Prosthesis having a plurality of distal and proximal prongs

• US 20130138203A1
• Filed: 01/22/2013
• Published: 05/30/2013
• Est. Priority Date: 11/10/2005
• Status: Active Grant

• Current Assignee: Edwards Lifesciences CardiAQ LLC (Edwards Lifesciences Corporation)
• Original Assignee: Cardiaq Valve Technologies Incorporated
• Inventors: Quadri, Arshad
• Granted Patent: US 9,486,336 B2
• Time in Patent Office: Days
• US Class Current: 623/1.16
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2002/8486 provided on at least one of the ends
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped

Abstract

An expandable vascular stent includes an m×n array of ovals formed in a cylinder, m being the number of columns of ovals in the circumferential direction and n being the number of rows of ovals in the axial direction, and a plurality of prongs extending inwardly from the outer ends of respective ovals in rows 1 and n of the m×n array, and being arranged in facing pairs extending from axially-aligned ovals. The cylinder is expandable from an initial diameter to a pre-determined final diameter, wherein an increase in the diameter of the stent results in a substantial decrease in the length of the stent. The tube and the prongs can be made of surgical stainless steel, the tube being expandable using an angioplasty balloon; or the tube and the prongs can be made of a memory metal and the tube is self-expanding.

Claims

1. A prosthesis configured to be deployed within a body cavity, the prosthesis comprising:

an expandable frame comprising a proximal end and a distal end and a longitudinal axis extending therethrough, the expandable frame comprising a plurality of cells configured to permit the frame to radially expand and collapse for deployment within the body cavity;

a plurality of proximal prongs each connected to the frame so that when the frame is in an expanded configuration an end of each proximal prong is positioned radially outward from the frame and extends distally in an axial direction generally parallel with the longitudinal axis; and

a plurality of distal prongs each connected to the frame so that when the frame is in an expanded configuration an end of each distal prong is positioned radially outward from the frame and extends proximally in an axial direction generally parallel with the longitudinal axis;

wherein the frame is configured such that radial expansion of the frame causes the ends of the proximal prongs and the ends of the distal prongs to draw closer together.

2. The prosthesis of claim 1, wherein the proximal prongs and distal prongs are arranged in pairs, wherein the ends of the prongs of each pair are generally collinear.

3. The prosthesis of claim 1, further comprising a valve seated inside the expandable frame.

4. The prosthesis of claim 1, wherein the proximal prongs extend radially outwardly from the frame when the frame is in an expanded configuration.

5. The prosthesis of claim 1, wherein the distal prongs extend radially outwardly from the frame when the frame is in an expanded configuration.

6. The prosthesis of claim 1, wherein the cells are generally oval-shaped when the frame is in a collapsed configuration.

7. The prosthesis of claim 1, wherein the cells are generally diamond-shaped when the frame is in an expanded configuration.

8. The prosthesis of claim 1, wherein the plurality of cells comprises an array of rows and columns.

9. The prosthesis of claim 1, wherein the frame comprises a material capable of self-expansion.