Expandable medical device with S-shaped bridging elements

• US 7,896,912 B2
• Filed: 04/13/2004
• Issued: 03/01/2011
• Est. Priority Date: 03/30/1998
• Status: Expired due to Fees

• Current Assignee: Innovational Holdings, LLC (Johnson & Johnson)
• Original Assignee: Innovational Holdings, LLC (Johnson & Johnson)
• Inventors: Shanley, John F.
• Primary Examiner(s): Bui; Vy Q
• Application Number:
  US10/824,124
• Publication Number:
  US 20040193249A1
• Time in Patent Office: 2,513 Days
• Field of Search: 623/1.15, 606/108, 606/194, 606/195, 606/198
• US Class Current: 623/1.15
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• 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 2250/0018 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2250/0029 differing in bending or flexure capacity
• CPC Class Codes: A61F 2250/0036 differing in thickness
• CPC Class Codes: A61F 2250/0068 the pharmaceutical product being in a reservoir

Abstract

An expandable medical device includes a plurality of cylindrical tubes each formed of a plurality of adjacent struts interconnected at alternating ends. The plurality of cylindrical tubes are expandable from a first diameter to a second diameter at which the adjacent struts form substantially V-shapes. The plurality of cylindrical tubes are arranged with the interconnected ends of the struts aligned facing each other in adjacent cylindrical tubes and a plurality of S-shaped bridging elements connected between the interconnected ends of the struts in adjacent cylindrical tubes. The bridging elements are connected entirely above a midline of the V-shapes on one cylindrical tube and entirely below the midline of the V-shapes on an adjacent cylindrical tube.

Claims

1. A cylindrical expandable stent comprising:

a plurality of cylindrical tubes each formed of a plurality of connected adjacent struts, the plurality of cylindrical tubes expandable from a first diameter to a second diameter;

wherein when in the second diameter, at least some of the adjacent struts form a substantially V-shape with respect to each other, said V-shape having a midline parallel to the longitudinal axis of the stent, said adjacent struts interconnected at alternating ends to define an apex for each V-shape;

a plurality of “

S”

-shaped bridging elements connected between the adjacent cylindrical tubes, one end of each said “

S”

-shaped element having a pair of ends forming an end of said “

S”

-shape, said “

S”

-shaped element connected to one V-shape on a first cylindrical tube and the second end of said “

S”

-shaped element connected to an opposing V-shape on a second cylindrical tube, wherein each of the bridging elements are connected to a cylindrical tube entirely above a midline of each of the V-shapes on one cylindrical tube and entirely below the midline of each of the V-shapes on an adjacent cylindrical tube; and

wherein each of the bridging elements crosses a midline of a V-shape three times.

2. The device of claim 1, wherein the S-shaped bridging elements have an undulating shape extending through greater than 360 degrees.

3. The device of claim 1, wherein the bridging elements are located at a diagonal orientation such that a line extending through the connecting points on either end of each of the bridging elements is located at an angle with respect to a longitudinal axis of the cylindrical tubes.

4. The device of claim 3, wherein all the bridging elements interconnecting two adjacent ones of the cylindrical tubes are located at the same diagonal orientation.

5. The device of claim 1, wherein the bridging elements have a width less than a width of the struts.

6. The device of claim 1, wherein the plurality of adjacent struts are interconnected by ductile hinges and circumferential links.

7. The device of claim 1, wherein the bridging elements allow the device to bend axially.

8. The device of claim 1, wherein the plurality of cylindrical tubes are arranged with V-shapes in one tube substantially at 180 degrees out of phase with respect to the V-shapes of the adjacent cylindrical tubes.