Medical device delivery system

• US 20020103525A1
• Filed: 02/01/2001
• Published: 08/01/2002
• Est. Priority Date: 02/01/2001
• Status: Active Grant

• Current Assignee: Charles Cummings
• Original Assignee: Charles Cummings
• Inventors: Cummings, Charles
• Granted Patent: US 6,736,839 B2
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod

Abstract

A medical device delivery system comprises an inner tube, a medical device disposed about a portion of the distal region of the inner tube, a medical device sheath disposed about the medical device, a medical device sheath retraction device extending proximally from the medical device sheath and an outer sheath disposed about a portion of the medical device sheath retraction device. The distal end of the outer sheath terminates at least one medical device length proximal of the medical device. The medical device sheath is movable relative to the outer sheath and relative to the inner tube.

Claims

1. A medical device delivery system comprising:

an inner tube having a proximal region and a distal region and a medical device receiving region at the distal end of the inner tube for receiving a medical device thereabout;

a medical device sheath disposed about the medical device receiving region, the medical device sheath movable relative to the inner tube;

a medical device sheath retraction device extending proximally from the medical device sheath;

an outer sheath disposed about the inner tube, the outer sheath having a proximal and a distal end, the outer sheath disposed about a portion of the medical device sheath retraction device, the distal end of the outer sheath terminating proximal of the medical device receiving region, the medical device sheath movable relative to the outer sheath.

2. The medical device delivery system of claim 1 wherein the medical device is a stent, the system further comprising a stent mounted about the medical device receiving region of the inner tube.

3. The medical device delivery system of claim 1 further comprising a medical device disposed about the inner tube wherein the medical device has a length and the outer sheath terminates at least one medical device length proximal of the medical device.

4. The medical device delivery system of claim 1 further comprising a medical device disposed about the inner tube wherein the outer sheath is characterized by a length which does not exceed the difference in the length of the inner tube and the length of the medical device, the distal end of the outer sheath located proximal to the medical device sheath, the medical device sheath movable relative to the outer sheath.

5. The medical device delivery system of claim 1 further comprising a medical device disposed about the inner tube wherein the outer sheath is characterized by a length which does not exceed the difference in the length of the inner tube and twice the length of the medical device, the distal end of the outer sheath located proximal to the medical device sheath, the medical device sheath movable relative to the outer sheath.

6. The medical device delivery system of claim 1 in over-the-wire form or rapid-exchange form.

7. The medical device delivery system of claim 1 wherein the medical device sheath retraction device is a pull back wire or a hypotube.

8. A stent delivery system comprising:

an inner tube having a proximal region and a distal region;

a stent disposed about a portion of the distal region of the inner tube;

a stent sheath disposed about the stent, the stent sheath movable relative to the inner tube;

a stent sheath retraction device extending proximally from the stent sheath;

an outer sheath having a proximal and a distal end, the outer sheath disposed about a portion of the stent sheath retraction device, the outer sheath characterized by a length which does not exceed the difference in the length between the inner tube and twice the length of the stent, the distal end of the outer sheath located proximal to the stent sheath, the stent sheath movable relative to the outer sheath.

9. The stent delivery system of claim 8 whereby the stent sheath is retracted proximally relative to the inner tube by pulling the stent sheath retraction device in a proximal direction to expose the stent for deployment.

10. The stent delivery system of claim 9 whereby on retraction of the stent sheath, the stent sheath resides longitudinally adjacent to the outer sheath.

11. The stent delivery system of claim 8 wherein the stent sheath retraction device is a pull back wire.

12. The stent delivery system of claim 8 wherein the stent sheath retraction device is a hypotube.

13. The stent delivery system of claim 12 wherein the hypotube is capable of delivering a fluid to the stent.

14. The stent delivery system of claim 8 wherein the stent is self-expanding.

15. The stent delivery system of claim 8 further comprising:

a balloon disposed about the inner tube and underneath the stent; and

an inflation lumen in fluid communication with the balloon for supplying an inflation fluid to the balloon,

and wherein the stent is balloon expandable.

17. The stent delivery system of claim 16 whereby the stent sheath is moved proximally relative to the inner tube and outer sheath to expose the stent for deployment, the distal region of the stent sheath extending distally from the outer sheath.

18. The stent delivery system of claim 16 wherein the stent sheath retraction device is a pull back wire.

19. The stent delivery system of claim 16 wherein the stent sheath retraction device is a hypotube.

16. A stent delivery system comprising:

an inner tube having a proximal region and a distal region;

a stent disposed about a portion of the distal region of the inner tube;

a stent sheath disposed about the stent, the stent sheath movable relative to the inner tube;

a stent sheath retraction device extending proximally from the stent sheath;

an outer sheath having a proximal and a distal end, the outer sheath disposed about a portion of the stent sheath retraction device, the outer sheath characterized by a length which does not exceed the difference in the length of the inner tube and the length of the stent, the distal end of the outer sheath located proximal to the stent sheath, the stent sheath movable relative to the outer sheath.

20. A stent delivery system comprising:

an inner tube having a proximal region and a distal region;

a stent disposed about a portion of the distal region of the inner tube, the stent characterized by a stent length;

a stent sheath disposed about the stent, the stent sheath movable relative to the inner tube;

a stent sheath retraction device extending proximally from the stent sheath;

an outer sheath disposed about a portion of the stent sheath retraction device, the distal end of the outer sheath terminating at least one stent length proximal of the stent, the stent sheath movable relative to the outer sheath.

21. The stent delivery system of claim 20 wherein the outer sheath abuts the stent sheath.

22. The stent delivery system of claim 20 wherein the stent retraction device is a pullwire attached to the stent sheath.

23. The stent delivery system of claim 22 wherein the pullwire is attached to the stent sheath via a pull collar.

24. The stent delivery system of claim 20 wherein the stent retraction device is a tube extending from the stent sheath.

25. The stent delivery system of claim 24 wherein the stent sheath and tube are integrally formed.

26. The stent delivery system of claim 20 whereby the stent sheath is moved proximally relative to the inner tube and outer sheath to expose the stent for deployment, the distal region of the stent sheath extending distally from the outer sheath.

27. The stent delivery system of claim 20 in over-the-wire form.

28. The stent delivery system of claim 20 in rapid-exchange form.