the first catheter tube, the first balloon and the first stent, respectively, with an opening to the second branch;
wherein the second guide-wire is advanced into the second branch through the openings in the first catheter tube, first balloon and first stent;
wherein the first balloon is inflated to deploy the first stent, and then the first balloon is deflated;
a third guide-wire that is advanced into the second branch;
a second balloon catheter that is advanced using the third guide-wire to the second branch through the first stent, the second balloon catheter comprising a second catheter tube, a second balloon and a second stent;
a fourth guide wire that is advanced into the first branch;
a third balloon catheter that is advanced using the fourth guide wire to the site of the previously deployed first stent in the first branch, which comprises a third catheter tube and a third balloon;
wherein when the second and the third balloons are inflated, whereby the second stent is deployed in the second branch; and
wherein the second and third balloons are deflated and removed from the internal volume.

### Claim 2 (depends on 1)

The device of claim 1, wherein the at least one metal radio-opaque marker is gold or platinum.

### Claim 3 (depends on 1)

The device of claim 1 wherein the first catheter tube has the opening located near a distal end of the first catheter tube and the at least one metal radio-opaque marker is located substantially near the opening in the first catheter tube.

### Claim 4 (depends on 1)

The device of claim 1, wherein the at least one metal radio-opaque marker comprises two metal radio-opaque markers and the first catheter tube includes the two metal radio-opaque markers on opposites side of the opening in the first catheter tube.

### Claim 5 (depends on 1)

The device of claim 1, wherein the at least one metal radio-opaque marker comprises three metal radio-opaque markers and the first stent includes the three metal radio-opaque markers, which are spaced at approximately 90 degree angles relative to the opening in the first stent.

### Claim 6 (depends on 1)

The device of claim 1, wherein the first balloon has proximal and distal ends, and the opening in the first balloon is substantially equidistant from the proximal and distal ends of the first balloon.

### Claim 7 (depends on 1)

The device of claim 1, wherein the opening of the first balloon is wedge-shaped.