Tracheal Stent With Longitudinal Ribs to Minimize Stent Movement, Coughing and Halitosis

• US 20120035715A1
• Filed: 07/27/2011
• Published: 02/09/2012
• Est. Priority Date: 08/09/2010
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Boden, Mark, Robida, Todd
• Granted Patent: US 8,709,093 B2
• Time in Patent Office: Days
• US Class Current: 623/1.36
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• 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 2002/046 Tracheae
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped

Abstract

A tracheal stent is an expandable tubular member having a proximal end, a distal end, an inner surface, and an outer surface. Circumferentially adjacent surface protrusions extend outwardly from the outer surface of the expandable tubular member. These surface protrusions have an outer surface, a first lateral surface and a second lateral surface. When the tracheal stent is deployed, the outer surface of the surface protrusion applies a radial force to a wall of the trachea to remove an airway constriction.

Claims

1. A stent anchoring system for deployment in a lumen of a vessel, the system comprising:

an expandable tubular member having a proximal end, a distal end, a longitudinal axis extending through the proximal and distal ends, an inner surface, an outer surface, a thickness between the inner surface and the outer surface, and a circumference in a plane perpendicular to the longitudinal axis; and

a plurality of surface protrusions extending outwardly from the outer surface of the expandable tubular member, the surface protrusions each having at least an outer surface, a first lateral surface and a second lateral surface, each surface protrusion spaced apart from a circumferentially adjacent surface protrusion,

wherein the first lateral surface of the surface protrusion opposes the second lateral surface of the circumferentially adjacent surface protrusion, and

wherein, upon deployment in the vessel lumen having a vessel wall, only the outer surface of each surface protrusion contacts the vessel wall.

2. The stent anchoring system of claim 1, wherein each surface protrusion is symmetrical to each circumferentially adjacent surface protrusion about the longitudinal axis of the tubular member

3. The stent anchoring system of claim 1, wherein the surface protrusions are ribs that each extend longitudinally along the tubular member from the proximal end of the tubular member to the distal end of the tubular member.

4. The stent anchoring system of claim 3, wherein the ribs have a wave-like pattern with peaks and troughs, and the peak of a first rib confronts the trough of a circumferentially adjacent rib such that the first rib is symmetrical to the circumferentially adjacent rib about the longitudinal axis of the tubular member.

5. The stent anchoring system of claim 1, wherein the surface protrusions are cleats, wherein each cleat is spaced apart both axially and circumferentially from an adjacent cleat.

6. The stent of claim 5, wherein each cleat is symmetrical to each circumferentially adjacent cleat about the longitudinal axis of the tubular member.

7. The stent of claim 5, wherein each cleat is symmetrical to each axially adjacent cleat about a circumference of the tubular member.

8. The stent anchoring system of claim 5, wherein a first cleat, a second cleat, a third cleat and a fourth cleat form a cleat set;

the first cleat is circumferentially adjacent to the second cleat, and the third cleat is circumferentially adjacent to the fourth cleat; and

the first cleat is axially spaced apart from the third cleat, and the second cleat is axially spaced apart from the fourth cleat.

9. The stent of claim 8, wherein the first cleat is symmetrical to the second cleat and the third cleat;

the second cleat is symmetrical to the first cleat and the fourth cleat;

the third cleat is symmetrical to the first cleat and the fourth cleat;

the fourth cleat is symmetrical to the third cleat and the second cleat; and

the first cleat is parallel to the fourth cleat and the second cleat is parallel to the third cleat.

10. The stent of claim 8, wherein the first cleat is perpendicular to the second cleat and the third cleat;

the second cleat is perpendicular to the first cleat and the fourth cleat;

the third cleat is perpendicular to the first cleat and the fourth cleat;

11. The stent anchoring system of claim 1, further comprising a plurality flow passages formed between adjacent surface protrusions, the flow passages defined at least by the outer surface of the tubular member, the first lateral surface of each first surface protrusion and the second lateral surface of each adjacent surface protrusion.

12. The stent anchoring system of claim 11, wherein upon deployment of the stent, the flow passages are further defined by the vessel wall.

13. The stent anchoring system of claim 11, further comprising:

a plurality of holes positioned in at least one flow passage and extending through the outer surface of the tubular member.

14. The stent anchoring system of claim 1, wherein, the outer surface of the surface protrusion applies a radial force to the vessel wall.

15. The stent anchoring system of claim 1, wherein the expandable tubular member has a diameter between about 5 mm and about 30 mm.

16. The stent anchoring system of claim 1, wherein the surface protrusions comprise a metal core covered in polymer.

17. The stent anchoring system of claim 1, wherein the surface protrusions comprise a stiff polymer fiber.