STENT RETAINING SYSTEMS

• US 20130204344A1
• Filed: 02/02/2012
• Published: 08/08/2013
• Est. Priority Date: 02/02/2012
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Tatalovich, Joe, Zaver, Steve, Kusleika, Rich, Thorson, Sara, Miezwa, Megan, Noffke, Paul
• Granted Patent: US 10,028,854 B2
• Time in Patent Office: Days
• US Class Current: 623/1.12
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/962 having an outer sleeve
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

A stent delivery system includes an expandable stent, a catheter, and a sheath. The expandable stent includes proximal and distal ends, and a first interlock structure. The catheter includes an elongated member having a second interlock structure displaceably arranged about an outer surface thereof for engaging the first interlock structure of the stent. The sheath is mounted on the elongated member and is positionable in a transport position in which the sheath covers the stent mounted on the elongated member and a deploy position in which the stent is exposed.

Claims

1. A stent delivery system comprising:

an expandable stent having proximal and distal ends, and a first interlock structure;

a catheter including an elongated member having a second interlock structure displaceably arranged about an outer surface thereof for engaging the first interlock structure of the stent; and

a sheath mounted on the elongated member, the sheath being positionable in a transport position in which the sheath covers the stent mounted on the elongated member and a deploy position in which the stent is at least partially exposed.

2. The stent delivery system of claim 1, wherein the second interlock structure is freely moveable along a longitudinal length of the elongated member.

3. The stent delivery system of claim 1, wherein the second interlock structure is moveable over a predetermined length of the elongated member.

4. The stent delivery system of claim 1, wherein the second interlock structure is positioned on a floating retaining ring.

5. The stent delivery system of claim 4, wherein the floating retaining ring is a discontinuous ring extending partially around the elongated member.

6. The stent delivery system of claim 1, wherein the second interlock structure is attached to an intermediate tube disposed between the elongated member of the catheter and the sheath.

7. The stent delivery system of claim 1, wherein the second interlock structure is attached to the elongated member by a flexible structure that allows the second interlock structure to move a predetermined distance along the elongated member.

8. The stent delivery system of claim 7, wherein the flexible structure is a spring.

9. The stent delivery system of claim 1, wherein the expandable stent is a self-expanding stent.

10. A stent delivery system comprising:

an expandable stent including a plurality of interconnected cells extending between a proximal end and a distal end;

a catheter including an elongated member having a stent mounting location, the elongated member including a deformable retaining ring disposed around the elongated member; and

a sheath mounted on the elongated member, the sheath being positionable in a transport position in which the sheath covers the stent mounted at the stent mounting location of the elongated member and a deploy position in which the stent is at least partially exposed,

wherein the deformable retaining ring defines a diameter that is larger than a diameter of the sheath such that when the sheath is in the transport position an outer edge of the deformable retaining ring overlies the proximal end of the stent.

11. The stent delivery system of claim 10, wherein the deformable retaining ring is a fabricated from a foam or an elastomer.

12. The stent delivery system of claim 10, wherein the deformable retaining ring is a discontinuous ring extending partially around the elongated member.

13. A stent delivery system comprising:

an expandable stent including a plurality of interconnected cells extending between a proximal end and a distal end;

a catheter including an elongated member having a stent attachment location including a compressible material; and

a sheath mounted on the elongated member, the sheath being positionable in a transport position in which the sheath covers the stent mounted at the stent mounting location of the elongated member such that the cells of the stent are pressed into and capture the compressible material, and a deploy position in which the stent is at least partially exposed.

14. The stent delivery system of claim 13, wherein the compressible material is a foam or an elastomer.

15. The stent delivery system of claim 13, wherein the stent attachment location of the elongated member includes fibers extending radially therefrom, such that when the sheath is in the transport position, the fibers are captured by the cells of the stent.