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US 11,633,193 B2Granted
Expandable devices and associated systems and methods
AssigneeCovidien LP
InventorsUjwal Jalgaonkar, Eric Mintz, Gaurav Girdhar, John Wainwright, Ashok Nageswaran, Minh Dinh
Life of this patent
Estimating the term…
Abstract
Expandable devices are disclosed herein. Several of the embodiments are directed towards an expandable device comprising a mesh configured to be expanded at a blood vessel bifurcation of a human patient. The mesh may comprise a tubular body portion and one or more circumferentially discontinuous articulating portions. The mesh may be expanded such that the one or more articulating portions are positioned at an angle to the tubular body portion.
Claims23
An implantable device configured to be positioned across a neck of an aneurysm at a bifurcation of a blood vessel of a patient to prevent or limit blood flow into the aneurysm, the device comprising:
- a generally tubular mesh configured to be implanted within the blood vessel, the mesh having a constrained state for a delivery through a catheter and an expanded state, wherein the tubular mesh comprises a circumferentially continuous first end portion configured to be positioned within a first lumen of the blood vessel and a second end portion, the second end portion comprising (i) a circumferentially discontinuous first articulating region comprising a first surface concave towards a longitudinal dimension of the tubular mesh, a first longitudinal edge, and a second longitudinal edge, opposite the first longitudinal edge along a width of the first articulating region, the first articulating region being configured to be positioned within a second lumen of the blood vessel and (ii) a partially circumferentially discontinuous second articulating region comprising a circumferentially discontinuous portion extending away from the first end portion to a circumferentially continuous portion, the circumferentially discontinuous portion comprising a second surface concave towards the longitudinal dimension of the tubular mesh, opposite the first surface along a circumference of the tubular mesh, a third longitudinal edge, and a fourth longitudinal edge opposite the third longitudinal edge along a width of the second articulating region, the second articulating region being configured to be positioned within a third lumen of the blood vessel, wherein the first and second lumens are distal of the third lumen,
- a first plurality of radiopaque markers attached to the first articulating region and a second plurality of radiopaque markers attached to the second articulating region, wherein the first plurality of radiopaque markers comprises fewer radiopaque markers than the second plurality of radiopaque markers,
- wherein in the constrained state the first longitudinal edge of the first articulating region is located adjacent to the third longitudinal edge of the second articulating region and the second longitudinal edge of the first articulating region is located adjacent to the fourth longitudinal edge of the second articulating region such that the second end portion of the mesh is substantially tubular and the first surface of the first articulating region and the second surface of the second articulating region define a lumen of the second end portion,
- wherein in the expanded state, the tubular mesh is configured so that the first articulating region is positionable at a first angle relative to the first end portion and the second articulating region is positionable at a second angle relative to the first end portion such that the first longitudinal edge of the first articulating region forms a third angle, greater than 90 degrees, with the third longitudinal edge of the second articulating region so that the first articulating region and the second articulating region are extendable in opposite directions in the second lumen of the blood vessel and the third lumen of the blood vessel, respectively, with at least a portion of the mesh proximate to a connection between the first end portion and the first articulating region being positioned across the neck of the aneurysm in order to prevent or limit blood flow into the aneurysm.
1 more element
An implantable device configured to be positioned across a neck of an aneurysm at a bifurcation of a parent blood vessel of a patient into a first branching blood vessel and a second branching blood vessel to prevent or limit blood flow into the aneurysm, the device comprising:
- an expandable mesh configured to be implanted within the first branching blood vessel and the second branching blood vessel, the expandable mesh having a low-profile configuration for a delivery through a catheter and an expanded configuration, wherein the expandable mesh comprises a generally tubular body portion extending from a first end to a second end along a longitudinal dimension of the body portion and an arm portion comprising a circumferentially discontinuous region and a circumferentially continuous region, the circumferentially discontinuous region comprising a surface concave towards the longitudinal dimension of the tubular body portion and extending from a first end at the first end of the body portion to a second end at the circumferentially continuous region along a longitudinal dimension of the arm portion, wherein the body portion carries a plurality of first radiopaque markers spaced apart around a circumference of the body portion and the arm portion carries at least one second radiopaque marker,
- wherein in the low-profile configuration, the longitudinal dimension of the arm portion is generally parallel with the longitudinal dimension of the body portion, and
- wherein in the expanded configuration, the expandable mesh is configured so that the longitudinal dimension of the arm portion is positionable at an angle with respect to the longitudinal dimension of the body portion so that the body portion is configured to be positioned within a lumen of the first branching blood vessel and the arm portion is configured to be positioned within a lumen of the second branching blood vessel such that the first end of the body portion and the first end of the arm portion are positioned proximal of the second end of the body portion and the second end of the arm portion and the expandable mesh is positioned across the neck of the aneurysm, the aneurysm being located between the first and second branching blood vessels, in order to prevent or limit blood flow into the aneurysm.
An implantable device for reducing blood flow into a bifurcation aneurysm of a patient, the bifurcation aneurysm being located between two blood vessels at a bifurcation of a parent blood vessel into first and second branching blood vessels, the device comprising:
- an expandable mesh configured to be implanted within a vasculature of the patient, the expandable mesh having (i) a radially constrained configuration for a delivery through a catheter in which the expandable mesh is substantially tubular and defines a lumen of the expandable mesh and (ii) an expanded configuration, the expandable mesh comprising a partially circumferentially discontinuous first portion comprising a circumferentially discontinuous first region and a generally tubular second region, the first region comprising a first surface concave towards the lumen of the expandable mesh, a first longitudinal edge, and a second longitudinal edge, opposite the first longitudinal edge along a width of the first portion, the first portion carrying at least one first radiopaque marker, a circumferentially discontinuous second portion comprising a second surface concave towards the lumen of the expandable mesh, a third longitudinal edge, and a fourth longitudinal edge, opposite the third longitudinal edge along a width of the second portion, the second portion carrying at least one second radiopaque marker, and a generally tubular third portion opposite the first portion and the second portion along a length of the expandable mesh, the third portion carrying a plurality of third radiopaque markers spaced apart about a circumference of the third portion,
- wherein in the radially constrained configuration, the first longitudinal edge of the first region is located adjacent to the third longitudinal edge of the second region and the second longitudinal edge of the first region is located adjacent to the fourth longitudinal edge of the second region such that the expandable mesh comprises a substantially tubular shape,
- wherein in the expanded configuration, the expandable mesh is configured so that the second portion is positionable at a first angle relative to the first portion substantially corresponding to a first angle between the first branching blood vessel and the parent blood vessel and the third portion is positionable at a second angle relative to the first portion substantially corresponding to a second angle between the second branching blood vessel and the parent blood vessel so that the first portion is configured to be positioned within the parent blood vessel with the generally tubular second region proximal of the circumferentially discontinuous first region, the second portion is configured to be positioned within the first branching blood vessel, and the third portion is configured to be positioned within the second branching blood vessel, such that at least a portion of the expandable mesh is positioned across a neck of the bifurcation aneurysm and the mesh has a sufficiently low porosity to substantially block blood flow across the mesh and into the bifurcation aneurysm while permitting blood flow from the parent blood vessel to the first and second branching blood vessels.
An implantable device for reducing blood flow into a bifurcation aneurysm within a patient's vasculature, the bifurcation aneurysm being located between two blood vessels at a bifurcation of a parent blood vessel into first and second branching blood vessels, the device comprising:
- an expandable mesh configured to be implanted within the patient's vasculature, the expandable mesh having (i) a radially constrained configuration for a delivery through a catheter in which the expandable mesh is substantially tubular and defines a lumen of the expandable mesh and (ii) an expanded configuration, the expandable mesh comprising a first portion comprising a first plurality of radiopaque markers, a second portion comprising a second plurality of radiopaque markers, and a third portion comprising a third plurality of radiopaque markers, wherein the first and third portions are substantially tubular along at least a portion of their respective lengths and the second portion is circumferentially discontinuous,
- wherein each of the first plurality of radiopaque markers, the second plurality of radiopaque markers, and the third plurality of radiopaque markers are arranged in a specific pattern for distinguishing the first portion, the second portion, and the third portion of the mesh from one another,
- wherein in the radially constrained configuration, the expandable mesh comprises a substantially tubular shape, and
- wherein in the expanded configuration, the first portion is configured to be positioned within a lumen of the parent blood vessel, the second portion is positioned within a lumen of the first branching blood vessel, the third portion is positioned within a lumen of the second branching blood vessel, and at least a portion of the expandable mesh is positioned across a neck of the bifurcation aneurysm and has a sufficiently low porosity to substantially block blood flow across the mesh and into the bifurcation aneurysm while permitting substantially unobstructed blood flow from the parent blood vessel to the first and second branching blood vessels.
1 more element
Dependencies are inferred from the claim text.