Stent with dynamic anti-migration properties
AssigneeBoston Scientific Scimed, Inc.
InventorMartyn G. Folan
Life of this patent
Estimating the term…
Abstract
A medical stent includes a central stent segment, a proximal stent segment adapted to be positioned over a proximal region of the central stent segment, and a distal stent segment adapted to be positioned over a distal region of the central stent segment. A polymeric coating extends over the proximal stent segment, the distal stent segment and at least a portion of the central stent segment, the polymeric coating adapted to allow the proximal stent segment to float over the proximal region of the central stent segment and to allow the distal stent segment to float over the distal region of the central stent segment. Upon implantation, the central stent segment is adapted to translate relative to the proximal stent segment and the distal stent segment in response to peristaltic forces.
Claims20
A medical stent, comprising:
- a central stent segment including a proximal region and a distal region;
- a proximal stent segment adapted to be positioned over the proximal region of the central stent segment;
- a distal stent segment adapted to be positioned over the distal region of the central stent segment;
- and
- a polymeric coating extending over the proximal stent segment, the distal stent segment and at least a portion of the central stent segment, the polymeric coating adapted to allow the proximal stent segment to float over the proximal region of the central stent segment and to allow the distal stent segment to float over the distal region of the central stent segment;
- wherein upon implantation, the proximal stent segment and/or the distal stent segment are adapted to translate relative to the central stent segment in response to peristaltic forces.
A method of forming a medical stent that includes a central stent segment, a proximal stent segment adapted to be positioned over a proximal region of the central stent segment and a distal stent segment adapted to be positioned over the distal region of the central stent segment, the method comprising:
- disposing the proximal stent segment, the central stent segment and the distal stent segment on a mandrel with the proximal stent segment spaced a proximal distance from a proximal end of the central stent segment and the distal stent segment is spaced a distal distance from a distal end of the central stent segment;
- forming a polymeric coating that extends from the proximal stent segment to the distal stent segment, the polymeric coating spanning between the proximal stent segment and the proximal end of the central stent segment and between the distal end of the central stent segment and the distal stent segment to form a stent assembly;
- removing the stent assembly from the mandrel;
- sliding the proximal stent segment over the proximal region of the central stent segment and sliding the distal stent segment over the distal region of the central stent segment to form the medical stent.
A medical stent, comprising:
- a central stent segment including a proximal region, a flared distal region and an intervening center region;
- a proximal stent segment adapted to be positioned over the proximal region of the central stent segment;
- and
- a polymeric coating extending over the proximal stent segment, the flared distal region and the intervening center region of the central stent segment;
- wherein the polymeric coating is adapted to be doubled over on itself to dispose the proximal stent segment over the proximal region of the central stent segment.
Dependencies are inferred from the claim text.