Rapid Exchange Stent Delivery System and Associated Components

• US 20090105808A1
• Filed: 12/17/2008
• Published: 04/23/2009
• Est. Priority Date: 03/14/2001
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Powell, August, Gerdts, Michael, Bronson, Mary
• Granted Patent: US 8,444,685 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/962 having an outer sleeve
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters

Abstract

A rapid exchange stent delivery catheter includes an inner tubular member having a proximal portion, a distal portion, a stent holding portion located adjacent the distal portion of the inner member, and a guide wire lumen extending from a proximal guide wire opening disposed distal of the proximal portion of the inner member to a distal guide wire opening disposed at a distal end of the inner member. The proximal guide wire opening has a first length. An outer tubular member is slidably disposed about the inner member. The outer member has a proximal portion, a distal portion, and a guide wire opening disposed distal of the proximal portion of the outer member. The guide wire opening of the outer member has a second length that is shorter than the first length and a guide wire ramp extends into, and is movable along the first length.

Claims

1. A medical device assembly comprising:

a first tubular member having a proximal portion, a distal portion, a holding portion located adjacent the distal portion of the inner member for holding an expandable medical device thereon, and a guide wire lumen extending from a proximal guide wire opening disposed distal of the proximal portion of the first tubular member to a distal guide wire opening disposed at a distal end of the first tubular member, wherein the proximal guide wire opening has a first length and the guide wire lumen is eccentrically positioned in the distal portion of the first tubular member; and

a second tubular member slidably disposed about the first tubular member, the second tubular member having a proximal portion, a distal portion, and a guide wire opening disposed distal of the proximal portion of the outer member.

2. The medical device assembly according to claim 1, wherein the guide wire opening of the second tubular member has a second length that is shorter than the first length.

3. The medical device assembly according to claim 1, wherein the second tubular member further comprises a guide wire ramp extending into the guide wire lumen, and movable along the first length.

4. The medical device assembly according to claim 1, further comprising a distal head disposed near the distal end of the first tubular member, the distal head restricting longitudinal movement of the second tubular member relative to the first tubular member.

5. The medical device assembly according to claim 1, wherein the first tubular member further comprises a first handle connected to the proximal portion and the second tubular member further comprises a second handle connected to the proximal portion.

6. The medical device assembly according to claim 5, wherein the expandable medical device is deployed by actuation of the first handle relative to the second handle.

7. The medical device assembly according to claim 1, wherein the expandable medical device comprises a stent.

8. The medical device assembly according to claim 5, wherein the stent is located within a distal portion of the second tubular member in a retracted position and the stent is located distal the distal end of the second tubular member in an extended position.

9. The medical device assembly of claim 1, further comprising a holding sleeve coupled to the holding portion.

10. The medical device assembly of claim 1, further comprising a stent cup coupled to the holding portion.

11. A medical device assembly comprising:

a first tubular member having a proximal portion, a distal portion, a proximal guide wire opening disposed distal of the proximal portion, and a distal guide wire opening disposed at a distal end of the first tubular member, wherein the proximal guide wire opening has a first length and a solid mandrel is disposed in proximal portion of the inner tubular member proximal of the proximal guide wire opening; and

a second tubular member slidably disposed about the first tubular member, the second tubular member having a proximal portion, a distal portion, a guide wire opening disposed distal of the proximal portion of the second tubular member, and a guide wire ramp extending into, and movable along the first length.

12. The medical device assembly according to claim 11, wherein the solid mandrel further comprises a tapered end.

13. The medical device assembly according to claim 11, wherein the guide wire opening of the second member has a second length that is shorter than the first length

14. The medical device assembly according to claim 11, wherein the first tubular member further comprises a holding portion disposed between the proximal portion and the distal portion.

15. The medical device assembly according to claim 14, wherein the holding portion has a third length and the first length is greater than the third length.

16. A medical device assembly comprising:

an inner tubular member having a proximal portion, a distal portion, a medical device holding portion disposed therebetween, and a guide wire lumen extending from a proximal guide wire opening disposed distal of the proximal portion of the inner member to a distal guide wire opening disposed at a distal end of the inner member, wherein the proximal guide wire opening has a first length; and

an outer tubular member slidably disposed about the inner member, the outer member having a proximal portion and a distal portion;

a guide wire sleeve disposed between the proximal portion and the distal portion of the outer tubular member having a guide wire opening and a lumen, wherein the guide wire opening has a ramp extending into the lumen.

17. The medical device assembly according to claim 16, wherein the guide wire opening of the guide wire sleeve has a second length that is shorter than the first length.

18. The medical device assembly according to claim 16, wherein the ramp is moveable within the guide wire lumen.

19. The medical device assembly according to claim 16, wherein the ramp is formed integrally with the guide wire sleeve.

20. The medical device assembly according to claim 16, wherein the guide wire sleeve is a separate component from the proximal portion and the distal portion of the outer tubular member.