Segmented scaffolds and delivery thereof for peripheral applications

Patent metadata

Field	Value
Publication number	US-9254212-B2
Application number	US-201213441756-A
Country	US
Kind code	B2
Filing date	Apr 6, 2012
Priority date	Apr 6, 2012
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

Segmented scaffolds composed of disconnected scaffold segments are delivered to an implant site on a delivery balloon. The segments are crimped to the balloon and separated from each other by gaps. When the balloon is inflated the gaps between the disconnected scaffold segments stays constant Pillowed or banded balloons are used to deliver the segments.

First claim

What is claimed is:

1. A method for delivering scaffold segments, comprising:
providing a balloon, the segments being crimped to the balloon, disconnected from each other and arranged end to end over the balloon, wherein ends of adjacent segments are separated by a gap having a gap size;
the balloon having an outer surface comprising a gap region located at the gap and the gap region has a width no greater than the gap size; and
a rigid band having an inner diameter, the rigid band being wrapped around the balloon when the segments are crimped to the balloon, the band being located at the gap region, wherein the rigid band restricts expansion of the balloon in the gap region to no more than the band inner diameter, and wherein a balloon inflated diameter is greater than the band inner diameter; and
inflating the balloon to radially expand the segments, wherein the balloon shortens in response to the rigid band restricting inflation of the balloon at the gap region.

2. The method of claim 1 , wherein the band inner diameter is 5 to 10%, 10 to 20%, 20 to 30%, or more than 30% of the balloon outer diameter when the balloon has a deflated state.

3. The method of claim 1 , wherein a coating comprising an antiproliferative drug is on the scaffold segments.

4. The method of claim 1 , wherein two rigid bands are wrapped around the balloon and one of the scaffold segments is crimped to a balloon portion between the bands.

5. The method of claim 4 , wherein three scaffold segments are crimped to the balloon, one of the segments being crimped between the rigid bands and the other two segments being crimped to the right and left sides, respectively, of the rigid bands.

6. The method of claim 1 , wherein the rigid band has a width between 0.02 inches to 0.20 inches.

7. The method of claim 1 , wherein the rigid band is made from a bioabsorbable polymer or a metal.

8. The method of claim 1 , wherein a segment comprises a plurality of rings, each of which including undulating struts with crests and troughs.

9. The method of claim 8 , wherein the segment comprises a first ring and a second ring, adjacent to the first ring, wherein a link connects each crest of the first ring to a trough of the second ring.

10. The method of claim 8 , wherein the plurality of rings are arranged to form diamond-shaped elements.

Assignees

• Papp John E
• Nguyen Hung T
• Elerath Justin K
• Herabadi Dion I
• Martins Michael T
• King Kirsten S
• Mueller Scott H
• Peloquin Coeta K
• Pacetti Stephen D
• Abbott Cardiovascular Systems

Inventors

• Papp John E
• Nguyen Hung T
• Elerath Justin K
• Herabadi Dion I
• Martins Michael T
• King Kirsten S
• Mueller Scott H
• Peloquin Coeta K
• Pacetti Stephen D

Classifications

• A61F2250/0039

  differing in diameter · CPC title

• A61F2002/9583

  Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve · CPC title

• A61F2210/0076

  multilayered, e.g. laminated structures · CPC title

• A61F2002/826

  more than one stent being applied sequentially · CPC title

• A61F2/958 Primary

  Inflatable balloons for placing stents or stent-grafts · CPC title