Rolling membrane stent delivery system

• US 6,544,278 B1
• Filed: 11/10/2000
• Issued: 04/08/2003
• Est. Priority Date: 11/06/1998
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Sogard, David J., Smith, Scott R., Vrba, Anthony C., Monroe, Lance A.
• Primary Examiner(s): Lindsey, Rodney M.
• Application Number:
  US09/711,687
• Time in Patent Office: 879 Days
• Field of Search: 606/192, 606/198, 606/194, 606/108, 604/96.01
• US Class Current: 606/198
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• 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
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61M 25/0119 Eversible catheters

Abstract

A medical device delivery system, having a rolling retractable sheath covering a medical device mounting region on the system is disclosed. The rolling retractable sheath comprises an inner wall and an outer wall and may be formed of one or more materials, optionally porous. Optionally, a lubricant may be applied selectively to the interior and exterior walls of the stent.

Claims

1. A medical device delivery system comprising:

an inner tube, having a distal region and a proximal region, the inner tube having a medical device mounting region at the distal region for mounting a medical device thereon;

an outer tube, at least partially disposed about the inner tube;

a rolling retractable sheath for retaining a medical device about the inner tube and for dilitation of a body vessel, the sheath having a proximal end and a distal end, the sheath disposed about the inner tube, the sheath having an inner wall attached to the inner tube proximal to the medical device mounting region and an outer wall, the inner wall extending distally and attached to the outer wall, the outer wall extending proximally and attached to the outer tube, the sheath defining a chamber, the chamber being in fluid communication with an inflation lumen, the sheath having an uninflated state and an inflated dilitation state.

2. The medical device delivery system of claim 1 wherein the outer tube further comprises a retraction device, the retraction device retaining the rolling retractable sheath in a delivery position when the rolling retractable sheath is in the inflated state, the retraction device moving the outer wall in a proximal direction relative to the inner wall to expose the medical device mounting region, the retraction device operably connected to the outer wall of the rolling retractable sheath.

3. The medical delivery device of claim 2 wherein the retraction device further comprises a catheter having proximal and distal ends and a lumen therein for receiving the inner tube therein, the distal end of the inner tube extending beyond the distal end of the catheter, the outer wall of the rolling retractable sheath attached to the distal end of the catheter.

4. The medical device delivery system of claim 1 wherein the inner and outer walls are adhesively bonded together at an end of the rolling double walled sheath.

5. The medical device delivery system of claim 1 wherein the inner and outer walls are mechanically joined together at an end of the rolling double walled sheath.

6. The medical device delivery system of claim 1 wherein the inner wall of the rolling retractable sheath is formed of at least a first material and the outer wall is formed of at least a second material different from the first material.

7. The medical device delivery system of claim 1 wherein the inner wall has a lower compliance than the outer wall.

8. The medical device delivery system of claim 1 wherein the outer wall of the sheath is thinner than the inner wall of the sheath.

9. The medical device delivery system of claim 1 wherein the inner and outer walls of the sheath are obliquely disposed relative to each other.

10. The medical device delivery system of claim 1 further comprising a lubricant applied to at least a portion of one or more of the inner and outer walls so as to reduce friction between the inner and outer walls.

11. The medical device delivery system of claim 1 further comprising a medical device selected from the group consisting of stents, grafts and vena cava filters, the medical device mounted on the medical device mounting region of the inner tube.

12. The medical device delivery system of claim 1 wherein the medical device is a stent and the stent is self-expandable.

13. The medical device delivery system of claim 1 configured for use in a mode selected from the group consisting of fixed-wire mode, over-the-wire mode and rapid-exchange mode.

14. A method of delivering a stent to a desired bodily location comprising the steps of:

providing a medical device delivery system as in claim 1;

providing a self-expanding stent;

mounting the stent on the medical device mounting region of the medical device delivery system;

percutaneously inserting the medical device delivery system in a bodily lumen containing a bodily fluid,

traversing the bodily lumen until the desired bodily location is reached;

inflating the chamber of the rolling retractable sheath with a fluid;

removing the fluid from the chamber through the inflation lumen;

retracting the rolling retractable sheath proximally so as to expose the stent to self-expand; and

withdrawing the medical device delivery system from the bodily lumen.

15. The medical device delivery system of claim 2, the retraction device further comprising a pull wire.

16. The medical device delivery system of claim 2, the retraction device further comprising an outer sheath.

17. The medical device delivery system of claim 1 wherein the inner wall and the outer wall are integrally formed.