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US 9,956,099 B2Granted
Thin-walled scaffolds having reduced crimp profile and carrying radiopaque markers
AssigneeAbbott Cardiovascular Systems Inc.
InventorsDiem Ta, Chad Abunassar, Senthil Eswaran, Zhicheng Lin
Life of this patent
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Abstract
A thin-walled scaffold includes a radiopaque marker connected to a link. In a first example, the marker is retained on the strut by a head at one or both ends by swaging. In a second example of a thin-walled scaffold the link is modified to avoid interference during crimping. In a third example a distal end of the thin-walled scaffold is modified to improve deliverability of the thin-walled scaffold. These features are combined in a fourth example.
Claims21
A medical device, comprising:
- a thin-walled scaffold having a network of rings interconnected by links, wherein each ring has a plurality of crests, wherein a crest is one of a U crown, Y crown and W crown, each ring extends circumferentially in an undulating fashion along a vertical axis (B-B) perpendicular to a longitudinal axis (A-A);
- and
- a marker link extending between a first ring and a second ring of the network of rings, the marker link including a structure having a hole and a radiopaque material is contained within the hole;
- wherein the marker link forms with the first ring a first ring W crown and with the second ring a second ring Y crown, wherein a ½ wave length of the first ring measured from the first ring W crown to an adjacent U crown of the first ring is greater than a ½ wave length of the second ring measured from the second ring Y crown to an adjacent U crown of the second ring;
- and
- wherein a length of the marker link is greater than a length of a link connecting the second ring to a third ring adjoined with the second ring.
3 more elements
A medical device, comprising:
- a thin-walled scaffold having proximal and distal end portions formed by a network of rings interconnected by links, wherein each ring of the network of rings includes a plurality of crests, wherein a crest is one of a U crown, Y crown and W crown, and each ring extends circumferentially in an undulating fashion along a vertical axis (B-B) perpendicular to a longitudinal axis (A-A);
- a marker link extending between a first ring and a second ring of the rings, the marker link including a structure having a hole and a radiopaque material is contained within the hole;
- wherein the marker link forms with the first ring a first ring W crown and with the second ring a second ring Y crown, the first right W crown corresponding to a first crest;
- wherein a first wave length of the first ring measured from the first crest to a second crest of the first ring, adjacent the first crest, is greater than a second wave length of the first ring measured from the second crest to an adjacent third crest of the first ring;
- and
- wherein the marker link has an aspect ratio (AR) of between about 4 and 5, or about 4.5, where AR is defined as a maximum width of the marker link divided by a wall thickness of the marker link.
3 more elements
A medical device, comprising:
- a balloon catheter having a balloon, the balloon having a distal balloon end and a proximal balloon end;
- a thin-walled scaffold crimped to the balloon, the scaffold having proximal and distal end portions formed by a network of rings interconnected by links, wherein each ring has a plurality of crests, wherein a crest is one of a U crown, Y crown and W crown, and each ring extends circumferentially in an undulating fashion along a vertical axis (B-B) perpendicular to a longitudinal axis (A-A);
- a marker link extending between a first ring and a second ring of the rings, the marker link including a structure having a hole and a radiopaque material is contained within the hole;
- wherein the marker link forms with the first ring a first ring W crown and with the second ring a second ring Y crown, the first ring W crown corresponding to a first crest;
- wherein a first wave length of the first ring measured from the first crest to a second crest adjacent the first crest is greater than a second wave length of the first ring measured from the second crest to a third crest adjacent the second crest;
- wherein the thin-walled scaffold has an outer diameter of about D-min;
- and
- wherein
- D-min=(1/π)×[(n×strut_width)+(m×link_width)]+2*t,
- “n” is the number of struts in a ring,
- “strut_width” is the width of a strut,
- “m” is the number of links adjoining adjacent rings,
- “link_width” is the width of a link, and
- “t” is the wall thickness.
11 more elements
Dependencies are inferred from the claim text.