Medical device supported by spirally wound wire

• US 5,695,499 A
• Filed: 10/21/1996
• Issued: 12/09/1997
• Est. Priority Date: 10/27/1994
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Schneider Electric SE
• Inventors: Johnson, Wade M., Helgerson, Jeffrey A.
• Primary Examiner(s): Dawson, Glenn K.
• Application Number:
  US08/734,303
• Time in Patent Office: 414 Days
• Field of Search: 606/108, 606/192, 606/198, 606/200, 604/164, 604/264, 604/280, 604/282
• US Class Current: 606/108
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of 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
• 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

Abstract

A stent delivery device is disclosed that includes an inner tube having a distal portion which carries the stent on the delivery device. At least part of the inner tube is formed from a spirally wound wire. A movable outer tube is used to constrain the stent in a radially contracted state on the distal portion of the inner tube. A substantially straight elongate wire is configured inside the spirally wound wire and bonded at the distal and proximal portions of the wound wire. The outer tube may have at least one side port adjacent to the distal portion in communication with the annular space between the outer tube and the inner tube allowing radiopaque fluid to be injected through the annular space and out the side port in the vicinity of the stent.

Claims

1. A medical device for transluminal placement in a remote treatment site in a body passage, comprising:

an elongate inner tube comprising a spirally wound wire having an open distal end and a proximal end, the inner tube forming a lumen adapted to receive a guidewire therethrough;

an outer tube surrounding at least part of the inner tube; and

a substantially straight elongate wire adjacent and bonded to the spirally wound wire at or near the distal end and at or near the proximal end thereof.

2. The device of claim 1 wherein the substantially straight elongate wire is configured inside the spirally wound wire and the device is laterally flexible but essentially longitudinally rigid.

3. The device of claim 1 wherein the straight wire has a generally circular cross-section with a diameter of about 0.005 inches (0.127 mm) to about 0.01 inches (0.254 mm).

4. The device of claim 1 wherein the straight wire has a generally rectangular cross-section and has sides of from about 0.002 inches (0.051 mm) to about 0.012 inches (0.305 mm).

5. The device of claim 1 wherein the spirally wound wire has a generally rectangular cross-section and has sides of from about 0.002 inches (0.051 mm) to about 0.016 inches (0.406 mm).

6. The device of claim 1 wherein the spirally wound wire has a generally circular cross-section with a diameter of about 0.004 inches (0.102 mm) to about 0.02 inches (0.51 mm).

7. The device of claim 1 wherein at least one of the straight wire and the spirally wound wire is formed from a material selected from the group consisting of stainless steel, a superelastic alloy, nitinol, nickel and its alloys and titanium and its alloys.

8. The device of claim 1, further comprising a self-expanding stent constrained on the inner tube by the outer tube.

9. The medical device of claim 1 wherein the outer tube is adapted for longitudinal movement relative to the inner tube.

10. The medical device of claim 1 further comprising a guidewire disposed within the lumen.

11. A medical device for transluminal placement in a remote treatment site in a body passage, comprising:

an elongate inner tube having a distal portion and a proximal portion comprising a spirally wound wire having a distal end and an open proximal end, the inner tube forming a lumen adapted to receive a guidewire therethrough;

an outer tube having a distal portion and a proximal portion surrounding at least the distal portion of the inner tube wherein the outer tube has at least one side port located in the distal portion of the outer tube; and

a substantially straight elongate wire adjacent and bonded to the spirally wound wire at or near the distal end and at or near the proximal end thereof.

12. The device of claim 11 wherein the substantially straight elongate wire is configured inside the spirally wound wire and the device is laterally flexible but essentially longitudinally rigid.

13. The device of claim 11, further comprising a self-expanding stent constrained on the inner tube by the outer tube.

14. The medical device of claim 11 wherein the outer tube is adapted for longitudinal movement relative to the inner tube.

15. The medical device of claim 11 further comprising a guidewire disposed within the lumen.

16. A device for delivering a radially self-expanding stent to a remote treatment site in a body passage, comprising:

an elongate inner tube comprising a spirally wound wire having an open distal end, a proximal end, and a distal portion, the inner tube forming a lumen adapted to receive a guidewire therethrough;

an outer tube movably surrounding at least part of the inner tube;

a substantially straight elongate wire adjacent and bonded to the spirally wound wire at or near the distal end and at or near the proximal end thereof; and

a recapture sleeve coaxially located along the distal end of the elongate inner tube.

17. The device of claim 16 wherein the recapture sleeve is formed from a tube having a soft durometer and has a plurality of grooves formed therein.

18. The device of claim 16 wherein the elongate inner tube has an inside and an outside and the inner tube is at least partially coated by a lubricious material on least one of the inside and outside.

19. The device of claim 16 wherein the substantially straight elongate wire is configured inside the sprially wound wire and the device is laterally flexible but essentially longitudinally rigid.

20. The device of claim 16, further comprising a self-expanding stent constrained on the tuner tube by the outer tube.

21. The medical device of claim 16 further comprising a guidewire disposed within the lumen.

22. A method of deploying a radially self-expanding stent in a remote treatment site in a body passage, comprising:

inserting a delivery device into a body lumen, the device having an elongate inner tube comprising a spirally wound wire having a distal end and a proximal end, the inner tube forming a lumen adapted to receive a guidewire, an outer tube having a distal portion and a proximal portion movably surrounding at least part of the inner tube wherein the outer tube has at least one side port located in the distal portion of the outer tube, a substantially straight elongate wire adjacent and bonded to the spirally wound wire at or near the distal end and at or near the proximal end of the sprially wound wire, and self-expanding stent constrained on the inner tube by the outer tube;

partially deploying the stent by moving the outer tube in a proximal direction; and

injecting radiopaque fluid through an annular space between the inner tube and the outer tube so the radiopaque fluid flows through the at least one side port in the area where the stent is to be deployed.

23. The method of claim 22 wherein the substantially straight elongate wire is configured inside the spirally wound wire and the device is laterally flexible but essentially longitudinally rigid.

24. The method of claim 22 wherein a guide is disposed within the lumen.