Mechanically actuated stents and apparatus and methods for delivering them
First Claim
Patent Images
1. A stent, comprising:
- a first tubular portion comprising a length, the first tubular portion being expandable from a contracted condition to an expanded condition;
a second tubular portion comprising a first annular band disposed adjacent the first tubular portion and a second annular band disposed adjacent the first tubular portion, the second tubular portion being configured such that upon application of an axial compressive force, the first and second annular bands buckle outwardly at a location between the first and second annular bands, the second tubular portion further configured such that the second annular band expands into a ring upon application of a radially outward expansion force.
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Abstract
A stent is provided for deployment into an ostium communicating from a main vessel to a branch vessel. The stent includes a first tubular portion advanceable into the ostium that is expandable from a contracted condition to an expanded condition for dilating a lesion within the ostium. The stent includes a second tubular portion that may be flared radially outwardly to contact the ostium. The stent may be carried on a delivery apparatus including an actuator for expanding the second tubular portion, and one or more balloons for expanding the first distal portion and/or further expanding the proximal portion.
110 Citations
21 Claims
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1. A stent, comprising:
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a first tubular portion comprising a length, the first tubular portion being expandable from a contracted condition to an expanded condition;
a second tubular portion comprising a first annular band disposed adjacent the first tubular portion and a second annular band disposed adjacent the first tubular portion, the second tubular portion being configured such that upon application of an axial compressive force, the first and second annular bands buckle outwardly at a location between the first and second annular bands, the second tubular portion further configured such that the second annular band expands into a ring upon application of a radially outward expansion force.
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2. A stent, comprising:
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a first tubular portion comprising a length, the first tubular portion being expandable from a contracted condition to an expanded condition;
a second tubular portion comprising a first annular band disposed adjacent the first tubular portion and a second annular band disposed adjacent the first tubular portion, the second annular band comprising a plurality of axial elements connected by alternating curved elements, the second tubular portion being configured such that upon application of an axial compressive force, the first and second annular bands buckle outwardly at a location between the first and second annular bands, the second annular band configured such that, upon application of a radially outward expansion force, the curved elements at least partially straighten such that the axial elements at least partially define a circle or ellipse.
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3. An apparatus for treating an ostium communicating between a main body lumen and a branch body lumen, comprising:
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an elongate member comprising a proximal end, a distal end sized for introduction into the main body lumen and the branch body lumen;
a stent on the distal end that is expandable between contracted and enlarged conditions, the stent comprising a first flaring portion, and a second main portion; and
an actuator movable relative to the distal end for buckling the first flaring portion of the stent when the actuator is activated, the first flaring portion comprising first and second annular bands, the first flaring portion configured to buckle radially outwardly between the first and second annular bands when the actuator is activated, thereby defining an intermediate condition. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for delivering a stent within an ostium communicating between a main body lumen and a branch body lumen, the method comprising:
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introducing a stent into the main body lumen with the stent in a contracted condition, the stent comprising a first flaring portion, and a second main portion;
compressing the stent, thereby causing the first flaring portion to buckle radially outwardly to an intermediate condition;
advancing the stent into the ostium with the first flaring portion in the intermediate condition;
expanding the second main portion within the branch body lumen to an enlarged condition; and
expanding the first flaring portion from the intermediate condition to an enlarged condition. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method for delivering a stent within an ostium communicating between a main body lumen and a branch body lumen, the method comprising:
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providing a stent on a distal end of a delivery device, the stent comprising a first flaring portion and a second main portion;
introducing the distal end and the stent into the main body lumen with the stent in a contracted condition; and
activating an actuator on the delivery device, thereby compressing the first flaring portion of the stent, thereby causing the first flaring portion to buckle radially outwardly to an intermediate condition. - View Dependent Claims (20, 21)
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Specification