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US 10,588,762 B2Granted
Esophageal stent
AssigneeMerit Medical Systems, Inc.
InventorsDarla Gill, Zeke Eller, Rich Snider, Trent Clegg
Life of this patent
Estimating the term…
Abstract
Implantable device embodiments, such as stents, and particularly esophageal stents, formed of a scaffolding structure are disclosed. The scaffolding structure is formed of one or more strand elements arranged in a braided pattern. A covering may coat the scaffolding structure. A valve can be secured to the scaffolding structure and/or the covering. Anti-migration features may be formed by bends in the one or more strand elements. The bends forming the anti-migration features protrude outwardly away from an outer surface of the implantable device.
Claims23
An implantable device to be disposed within a body lumen, the implantable device comprising:
- a scaffolding structure comprising one or more strand elements arranged in an interlaced braid pattern, the scaffolding structure comprising a plurality of zones disposed along a longitudinal length of the scaffolding structure, the scaffolding structure being configured to provide support to the body lumen, the scaffolding defining a cylindrical shape and a lumen through the scaffolding structure, the scaffolding structure comprising:
- a first portion of the interlaced braid pattern comprising a first zone of the plurality of zones having a first uniform diameter and a first compressibility;
- a second portion of the interlaced braid pattern comprising a second zone of the plurality of zones having a second uniform diameter that is the same as the first uniform diameter and a second compressibility that is less than the first compressibility due to features of the scaffolding structure;
- a third portion of the interlaced braid pattern comprising a third zone of the plurality of zones having a third uniform diameter greater than the first uniform diameter and a third compressibility that is greater than the first compressibility due to features of the scaffolding structure;
- and
- a fourth portion of the interlaced braid pattern comprising a fourth zone of the plurality of zones having a fourth uniform diameter substantially equivalent to the third uniform diameter and a fourth compressibility substantially equivalent to the third compressibility due to features of the scaffolding structure;
- a valve coupled to an inside diameter of the scaffolding structure;
- and
- a polymeric cover that is attached to the scaffolding structure such that the cover extends across the entire longitudinal length of the scaffolding structure and between adjacent strand segments of the interlaced braid pattern of the scaffolding structure;
- wherein each strand element of the one or more strand elements extends substantially along the entire longitudinal length of the scaffold structure.
7 more elements
An implantable device to be disposed within a body lumen, the implantable device comprising:
- a scaffolding structure defining a cylindrical shape and a lumen through the scaffolding structure, wherein the scaffolding structure comprises one or more strand elements arranged in an interlaced braid pattern defining a first zone and a second zone, the first zone forming a first portion of a lumen having a first uniform diameter and the second zone forming a second portion of the lumen having a second uniform diameter, wherein the first uniform diameter and the second uniform diameter are the same, the second zone comprising a higher pick count than the first zone,
- wherein the scaffolding structure further comprises a third zone disposed at a first longitudinal end of the scaffolding structure, wherein the second zone is disposed between the first zone and the third zone, and wherein a compressibility of the third zone is greater than a compressibility of the first zone;
- and
- a valve coupled to an inside diameter of the second zone of the scaffolding structure;
- and
- an anti-migration feature formed in a middle zone of the scaffolding structure by a 180-degree bend in a strand element of the scaffolding structure oriented to protrude outwardly and distally from an outer surface of the scaffolding structure to engage with a wall of the body lumen and prevent migration of the scaffolding structure relative to the wall of the body lumen.
3 more elements
An implantable device to be disposed within a body lumen, the implantable device comprising:
- a scaffolding structure defining a cylindrical shape and a lumen through the scaffolding structure, the scaffolding structure comprising one or more strand elements arranged in an interlaced braid pattern, the scaffolding structure configured in a plurality of zones;
- one or more reinforcement members integrated into the scaffolding structure to define a first reinforced zone of the plurality of zones, the first reinforced zone having a lower degree of compressibility than another zone of the plurality of zones comprising a common uniform diameter with the first reinforced zone, wherein the lower degree of compressibility of the first reinforced zone is due to at least one of the braid pattern, braid angle, and presence or positioning of the one or more reinforcement members;
- and
- a valve coupled to an inside diameter of the first reinforced zone of the scaffolding structure;
- wherein each reinforcement member of the one or more reinforcement members runs lengthwise along a portion of a strand element of the one or more strand elements that is arranged in the interlaced braid pattern such that each reinforcement member is in contact with the strand element along the entire length of the reinforcement member, wherein the one or more reinforcement members are only disposed in the first reinforced zone, and wherein each reinforcement member weaves over or under adjacent strand segments;
- wherein a braid angle of the first reinforced zone is greater than a braid angle of another zone of the plurality of zones;
- and
- wherein a pick count of the first reinforced zone is greater than a pick count of the second zone.
5 more elements
Dependencies are inferred from the claim text.