Dilatation and stent delivery system and related methods

• US 20110218610A1
• Filed: 05/13/2011
• Published: 09/08/2011
• Est. Priority Date: 05/16/2003
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Damarati, John, Shank, Peter, Abi-Kheirs, Michael, Headley, F. Anthony, Rusk, Emily
• Granted Patent: US 8,668,728 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 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts

Abstract

The invention relates to a system for dilatation of a body passage and delivery of a stent into the body passage of a patient, and related methods of using such a system. The dilatation and stent delivery system may comprise a dilatation catheter having an expandable member on a distal end, and a stent delivery catheter configured to retain a stent and deliver the stent to a body passage. The stent delivery catheter defines a lumen sized to receive the dilatation catheter and permit movement of the dilatation catheter relative to the stent delivery catheter.

Claims

1. A system comprising:

a first catheter, the first catheter comprising a first expandable member;

a second catheter, the second catheter comprising;

an inner shaft, the inner shaft comprising a stent retaining region, the inner shaft defining a lumen sized to receive the first catheter and to permit movement of the first catheter relative to the second catheter;

an outer sheath, the inner shaft positioned within a lumen defined by the outer sheath, the outer sheath having a cross-sectional size;

a first tip, the first tip comprising a first portion, the first portion having a first cross-sectional size at least as large as the cross-sectional size of the outer sheath.

2. The system of claim 1, the first tip defining a lumen.

3. The system of claim 1, further comprising a stent holder, the stent holder being a sleeve coaxially mounted about the inner shaft at the stent retaining region of the inner shaft.

4. The system of claim 1, the first tip being engaged to a distal end of the inner shaft.

5. The system of claim 4, the first tip further comprising a second portion, the second portion proximal to the first portion, the second portion having a second cross-sectional size less than the first cross-sectional size, the second portion being a seat for the sheath when the sheath is in a first position.

6. The system of claim 1, the first tip being engaged to a distal end of the first catheter.

7. The system of claim 1, further comprising a hypotube, the hypotube being positioned within a lumen defined by the first catheter, the first tip being engaged to a distal end of the hypotube.

8. The system of claim 7, wherein the first catheter has a first length, the second catheter has a second length, and the hypotube has a third length, wherein the third length is greater than the first length.

9. The system of claim 7, the hypotube being a coil.

10. The system of claim 1, the first catheter further comprising a second expandable member.

11. The system of claim 1, the second catheter further comprising an expandable member.

12. The system of claim 11, further comprising a stent holder, the stent holder being a sleeve coaxially mounted about the inner shaft at a distal end region of the inner shaft, the expandable member of the second catheter being distal to the stent holder.

13. The system of claim 1, further comprising a first handle, a second handle and a lock mechanism, the first handle engaged to a proximal end of the inner shaft, the second handle engaged to a proximal end of the outer sheath, the lock mechanism engaged to a proximal end of the first handle, the lock mechanism defining a lumen sized to receive the first catheter.

14. The system of claim 13, the lock mechanism comprising a lock portion and a luer adapter, the lock portion forming one end of the lock mechanism and the luer adapter forming the other end of the lock mechanism.

15. The system of claim 13, wherein the lock mechanism is configured to releasably engage the first catheter thereby restricting movement of the first catheter relative to the second catheter.

16. A catheter system comprising:

a tubular member, the tubular member having a cross-sectional size;

a first shaft, at least a portion of the first shaft positioned within a lumen defined by the tubular member;

a second shaft, at least a portion of the second shaft positioned within a lumen defined by the first shaft; and

a third shaft, at least a portion of the third shaft positioned within a lumen defined by the second shaft, the third shaft comprising a tip, wherein at least a portion of the tip has a cross-sectional size at least equal to the cross-sectional size of the tubular member.

17. The catheter system of claim 16, wherein the first shaft is movable relative to the tubular member, the second shaft is moveable relative to the first shaft, and the third shaft is moveable relative to the second shaft.

18. The catheter system of claim 16, wherein a portion of the first shaft is a stent retaining area and the second shaft comprises an expandable member.

19. A catheter system comprising:

a tubular member, the tubular member having a cross-sectional size;

a first shaft, at least a portion of the first shaft positioned within a lumen defined by the tubular member, the first shaft having a tip, at least a portion of the tip has a cross-sectional size at least equal to the cross-sectional size of the tubular member; and

a second shaft, at least a portion of the second shaft positioned within a lumen defined by the first shaft.