Stents having protruding drug-delivery features and associated systems and methods
First Claim
1. An expandable element for treating a human patient, the expandable element comprising:
- a radially expandable cylindrical frame having struts, a proximal end, a distal end, and a lumen between the proximal end and the distal end and providing a fluid pathway along a longitudinal axis of the frame, wherein the frame is transformable between a deployed state having a deployed diameter and a constrained low-profile delivery state having a smaller, delivery diameter for delivery to a treatment site within a body lumen of the patient; and
a plurality of protruding features carried by and integrally formed with the struts,wherein, when the frame is in the constrained low-profile delivery state, the protruding features do not extend radially outwardly away from the frame, andwherein, as the frame is released or deployed from the constrained low-profile delivery state at the treatment site within the body lumen—
the frame transforms to the deployed state and the deployed diameter, andthe protruding features, moving with the frame, are released to engage tissue of the body lumen such that a first portion of each protruding feature extends from the frame in a direction substantially parallel to the longitudinal axis of the frame and a second portion of each protruding feature forms a terminal end of the protruding feature that extends radially outwardly away from the frame and is positioned entirely distal to the first portion,wherein the frame is collapsible from the deployed state to the delivery state to be retracted within a catheter and withdrawn from the body lumen of the patient.
2 Assignments
0 Petitions
Accused Products
Abstract
Expandable elements having drug-delivery features and associated systems and methods are disclosed herein. In one embodiment, a drug-eluting stent includes a radially expandable cylindrical frame having a plurality of struts. The frame is transformable between a low-profile delivery state and an expanded deployed state. A plurality of drug-delivery features are carried by one of the struts and configured to deliver a drug to a treatment site within the patient or piercing through the tissue wall to break the constricting of the vessel wall inwardly. When the frame is in the expanded state within a body lumen of the patient, the drug-delivery features extend radially outwardly away from the strut and are configured to engage and, in some arrangements, pass through a wall of the body lumen.
87 Citations
32 Claims
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1. An expandable element for treating a human patient, the expandable element comprising:
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a radially expandable cylindrical frame having struts, a proximal end, a distal end, and a lumen between the proximal end and the distal end and providing a fluid pathway along a longitudinal axis of the frame, wherein the frame is transformable between a deployed state having a deployed diameter and a constrained low-profile delivery state having a smaller, delivery diameter for delivery to a treatment site within a body lumen of the patient; and a plurality of protruding features carried by and integrally formed with the struts, wherein, when the frame is in the constrained low-profile delivery state, the protruding features do not extend radially outwardly away from the frame, and wherein, as the frame is released or deployed from the constrained low-profile delivery state at the treatment site within the body lumen— the frame transforms to the deployed state and the deployed diameter, and the protruding features, moving with the frame, are released to engage tissue of the body lumen such that a first portion of each protruding feature extends from the frame in a direction substantially parallel to the longitudinal axis of the frame and a second portion of each protruding feature forms a terminal end of the protruding feature that extends radially outwardly away from the frame and is positioned entirely distal to the first portion, wherein the frame is collapsible from the deployed state to the delivery state to be retracted within a catheter and withdrawn from the body lumen of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An expandable stent for treating a human patient, the expandable stent comprising:
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a radially expandable cylindrical frame having struts, a proximal end, a distal end, and a lumen between the proximal end and the distal end and providing a fluid pathway along a longitudinal axis of the frame, wherein the frame is transformable between a deployed state having a deployed diameter and a constrained low-profile delivery state having a smaller, delivery diameter for delivery to a treatment site within a body lumen of the patient; a plurality of protruding features carried by and integrally formed with the struts, wherein— when the frame is in the delivery state, the protruding features are substantially parallel to the longitudinal axis of the frame, and when the frame is in the deployed state, a first portion of each of the protruding features extends from the frame in a direction substantially parallel to the longitudinal axis of the frame and a second portion of each of the protruding features forms a terminal end of the protruding feature that extends perpendicularly away from the longitudinal axis of the frame to engage tissue of the body lumen and is positioned entirely distal to the first portion; and a longitudinal member coupled to the frame and configured to withdraw the frame in the deployed state from the body lumen, wherein the frame and the protruding features are integrally formed of a metal or metal alloy, wherein the frame and the protruding features are (a) configured to be held in the delivery state by radial compression, and (b) further configured such that, when released from radial compression, the frame self-expands to the deployed diameter, wherein the frame is collapsible from the deployed state to the delivery state to be retracted within a catheter and withdrawn from the body lumen of the patient. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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Specification