BALLOON CATHETER

• US 20110009942A1
• Filed: 02/19/2010
• Published: 01/13/2011
• Est. Priority Date: 02/20/2009
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Groneberg, David D., Petersen, Eric, Grovender, Adam D., Gregorich, Daniel J.
• Granted Patent: US 9,011,511 B2
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• CPC Class Codes: A61F 2/954 for placing stents or stent-grafts in a bifurcation
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2250/0029 differing in bending or flexure capacity
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 2025/1056 having guide wire lumens outside the main shaft, i.e. the guide wire lumen is within or on the surface of the balloon
• CPC Class Codes: A61M 25/0051 made from fenestrated or weakened tubing layer
• CPC Class Codes: A61M 25/0052 Localized reinforcement, e.g. where only a specific part of the catheter is reinforced, for rapid exchange guidewire port
• CPC Class Codes: A61M 25/0053 having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid
• CPC Class Codes: A61M 25/0054 with regions for increasing flexibility
• CPC Class Codes: A61M 25/1011 Multiple balloon catheters
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

Balloon catheters and stent delivery systems including bifurcated stent delivery systems are disclosed. An example bifurcated stent delivery system may include an elongate shaft including a proximal section, a midshaft section, and a distal section. The proximal section may include a tubular member having a plurality of slots formed therein. The slots may be arranged in one or more sections having differing slot densities. The midshaft section may include a guidewire port in fluid communication with a guidewire lumen formed in the shaft. A main branch balloon may be coupled to the shaft. A side branch balloon may be disposed adjacent to the main branch balloon. A stent may be disposed on the main branch balloon and on the side branch balloon.

Claims

1. A bifurcated stent delivery system, comprising:

an elongate shaft including a proximal section, a midshaft section, and a distal section;

wherein the proximal section includes a tubular member having a plurality of slots formed therein, wherein the slots are arranged in one or more sections having differing slot densities;

wherein the midshaft section includes a guidewire port in fluid communication with a guidewire lumen formed in the shaft;

a main branch balloon coupled to the shaft;

a side branch balloon disposed adjacent to the main branch balloon; and

a stent disposed on the main branch balloon and on the side branch balloon.

2. The bifurcated stent delivery system of claim 1, wherein the proximal section includes a sheath disposed along an interior surface, an exterior surface, or both of the tubular member to substantially seal the proximal shaft section.

3. The bifurcated stent delivery system of claim 1, wherein the one or more sections having differing slot densities includes a first section and a second section disposed distally of the first section.

4. The bifurcated stent delivery system of claim 3, wherein the second section has a greater slot density than the first section.

5. The bifurcated stent delivery system of claim 4, wherein the one or more sections having differing slot densities further comprises a third section having a greater slot density than the second section.

6. The bifurcated stent delivery system of claim 1, wherein the one or more section having different slot densities forms a smooth transition in flexibility between the proximal shaft and the midshaft.

7. A bifurcated stent delivery system, comprising:

an elongate shaft including a proximal section, a midshaft section, and a distal section;

wherein the proximal section includes a tubular member having a plurality of slots formed therein, wherein the slots are arranged in one or more sections having differing slot depths;

wherein the midshaft section includes a guidewire port in fluid communication with a guidewire lumen formed in the shaft;

a main branch balloon coupled to the shaft;

a side branch balloon disposed adjacent to the main branch balloon; and

a stent disposed on the main branch balloon and on the side branch balloon.

8. The bifurcated stent delivery system of claim 7, wherein the proximal section includes a sheath disposed along an interior surface, an exterior surface, or both of the tubular member to substantially seal the proximal shaft section.

9. The bifurcated stent delivery system of claim 7, wherein the one or more sections having differing slot depths includes a first section and a second section disposed distally of the first section.

10. The bifurcated stent delivery system of claim 9, wherein the second section has a greater slot depth than the first section.

11. The bifurcated stent delivery system of claim 10, wherein the one or more sections having differing slot depths further comprises a third section having a greater slot depth than the second section.

12. The bifurcated stent delivery system of claim 7, wherein the one or more section having different slot depths forms a smooth transition in flexibility between the proximal shaft and the midshaft.

13. A bifurcated stent delivery system, comprising:

an elongate shaft, the shaft including a proximal section, a midshaft, and a distal section;

wherein the proximal section has a plurality of slots formed therein;

a seal tube disposed adjacent to the proximal section;

wherein the distal section of the elongate shaft includes a distal outer tube and a distal inner tube, the distal inner tube extending distally from the distal outer tube;

a main branch balloon coupled to the shaft, the main branch balloon having a proximal waist attached to the distal outer tube and a distal waist attached to the distal inner tube;

a side branch balloon disposed adjacent to the main branch balloon; and

a stent disposed on the main branch balloon and on the side branch balloon.

14. The bifurcated stent delivery system of claim 13, wherein the slots are arranged in one or more sections having different slot densities.

15. The bifurcated stent delivery system of claim 14, wherein the one or more sections having different slot densities distally increase in slot density.

16. The bifurcated stent delivery system of claim 13, wherein the slots are arranged in one or more sections having different slot depths.

17. The bifurcated stent delivery system of claim 16, wherein the one or more sections having different slot depths distally increase in slot depth.

18. The bifurcated stent delivery system of claim 13, wherein the midshaft includes a guidewire port.

19. The bifurcated stent delivery system of claim 13, further comprising a proximal leg extending between a proximal portion of the side branch balloon and the shaft.

20. The bifurcated stent delivery system of claim 13, further comprising a distal leg extending between a distal portion of the side branch balloon and the shaft.