Medtronic Vascular, Inc.

Rui Lam

Justin Goshgarian

Lance Ensign

Richard Bliss

Dustin Thompson

Matthew Baldwin

Erik Griswold

Padraig Savage

Paul John Coates

Larry Childs

Jerry Warmerdam

Justin Eckhardt

Bob Boldig

Charlie Dawson

Michael Costa

Gianfranco Pellegrini

Mark Hoff

Giangranco Pellegrini

An apparatus for forming a wave form for a stent from a wire includes a pair of tension wires configured to rotate about an axis. The tension wires and axis are substantially orthogonal to the stent wire disposed in a gap between the tension wires. When the tension wires are rotated, a bend is formed in the portion of the stent wire disposed between the tension wires. The tension wires may be controlled such that the axis of rotation is aligned with the particular tension wire around which the stent wire is to be bent for each particular bend formed in the stent wire, thereby preventing the particular tension wire from translating during rotation such that the tension wire behaves like a rotary pipe bending die around which the stent wire is bent. A feed assembly feeds the stent wire into the forming area between the tension wires.

Apparatus and method for forming a wave form for a stent from a wire

A method of manufacturing a stent includes forming a wave form having a plurality of struts and a plurality of crowns. Each crown connects two adjacent struts. The wave form has a central portion and two end portions located on opposite sides the central portion. Some of the struts located in the end portions have lengths longer and/or shorter than an average length of all of the struts of the wave form. The method includes wrapping the wave form about a longitudinal axis to define a plurality of turns so that an end turn is oriented at an angle relative to the longitudinal axis, a second turn is at a first pitch angle that is less than the angle that the end turn is disposed relative to the longitudinal axis, a third turn is at a second pitch angle that is less than the first pitch angle, and a fourth turn is at a third pitch angle that is less than the second pitch angle.

Methods for forming an orthogonal end on a helical stent

The preferentially electropolished stent system and method of manufacture includes a stent delivery system including a catheter; a balloon operably attached to the catheter; and a stent disposed on the balloon. The stent includes an elongate body having an abluminal surface and a luminal surface; wherein the abluminal surface has an abluminal average roughness less than or equal to 0.030 microns; and the luminal surface has at least one rough portion having an luminal average roughness greater than or equal to 0.036 microns.

Preferentially electropolished stent system and method of manufacture

A stent includes a continuous wave form having a plurality of struts and a plurality of crowns throughout the wave form. Each crown connects two adjacent struts. The wave form is wrapped around a longitudinal axis to define a central portion and two end portions located on opposite sides the central portion. The central portion includes a plurality of turns wrapped around the longitudinal axis and oriented at a first pitch angle relative to the longitudinal axis. The end portions each include a plurality of turns wrapped around the longitudinal axis and oriented at different pitch angles, and an end turn oriented at an angle relative to the longitudinal axis. The different pitch angles of the end portions are between the first pitch angle and the angle of the end turn relative to the longitudinal axis.

A stent includes a wave form that includes a plurality of struts and a plurality of crowns. Each crown connects two adjacent struts within the wave form. The wave form is wrapped around a longitudinal axis at a pitch angle to define a plurality of turns and has a central portion and two end portions located on opposite sides of the central portion. At least some of the struts located in the end portions have lengths longer than an average length of all of the struts of the wave form. The stent also includes a plurality of connections. Each connection connects selected crowns from adjacent turns. The connections are positioned along the stent substantially equally so that a density of the number of connections of the end portions is substantially equal to a density of the number of connections of the central portion.

Stent with constant stiffness along the length of the stent

A stent includes a continuous wave form wrapped around a longitudinal axis of the stent at a first pitch angle to define a first helix comprising a plurality of turns. The wave form includes a plurality of struts and a plurality of crowns. Each crown connects adjacent struts within a turn to define the continuous wave form. The stent also includes a plurality of connections configured to connect selected crowns of adjacent turns so that when the stent is in an unexpanded condition, the plurality of connections are aligned at a second pitch angle to define a second helix, and when the stent is in an expanded condition, at least some of the connections align along a substantially straight line parallel to the longitudinal axis of the stent.

Helical stent with connections

A stent includes a wave form that includes a plurality of struts and a plurality of crowns. The wave form is wrapped around a longitudinal axis so as to define a plurality of turns, including a first turn disposed at a first angle and a second turn disposed at a second angle relative to the longitudinal axis. A first connection connects an end of the wave form that started the first turn to an adjacent crown of the wave form that completed the first turn, a second connection connects a first crown of the second turn to an adjacent crown that completed the second turn, and a third connection connects a crown of the first turn to an adjacent crown of the second turn. The wave form is disrupted between the first turn and the second turn.

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Santa Rosa, CA, United States of America

Rui Lam