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US 12,616,592 B2Granted
Bidirectional stent and method of use thereof
AssigneeQ3 Medical Devices Limited
InventorEric K. Mangiardi
Life of this patent
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Abstract
A bidirectional twistable stent is disclosed. The stent comprises a cylinder-shaped stent body having a plurality of axially arranged rows of struts encircling a central lumen and a plurality of flex connectors that connect at least two adjacent rows of struts in such a manner that allows the stent to be twisted clockwise or counter clockwise without causing deformation of any struts in the stent body. Also disclosed are the method of making the stent, method of using the stent, and a kit containing the stent.
Claims14
A method of using a bidirectional stent, comprising the step of:
- placing the bidirectional stent in a treatment site in a compressed state;
- and
- enlarging the bidirectional stent to an expanded state at the treatment site to immobilize the bidirectional stent,
- wherein the bidirectional stent comprises:
- a cylinder-shaped stent body comprising a plurality of axially arranged rows of struts encircling a central lumen and a plurality of axially arranged alternating rows of s-shaped connectors and rows of opposite s-shaped connectors encircling the central lumen,
- wherein openings are between each of the s-shaped connectors arranged in alternating rows, and
- wherein each row of s-shaped connectors is flanked on both sides by rows of opposite s-shaped connectors and each row of opposite s-shaped connectors is flanked on both sides by rows of s-shaped connectors,
- wherein each of the rows of struts consists of struts inter-connected to form a wave-pattern with alternating peaks and troughs, wherein each peak has a tip and each trough has a bottom,
- wherein each peak in a row of struts is connected at its tip to a peak at its tip in an adjacent row of struts by an s-shaped connector or opposite s-shaped connector,
- wherein the s-shaped connectors in the same row of the s-shaped connectors have the same configuration, and
- wherein when the bidirectional stent is in a resting state, each peak in each row of struts is attached to one end of an s-shaped connector or an opposite s-shaped connector that is attached at its other end to a facing peak of an adjacent row with the facing peak being at an angle to the each peak, and each of the s-shaped connectors or opposite s-shaped connectors has a body having a continuous curve with an inflexion point, and
- wherein when the bidirectional stent is subject to twist, the rows of s-shaped connectors and opposite s-shaped connectors contract or expand in an alternating manner to form a peristaltic shape in the stent body, and the rows of s-shaped connectors or opposite s-shaped connectors that are contracting form a neck shape, and the rows of s-shaped connectors or opposite s-shaped connectors that are expanding form a peristaltic shape, and the neck shape has a lesser radius than the radius of the peristaltic shape at its greatest expanse, thus allowing the stent body to be reversibly twisted clockwise or counter-clockwise from one end of the stent body by a full turn without causing permanent deformation of the struts and the s-shaped connectors or opposite s-shaped connectors in the stent body.
9 more elements
A method for making a bidirectional stent, comprising:
- slitting a cylinder-shaped tube with a laser to create a matrix of struts and connectors that form the bidirectional stent,
- wherein the bidirectional stent comprises:
- a cylinder-shaped stent body comprising a plurality of axially arranged rows of struts encircling a central lumen and a plurality of axially arranged alternating rows of s-shaped connectors and rows of opposite s-shaped connectors encircling the central lumen,
- wherein openings are between each of the s-shaped connectors arranged in alternating rows, and
- wherein each row of s-shaped connectors is flanked on both sides by rows of opposite s-shaped connectors and each row of opposite s-shaped connectors is flanked on both sides by rows of s-shaped connectors,
- wherein each of the rows of struts consists of struts inter-connected to form a wave-pattern with alternating peaks and troughs, wherein each peak has a tip and each trough has a bottom,
- wherein each peak in a row of struts is connected at its tip to a peak at its tip in an adjacent row of struts by an s-shaped connector or opposite s-shaped connector,
- wherein the s-shaped connectors in the same row of the s-shaped connectors have the same configuration, and
- wherein when the bidirectional stent is in a resting state, each peak in each row of struts is attached to one end of an s-shaped connector or an opposite s-shaped connector that is attached at its other end to a facing peak of an adjacent row with the facing peak being at an angle to the each peak, and each of the s-shaped connectors or opposite s-shaped connectors has a body having a continuous curve with an inflexion point, and
- wherein when the bidirectional stent is subject to twist, the rows of s-shaped connectors and opposite s-shaped connectors contract or expand in an alternating manner to form a peristaltic shape in the stent body, and the rows of s-shaped connectors or opposite s-shaped connectors that are contracting form a neck shape, and the rows of s-shaped connectors or opposite s-shaped connectors that are expanding form a peristaltic shape, and the neck shape has a lesser radius than the radius of the peristaltic shape at its greatest expanse, thus allowing the stent body to be reversibly twisted clockwise or counter-clockwise from one end of the stent body by a full turn without causing permanent deformation of the struts and the s-shaped connectors or opposite s-shaped connectors in the stent body.
7 more elements
A stent kit, comprising:
- (1) a bidirectional stent that comprises:
- a cylinder-shaped stent body comprising a plurality of axially arranged rows of struts encircling a central lumen and a plurality of axially arranged alternating rows of s-shaped connectors and rows of opposite s-shaped connectors encircling the central lumen,
- wherein openings are between each of the s-shaped connectors arranged in alternating rows, and
- wherein each row of s-shaped connectors is flanked on both sides by rows of opposite s-shaped connectors and each row of opposite s-shaped connectors is flanked on both sides by rows of s-shaped connectors,
- wherein each of the rows of struts consists of struts inter-connected to form a wave-pattern with alternating peaks and troughs, wherein each peak has a tip and each trough has a bottom,
- wherein each peak in a row of struts is connected at its tip to a peak at its tip in an adjacent row of struts by an s-shaped connector or opposite s-shaped connector,
- wherein the s-shaped connectors in the same row of the s-shaped connectors have the same configuration, and
- wherein when the bidirectional stent is in a resting state, each peak in each row of struts is attached to one end of an s-shaped connector or an opposite s-shaped connector that is attached at its other end to a facing peak of an adjacent row with the facing peak being at an angle to the each peak, and each of the s-shaped connectors or opposite s-shaped connectors has a body having a continuous curve with an inflexion point, and
- wherein when the bidirectional stent is subject to twist, the rows of s-shaped connectors and opposite s-shaped connectors contract or expand in an alternating manner to form a peristaltic shape in the stent body, and the rows of s-shaped connectors or opposite s-shaped connectors that are contracting form a neck shape, and the rows of s-shaped connectors or opposite s-shaped connectors that are expanding form a peristaltic shape, and the neck shape has a lesser radius than the radius of the peristaltic shape at its greatest expanse, thus allowing the stent body to be reversibly twisted clockwise or counter-clockwise from one end of the stent body by a full turn without causing permanent deformation of the struts and the s-shaped connectors or opposite s-shaped connectors in the stent body;
- and
- (2) instructions for using the bidirectional stent.
8 more elements
Dependencies are inferred from the claim text.