# US 12,758,228 B2 · Implantable embolization device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,758,228 B2 - Document ID: US12758228B2 - Status: Granted - Kind: B2 - Application number: 17/812,069 - Filed: 2022-07-12 - Published: 2024-01-18 - Granted: 2026-10-13 - Earliest claimed: 2022-07-12 - Assignees: Medtronic, Inc. - Applicants: Medtronic, Inc. - Inventors: Amanda K. Eldridge; Jeffrey H. Vogel; Victoria Schuman - Web page: https://patentgrep.com/patent/US12758228B2 ## CPC - A61B 17/12145: {having a pre-set deployed three-dimensional shape (methods of manufacturing A61B2017/00526)} - A61B 17/12109: {in a blood vessel} - A61B 17/12113: {within an aneurysm} - A61B 17/1214: {Coils or wires} - A61B 17/1215: {comprising additional materials, e.g. thrombogenic, having filaments, having fibers, being coated} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract Devices, systems, and methods for occluding body lumens are disclosed herein. According to some embodiments, the present technology includes an embolization device configured to be positioned within a body lumen of a patient. The embolization device can comprise an elongated primary structure formed of a coiled wire, where the primary structure forms a secondary structure when unconstrained in which the primary structure forms an anchor portion and a trailing portion. The anchor portion can be configured to anchor the embolization device at the treatment site, and the trailing portion can be configured to fill space in the body lumen to reduce or block flow into or through the body lumen. The primary structure can have a stiffening feature along at least a portion of the anchor portion. ## Claims ### Claim 1 An embolization device configured to be positioned within a body lumen of a patient, the embolization device comprising: an elongated primary structure formed of a coiled wire, wherein the primary structure forms a secondary structure when unconstrained in which the primary structure forms an anchor portion and a trailing portion, and wherein: the anchor portion comprises at least one loop configured to be in contact with and press radially outwardly against an inner surface of the body lumen at a treatment site such that the anchor portion is configured to anchor the embolization device at the treatment site, and the trailing portion is configured to fill space in the body lumen to reduce or block flow into and/or through the body lumen, wherein the trailing portion is more flexible than the anchor portion, wherein the primary structure has a first length corresponding to the trailing portion and a second length corresponding to the anchor portion, and wherein a sidewall of the primary structure comprises a first number of coil layers along the first length and a second number of coil lavers along the entire second length, the second number greater than the first number, and wherein the wire comprises a first wire length comprising a first cross-sectional dimension and a second wire length comprising a second cross-sectional dimension greater than the first cross-sectional dimension, each of the first and second cross-sectional dimensions measured perpendicular to a longitudinal axis of the wire, and wherein the first length of the wire extends along at least a portion of the first length of the primary structure and the second length of the wire extends along at least a portion of the second length of the primary structure. ### Claim 2 (depends on 1) The embolization device of claim 1, wherein the second length of the wire extends along the entire portion of the second length of the primary structure. ### Claim 3 (depends on 1) The embolization device of claim 1, wherein the anchor portion comprises a first loop and a second loop contiguous with the first loop, and wherein the second length of the wire extends along one or both of the first loop and the second loop. ### Claim 4 (depends on 1) The embolization device of claim 1, wherein the embolization device is configured to be positioned within a blood vessel. ### Claim 5 (depends on 1) The embolization device of claim 1, wherein the primary structure defines a lumen extending therethrough. ### Claim 6 (depends on 1) The embolization device of claim 1, wherein the embolization device is configured to be positioned within an aneurysm. ### Claim 7 (depends on 1) The embolization device of claim 1, wherein the primary structure defines a lumen extending therethrough, and wherein the primary structure comprises a filler material disposed within the lumen along at least a portion of the second length. ### Claim 8 (depends on 1) The embolization device of claim 1, wherein the trailing portion has a first portion configured to deploy to a maximum cross-sectional dimension and a second portion configured to deploy to a maximum cross-sectional dimension different than the maximum cross-sectional dimension of the first portion. ### Claim 9 (depends on 8) The embolization device of claim 8, wherein the first portion of the trailing portion is continuous with the anchor portion. ### Claim 10 (depends on 9) The embolization device of claim 9, wherein the maximum cross-sectional dimension of the first portion is greater than the maximum cross-sectional dimension of the second portion. ### Claim 11 (depends on 1) The embolization device of claim 1, wherein the trailing portion forms at least one loop when the embolization device is implanted at the treatment site. ### Claim 12 (depends on 1) The embolization device of claim 1, wherein the anchor portion is configured to define a conical spiral in a deployed state. ### Claim 13 (depends on 1) The embolization device of claim 1, wherein the anchor portion is configured to exert a larger radial force against the vessel wall compared to the trailing portion when embolization device is implanted at the treatment site. ### Claim 14 An embolization device configured to be positioned within a body lumen of a patient, the embolization device comprising: an elongated primary structure formed of a coiled wire, wherein the primary structure forms a secondary structure when unconstrained in which the primary structure forms an anchor portion and a trailing portion, and wherein: the anchor portion comprises at least one loop configured to be in contact with and press radially outwardly against an inner surface of the body lumen at a treatment site such that the anchor portion is configured to anchor the embolization device at the treatment site, and the trailing portion is configured to fill space in the body lumen to reduce or block flow into and/or through the body lumen, wherein the trailing portion is more flexible than the anchor portion, wherein the primary structure has a first length corresponding to the trailing portion and a second length corresponding to the anchor portion, and wherein the wire forms a single coil layer along the first length and doubles back on itself to form two coil layers along the second length, and wherein the wire comprises a first wire length comprising a first cross-sectional dimension and a second wire length comprising a second cross-sectional dimension greater than the first cross-sectional dimension, each of the first and second cross-sectional dimensions measured perpendicular to a longitudinal axis of the wire, and wherein the first length of the wire extends along at least a portion of the first length of the primary structure and the second length of the wire extends along at least a portion of the second length of the primary structure. ### Claim 15 (depends on 14) The embolization device of claim 14, wherein the second length of the wire extends along the entire portion of the second length of the primary structure. ### Claim 16 (depends on 14) The embolization device of claim 14, wherein the anchor portion comprises a first loop and a second loop contiguous with the first loop, and wherein the second length of the wire extends along one or both of the first loop and the second loop. ### Claim 17 (depends on 14) The embolization device of claim 14, wherein the embolization device is configured to be positioned within a blood vessel. ### Claim 18 (depends on 14) The embolization device of claim 14, wherein the primary structure defines a lumen extending therethrough. ### Claim 19 (depends on 14) The embolization device of claim 14, wherein the embolization device is configured to be positioned within an aneurysm. ### Claim 20 (depends on 14) The embolization device of claim 14, wherein the trailing portion has a first portion configured to deploy to a maximum cross-sectional dimension and a second portion configured to deploy to a maximum cross-sectional dimension different than the maximum cross-sectional dimension of the first portion.