Reduced wire profile stent

Patent metadata

Field	Value
Publication number	US-9320623-B2
Application number	US-201213644255-A
Country	US
Kind code	B2
Filing date	Oct 3, 2012
Priority date	Oct 4, 2011
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

Methods and apparatuses of stents with likely reduced rates of tissue perforation are provided. Some embodiments include reducing the profile of a portion of the stent using a wire profile reduction electropolishing bath and/or other wire profile reduction means.

First claim

What is claimed is:

1. A stent comprising:
a wire braided into a tubular body comprising a proximal tube portion, a distal tube portion, a central tube portion disposed between the proximal tube portion and the distal tube portion, and a lumen extending between the proximal tube portion and the distal tube portion;
both the proximal tube portion and the distal tube portion each comprises a flange, each flange having an inner flange end, a central flange portion, and an outer flange end terminating in crowns, each flange having a diameter that is greater than the central tube portion;
the inner flange ends and the central tube portion each having an initial wire profile;
each central flange portion comprising a wire second portion, each wire second portion having a wire profile smaller than the initial wire profile; and
the crowns on each flange comprising a wire first portion, each wire first portion having a wire profile smaller than the initial wire profile and smaller than the wire profiles of the wire second portions;
wherein the wire profile of each wire first portion is smaller than the initial wire profile by a first electropolished reduction amount;
the wire profile of each wire second portion is smaller than the initial wire profile by a second electropolished reduction amount;
each wire first portion and each wire second portion has an electropolished surface; and
the initial wire profile is maintained constant from the central tube portion to the inner flange end; and
wherein a radial force exerted from the stent is tailored to the surrounding tissue, with the radial force at each wire first portion being less than the radial force at each wire second portion.

2. The stent of claim 1 , wherein each wire first portion has a wire profile about 10% to about 75% smaller than the initial wire profile.

3. The stent of claim 1 , wherein each wire first portion has a wire profile about 50% smaller than the initial wire profile.

4. The stent of claim 1 , wherein the wire braided into the tubular body has a circular cross-sectional profile.

5. A stent comprising:
a wire braided into a tubular body comprising a proximal tube portion, a distal tube portion, a central tube portion disposed between the proximal tube portion and the distal tube portion, and a lumen extending between the proximal tube portion and the distal tube portion;
both the proximal tube portion and the distal tube portion each comprises a flange, each flange having an inner flange end, a central flange portion, and an outer flange end terminating in crowns, each flange having a diameter that is greater than the central tube portion;
the central tube portion and the central flange portions each having an initial wire profile;
the crowns on each flange comprising a wire first portion, each wire first portion having a wire profile smaller than the initial wire profile; and
each portion of the tubular body transitioning from the central tube portion to each inner flange end comprising a wire second portion, each wire second portion having a wire profile smaller than the initial wire profile;
wherein the wire profile of each wire first portion is smaller than the initial wire profile by a first electropolished reduction amount;
the wire profile of each wire second portion is smaller than the initial wire profile by a second electropolished reduction amount;
each wire first portion and each wire second portion has an electropolished surface; and
the initial wire profile is maintained constant in the central tube portion and each central flange portion; and
wherein a radial force exerted from the stent is tailored to the surrounding tissue.

6. The stent of claim 5 wherein the wire braided into the tubular body has a circular cross-sectional profile.

7. The stent of claim 1 , wherein the wire braided into the tubular body is a single wire.

8. The stent of claim 1 , wherein the wire braided into the tubular body is braided in a helical pattern.

9. The stent of claim 5 , wherein each wire first portion has a wire profile about 50% smaller than the initial wire profile.

10. The stent of claim 5 , wherein the wire braided into the tubular body is a single wire.

11. The stent of claim 5 , wherein the wire braided into the tubular body is braided in a helical pattern.

Assignees

• Cook Medical Technologies Llc

Inventors

• Ryan Michael
• Carlson James Michael

Classifications

• C25F3/16

  Polishing · CPC title

• A61F2/90 Primary

  characterised by a net-like or mesh-like structure · CPC title

• A61F2220/0016

  with sharp anchoring protrusions, e.g. barbs, pins, spikes · CPC title

• A61F2250/0039

  differing in diameter · CPC title

• A61F2220/0008

  Fixation appliances for connecting prostheses to the body · CPC title