Devices, systems, and methods for the treatment of vascular defects
Devices, systems, and methods for treating vascular defects are disclosed herein. One aspect of the present technology, for example, includes an occlusive device comprising a mesh having a low-profile state for intravascular delivery to the aneurysm and a deployed state, the mesh comprising a first end portion, a second end portion, and a length extending between the first and second end portions, and a first lateral edge, a second lateral edge, and a width extending between the first and second lateral edges. The mesh may have a predetermined shape in the deployed state in which (a) the mesh is curved along its width, (b) the mesh is curved along its length, and (c) the mesh has an undulating contour across at least a portion of one or both of its length or its width. The mesh is configured to be positioned within the aneurysm in the deployed state such that the mesh extends over the neck of the aneurysm.
1. An occlusive device for treating an aneurysm, wherein a neck of the aneurysm opens to a blood vessel, the device comprising:
a mesh having a low-profile state for intravascular delivery to the aneurysm and a deployed state, the mesh comprising—
a distal end, a proximal end, and a length extending between the distal and proximal ends,
a first lateral edge, a second lateral edge, and a width extending between the first and second lateral edges, and
a first side and a second side opposite the first side along a thickness of the mesh, wherein the second side of the mesh is convex,
wherein the mesh is curved along its length and its width;
an embolic element coupled to the proximal end of the mesh at a joint, the embolic element having a proximal end and a distal end; and
a guide positioned between the mesh and the embolic element, the guide having a preset curve along its length configured to orient the mesh relative to the joint such that the first side of the mesh is facing the joint and the second side of the mesh is facing away from the joint, wherein the guide includes a curved portion that includes a turn between about 150 degrees and 210 degrees,
wherein the mesh is configured to be positioned within the aneurysm in the deployed state such that the mesh extends over the neck of the aneurysm and the embolic element is positioned between the mesh and a dome of the aneurysm.
2. The device of claim 1 , wherein the guide comprises a radially-compacted portion of the mesh.
3. The device of claim 1 , wherein the guide is a component separate from the mesh.
4. The device of claim 1 , wherein an average cross-sectional dimension of the guide in a delivery configuration is substantially the same as an average cross-sectional dimension of the guide in a deployed configuration.
5. The device of claim 1 , wherein a greatest cross-sectional dimension of the guide in a deployed configuration is less than a greatest cross-sectional dimension of the mesh in the deployed state.
6. The device of claim 1 , wherein the first side of the mesh is concave.
7. The device of claim 1 , wherein the guide includes a curved portion that includes a turn of about 180 degrees.
8. The device of claim 1 , wherein the mesh is formed of a plurality of braided filaments.
9. The device of claim 1 , wherein the mesh includes a first layer and a second layer, and wherein, in an expanded, unconstrained state, the first layer generally conforms to the second layer such that the mesh does not include an interior volume.
10. The device of claim 1 , wherein the mesh includes a first layer and a second layer, and wherein, in an expanded, unconstrained state, the thickness of the mesh is generally equivalent to a combined thickness of the individual first and second layers.
11. The device of claim 1 , wherein the embolic element is a coil.
12. An occlusive device for treating an aneurysm of a patient, wherein a neck of the aneurysm opens to a blood vessel, the device comprising:
a mesh having a low-profile state for intravascular delivery to the aneurysm and a deployed state, the mesh comprising—
a distal end, a proximal end, and a length extending between the distal and proximal ends,
a first lateral edge, a second lateral edge, and a width extending between the first and second lateral edges, and
a first side and a second side opposite the first side along a thickness of the mesh, wherein the second side of the mesh is convex,
wherein the mesh is curved along the length and the width;
an embolic element coupled to the proximal end of the mesh at a joint, the embolic element having a proximal end and a distal end; and
a guide positioned between the mesh and the embolic element, the guide having a preset curve along its length, wherein the guide includes a curved portion that includes a turn between about 150 degrees and 210 degrees,
wherein, when the occlusive device is positioned within a delivery catheter and a portion of the occlusive device extending between a proximal terminus of the guide and a distal terminus of the mesh have been pushed from the delivery catheter into an open space outside of a body of the patient such that the mesh and guide are in respective expanded, unconstrained configurations, the preset curve is configured to orient the mesh relative to the delivery catheter such that a concave surface of the mesh is facing the same direction as a convex portion of the preset curve,
wherein the mesh is configured to be positioned within the aneurysm in the deployed state such that the mesh extends over the neck of the aneurysm and the embolic element is positioned between the mesh and a dome of the aneurysm.
13. The device of claim 12 wherein, when the occlusive device is positioned within the delivery catheter and the portion of the occlusive device extending between the proximal terminus of the guide and the distal terminus of the mesh have been pushed from the delivery catheter into the open space outside of the body of the patient such that the mesh and guide are in respective expanded, unconstrained configurations, the preset curve is configured to orient the mesh relative to the delivery catheter such that one of the first or second lateral edges is adjacent the delivery catheter.
14. The device of claim 12 , wherein, when the occlusive device is positioned within the delivery catheter and the portion of the occlusive device extending between the proximal terminus of the guide and the distal terminus of the mesh have been pushed from the delivery catheter into the open space outside of the body of the patient such that the mesh and guide are in respective expanded, unconstrained configurations, the preset curve is configured to orient the mesh relative to the delivery catheter such that the concave surface of the mesh and a concave portion of the preset curve of the guide are facing towards one another.
15. The device of claim 12 , wherein the guide comprises a radially-compacted portion of the mesh.
16. The device of claim 12 , wherein the guide is a component separate from the mesh.
17. The device of claim 12 , wherein an average cross-sectional dimension of the guide in a delivery configuration is substantially the same as an average cross-sectional dimension of the guide in a deployed configuration.
18. The device of claim 12 , wherein a greatest cross-sectional dimension of the guide in a deployed configuration is less than a greatest cross-sectional dimension of the mesh in the deployed state.
19. The device of claim 12 , wherein the first side of the mesh is concave.
20. The device of claim 12 , wherein the guide includes a curved portion that includes a turn of about 180 degrees.
21. The device of claim 12 , wherein the mesh is formed of a plurality of braided filaments.
22. The device of claim 12 , wherein the mesh includes a first layer and a second layer, and wherein, in an expanded, unconstrained state, the first layer generally conforms to the second layer such that the mesh does not include an interior volume.
23. The device of claim 12 , wherein the mesh includes a first layer and a second layer, and wherein, in an expanded, unconstrained state, the thickness of the mesh is generally equivalent to a combined thickness of the individual first and second layers.
24. The device of claim 12 , wherein the embolic element is a coil.