Vascular stenting for aneurysms
AssigneeCovidien LP
InventorsAaron Lee Berez, Quang Quoc Tran
Life of this patent
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Abstract
Described herein are flexible implantable occluding devices that can, for example, navigate the tortuous vessels of the neurovasculature. The occluding devices can also conform to the shape of the tortuous vessels of the vasculature. In some embodiments, the occluding devices can direct blood flow within a vessel away from an aneurysm or limit blood flow to the aneurysm. Some embodiments describe methods and apparatus for adjusting, along a length of the device, the porosity of the occluding device. In some embodiments, the occluding devices allows adequate blood flow to be provided to adjacent structures such that those structures, whether they are branch vessels or oxygen-demanding tissues, are not deprived of the necessary blood flow.
Claims18
A braided stent, for implanting in a patient's vessel, comprising:
- a plurality of braided strands, having an average strand thickness, the plurality of braided strands forming pores in open areas between strands;
- wherein the stent is expandable from a compressed configuration to an expanded configuration;
- wherein the pores have an average pore length;
- wherein the stent has a porosity equal to a ratio of an open surface area of the stent to a total surface area of the stent;
- wherein, when the stent is in the expanded configuration, the porosity of the stent multiplied by the average pore length is equal to or less than about 0.3 mm.
A braided stent, for implanting in a patient's vessel, comprising:
- a plurality of braided strands, having an average strand thickness, the plurality of braided strands forming pores in open areas between strands;
- wherein the stent is expandable from a compressed configuration to an expanded configuration;
- wherein the pores have an average pore length;
- wherein the stent has a porosity equal to a ratio of an open surface area of the stent to a total surface area of the stent;
- wherein, when the stent is in the expanded configuration, the porosity of the stent multiplied by the average strand thickness is equal to or less than about 0.002 inches.
A braided stent, for implanting in a patient's vessel, comprising:
- a plurality of braided strands, having an average strand thickness, the plurality of braided strands forming pores in open areas between strands;
- wherein the stent is expandable from a compressed configuration to an expanded configuration;
- wherein the pores have an average pore length;
- wherein the stent has a porosity equal to a ratio of an open surface area of the stent to a total surface area of the stent;
- wherein, when the stent is in the expanded configuration, the average pore length multiplied by the average strand thickness is equal to or less than about 9.4×10−5 in2.
Dependencies are inferred from the claim text.