MULTI-LAYERED STENTS AND METHODS OF IMPLANTING

• US 20100179641A1
• Filed: 03/26/2010
• Published: 07/15/2010
• Est. Priority Date: 02/15/2007
• Status: Abandoned Application

• Current Assignee: Philipp Bonhoeffer, Silvia Schievano, Timothy G. Laske, Timothy R. Ryan
• Original Assignee: Philipp Bonhoeffer, Silvia Schievano, Timothy G. Laske, Timothy R. Ryan
• Inventors: Schievano, Silvia, Bonhoeffer, Philipp, Laske, Timothy G., Ryan, Timothy R.
• Application Number:
  US12/732,329
• Publication Number:
  US 20100179641A1
• Time in Patent Office: Days
• US Class Current: 623/1.150
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/2475 Venous valves
• CPC Class Codes: A61F 2/852 Two or more distinct overlapping stents
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/826 more than one stent being applied sequentially
• CPC Class Codes: A61F 2002/828 Means for connecting a plurality of stents allowing flexibility of the whole structure
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2240/001 Designing or manufacturing processes
• CPC Class Codes: A61F 2250/0015 differing in density or specific weight
• CPC Class Codes: A61F 2250/0018 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2250/006 modular
• CPC Class Codes: Y10T 29/49 Method of mechanical manufacture

Abstract

A method of percutaneously delivering a multi-layered stent assembly to a desired implantation location of a patient including the steps of radially compressing a multi-layered stent assembly to a compressed size for implantation in a patient, the multi-layered stent assembly including a first stent, a second stent coaxially positioned within at least a portion of a length of the first stent, and a valve, wherein the first stent comprises at least one different material property than the second stent. The method further includes delivering the multi-layered stent assembly to the desired implantation location of the patient using a delivery system and substantially simultaneously expanding the first stent and the second stent of the multi-layered stent assembly at the desired implantation location to a radially expanded size that is larger than the compressed size.

Claims

1. A method of percutaneously delivering a multi-layered stent assembly to a desired implantation location of a patient, the method comprising the steps of:

radially compressing a multi-layered stent assembly to a compressed size for implantation in a patient, the multi-layered stent assembly comprising;

a first independent stent comprising a first discrete end and a second discrete end;

a second independent stent comprising a first discrete end and a second discrete end and coaxially positioned within at least a portion of a length of the first stent; and

a valve attached within an internal area of the second stent;

wherein the first stent comprises at least one different material property than the second stent; and

delivering the multi-layered stent assembly to the desired implantation location of the patient using a delivery system; and

substantially simultaneously expanding the first stent and the second stent of the multi-layered stent assembly at the desired implantation location to a radially expanded size that is larger than the compressed size.

2. The method of claim 1, wherein one of the first and second stents comprises at least one attachment feature that is attached to at least one attachment feature of the other of the first and second stents.

3. The method of claim 1, wherein the first stent is moveable relative to the second stent.

4. The method of claim 1, wherein the first stent has a higher flexibility than the second stent.

5. The method of claim 1, wherein the first stent has a lower flexibility than the second stent.

6. The method of claim 1, wherein the first stent is a balloon-expandable stent and the second stent is a radially self-expanding stent.

7. The method of claim 1, wherein each of the first and second stents comprises a series of wire segments arranged in a tubular structure, wherein the wires segments of the first stent are radially offset relative to the wire segments of the second stent.

8. The method of claim 1, wherein the multi-layered stent assembly comprises a third stent, wherein the first and second stents are coaxially positioned relative to the third stent.