Abstract: A mandrel for forming a stent with a tapered profile and one or more anti-migration features includes a first stent shaping segment having a first diameter, a second stent shaping segment having a second diameter less than the first diameter and a tapered segment disposed therebetween. A third stent shaping segment is releasably securable to the second stent shaping segment and has a third diameter greater than the second diameter. One or more movable pins are outwardly extendable from corresponding apertures formed within the tapered segment. An actuation element is engagable with the first stent shaping segment and includes a tapered surface configured to engage the one or more movable pins and support the one or more movable pins extended from the corresponding apertures.

Abstract: An illustrative stent may comprise an elongated tubular member having a first end and a second end and an intermediate region disposed therebetween. The elongated tubular member configured to move between a collapsed configuration and an expanded configuration. The elongated tubular member may comprise at least one twisted filament, such as a knitted filament having a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches, or a plurality of helical filaments twisted with a plurality of longitudinal filaments.

Abstract: A mandrel for forming a stent with a tapered profile and one or more anti-migration features includes a first stent shaping segment having a first diameter, a second stent shaping segment having a second diameter less than the first diameter and a tapered segment disposed therebetween. A third stent shaping segment is releasably securable to the second stent shaping segment and has a third diameter greater than the second diameter. One or more movable pins are outwardly extendable from corresponding apertures formed within the tapered segment. An actuation element is engagable with the first stent shaping segment and includes a tapered surface configured to engage the one or more movable pins and support the one or more movable pins extended from the corresponding apertures.

Abstract: An illustrative stent may comprise an elongated tubular member having a first end and a second end and an intermediate region disposed therebetween. The elongated tubular member configured to move between a collapsed configuration and an expanded configuration. The elongated tubular member may comprise at least one twisted filament, such as a knitted filament having a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches, or a plurality of helical filaments twisted with a plurality of longitudinal filaments.

Abstract: A stent includes an expandable tubular body formed of one or more interwoven wires, and including a plurality of anti-migration features each having a first end fixed to the tubular body and a second end extending radially outward from an outer surface of the tubular body. The anti-migration features may be formed of a closed loop of one or more of the interwoven wires extending from the outer surface of the tubular body. The closed loops may be formed at the first end, the second end and/or along a medial region of the tubular body. In some instances, the base of the loops may be a cross-over point of the wire(s) forming the closed loop. The wire(s) may be welded at the cross-over point.

Abstract: The present disclosure relates to systems, devices and procedures for forming flow paths within or across body lumens. In one example, a stent comprises an elongate body configured to expand between a first constrained configuration and a second unconstrained configuration. The elongate body in the second unconstrained configuration may include a first end, a second end, and a cylindrical saddle region extending therebetween. The first end may comprise a first retention member and a second retention member, and the second end may comprise a third retention member and a fourth retention member.

Abstract: An occlusion device having a lumen defined therethrough and a saddle narrower than saddles of prior occlusion devices or stents to allow provision of an occlusion element with respect to a portion of the saddle to occlude flow of materials through the saddle. The inner diameter of the narrowed saddle may be 6 mm or less. The occlusion element may be formed from a material which plugs a portion of the occlusion device lumen extending through the saddle and/or which restrains a portion of the saddle from expanding thereby occluding flow of materials therethrough. The remainder of the saddle and/or inwardly facing surfaces of at least one retention member extending outwardly along an end of the saddle may be configured to promote tissue ingrowth, such as by remaining uncoated.

Abstract: Engageable stents disclosed herein may include an outer stent comprising an elongate body configured to be expandable between a constrained configuration and an unconstrained configuration. The elongate body in the unconstrained configuration may include a retention member and a cylindrical saddle region adjacent the retention member, the cylindrical saddle region defining a lumen extending along a longitudinal axis of the outer stent. The retention member of the outer stent may comprise a double-walled flange. The engageable stents may include an inner stent comprising an elongate body configured to be expandable between a constrained configuration and an unconstrained configuration. The elongate body in the unconstrained configuration may include a retention member and a cylindrical saddle region adjacent the retention member. The retention member of the inner stent may comprise a double-walled flange. The retention members of the outer and inner stent may be removably engageable with each other.

Abstract: A stent includes an elongated tubular member expandable from a radially collapsed configuration to a radially expanded configuration, the elongate tubular member including a first plurality of filaments extending in a first helical direction and a second plurality of filaments extending in a second helical direction, the first plurality of filaments extending in the first helical direction and the second plurality of filaments extending in the second helical direction overlapping to form a plurality of cells arranged in rows extending circumferentially about the elongated tubular member. At least some of the cells within one or more rows are adapted to provide increased flexibility to the stent.

Abstract: An illustrative stent may comprise an elongated tubular member having a first end and a second end and an intermediate region disposed therebetween. The elongated tubular member configured to move between a collapsed configuration and an expanded configuration. The elongated tubular member may comprise at least one twisted filament, such as a knitted filament having a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches, or a plurality of helical filaments twisted with a plurality of longitudinal filaments.

Abstract: An illustrative stent may comprise an elongated tubular member having a first end and a second end and an intermediate region disposed therebetween. The elongated tubular member configured to move between a collapsed configuration and an expanded configuration. The elongated tubular member may comprise at least one twisted filament, such as a knitted filament having a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches, or a plurality of helical filaments twisted with a plurality of longitudinal filaments.

Abstract: An illustrative stent may comprise an elongated tubular member having a first end and a second end and an intermediate region disposed therebetween. The elongated tubular member configured to move between a collapsed configuration and an expanded configuration. The elongated tubular member may comprise at least one twisted filament, such as a knitted filament having a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches, or a plurality of helical filaments twisted with a plurality of longitudinal filaments.

Abstract: According to one aspect, a medical system may include a laser source for providing laser energy. The medical system may also include a fluid source containing a fluid for absorbing the laser energy to generate heat. The medical system may further include a medical device operatively coupled to the laser source and the fluid source. The medical device may include a shaft having a distal end, and a cap at the distal end of the shaft. The cap may include a lens and a reflector for deflecting the laser energy toward the lens. The lens may be configured to emit the laser energy from the cap toward a target.

Abstract: An illustrative stent may comprise an elongated tubular member having a first end and a second end and an intermediate region disposed therebetween. The elongated tubular member configured to move between a collapsed configuration and an expanded configuration. The elongated tubular member may comprise at least one twisted filament, such as a knitted filament having a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches, or a plurality of helical filaments twisted with a plurality of longitudinal filaments.

Abstract: A mandrel for forming a stent with a tapered profile and one or more anti-migration features includes a first stent shaping segment having a first diameter, a second stent shaping segment having a second diameter less than the first diameter and a tapered segment disposed therebetween. A third stent shaping segment is releasably securable to the second stent shaping segment and has a third diameter greater than the second diameter. One or more movable pins are outwardly extendable from corresponding apertures formed within the tapered segment. An actuation element is engagable with the first stent shaping segment and includes a tapered surface configured to engage the one or more movable pins and support the one or more movable pins extended from the corresponding apertures.

Abstract: According to one aspect, a medical system may include a laser source for providing laser energy. The medical system may also include a fluid source containing a fluid for absorbing the laser energy to generate heat. The medical system may further include a medical device operatively coupled to the laser source and the fluid source. The medical device may include a shaft having a distal end, and a cap at the distal end of the shaft. The cap may include a lens and a reflector for deflecting the laser energy toward the lens. The lens may be configured to emit the laser energy from the cap toward a target.