Balloon expandable crush-recoverable stent device
First Claim
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1. A balloon-expandable crush-recoverable stent, comprising:
- a tubular member having a longitudinal axis and a circumferential axis, the tubular member comprising first and second expandable modules linked by at least one flexible member, the at least one flexible member configured to allow the first expandable module to expand to a first expanded diameter and the second expandable module to expand to a second expanded diameter, wherein the first and second expandable modules can be independently actuated and wherein the first and second expanded diameters are independently selectable;
wherein the first expandable module includes a first plurality of substantially non-deforming radial elements slidably-connected to allow the first expandable module to expand from a collapsed diameter to the first expanded diameter in response to an expansive force, a first locking mechanism for maintaining the first expandable module in the expanded diameter after deployment at a treatment site, and a first constraining mechanism for maintaining the first expandable module in the collapsed diameter until released during deployment at a treatment site;
wherein the second expandable module includes a second plurality of substantially non-deforming radial elements slidably-connected to allow the second expandable module to expand from a collapsed diameter to the second expanded diameter in response to an expansive force, a second locking mechanism for maintaining the second expandable module in the expanded diameter after deployment at a treatment site, and a second constraining mechanism for maintaining the second expandable module in the collapsed diameter until released during deployment at a treatment site; and
wherein neither the first constraining mechanism nor the second constraining mechanism pass through a closed passage extending circumferentially between a first opening and a second opening, the first and second openings being substantially perpendicular to the circumferential axis.
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Abstract
An intraluminal, balloon expandable stent for implantation in a body lumen is disclosed. The present invention provides a lumen support stent with an unobstructed through-lumen for use in a blood vessel. A constraining mechanism is provided for securely maintaining the stent in the collapsed condition during delivery. The stent is preferably formed with a series of interconnected slide and lock mechanisms for permitting movement from a collapsed condition to an expanded condition and inhibiting radial recoil from the expanded condition. The stent may be formed from a shape memory alloy for providing crush-recovery after deployment.
439 Citations
20 Claims
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1. A balloon-expandable crush-recoverable stent, comprising:
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a tubular member having a longitudinal axis and a circumferential axis, the tubular member comprising first and second expandable modules linked by at least one flexible member, the at least one flexible member configured to allow the first expandable module to expand to a first expanded diameter and the second expandable module to expand to a second expanded diameter, wherein the first and second expandable modules can be independently actuated and wherein the first and second expanded diameters are independently selectable; wherein the first expandable module includes a first plurality of substantially non-deforming radial elements slidably-connected to allow the first expandable module to expand from a collapsed diameter to the first expanded diameter in response to an expansive force, a first locking mechanism for maintaining the first expandable module in the expanded diameter after deployment at a treatment site, and a first constraining mechanism for maintaining the first expandable module in the collapsed diameter until released during deployment at a treatment site; wherein the second expandable module includes a second plurality of substantially non-deforming radial elements slidably-connected to allow the second expandable module to expand from a collapsed diameter to the second expanded diameter in response to an expansive force, a second locking mechanism for maintaining the second expandable module in the expanded diameter after deployment at a treatment site, and a second constraining mechanism for maintaining the second expandable module in the collapsed diameter until released during deployment at a treatment site; and wherein neither the first constraining mechanism nor the second constraining mechanism pass through a closed passage extending circumferentially between a first opening and a second opening, the first and second openings being substantially perpendicular to the circumferential axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A balloon-expandable crush-recoverable stent, comprising:
a tubular member comprising; at least one flexible linkage element connecting at least two expandable modules along a longitudinal axis of the tubular member, wherein each expandable module comprises first and second inner rails and first and second outer rails and a circumferential centerline, each of the first and second inner rails and the first and second outer rails extending from an end portion of the module to a circumferentially opposite end portion of the module, the first outer rail being positioned outwardly of the first inner rail relative to the circumferential centerline, the second outer rail being positioned outwardly of the second inner rail relative to the circumferential centerline, and wherein each module is configured to radially expand independently of the other module thereby allowing the tubular member to be expanded to various diameters along the longitudinal axis of the tubular member; a locking mechanism provided along the tubular member for maintaining the tubular member in the expanded diameter after deployment at a treatment site; and a constraining mechanism located on at least one of the outer rails for maintaining the tubular member in the collapsed diameter until released by radial expansion of an inflatable balloon during deployment at a treatment site. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification