# US 12,178,438 B2 · Deploying embolic coils > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,178,438 B2 - Document ID: US12178438B2 - Status: Granted - Kind: B2 - Application number: 17/895,269 - Filed: 2022-08-25 - Published: 2023-01-26 - Granted: 2024-12-31 - Earliest claimed: 2007-03-05 - Assignees: Boston Scientific Scimed, Inc. - Applicants: Boston Scientific Scimed Inc. - Inventors: Aidan O'Connor; Christopher J. Elliott; Mary McCarthy; Ines Burgos; Marcia S. Buiser - Web page: https://patentgrep.com/patent/US12178438B2 ## CPC - A61B 17/12022: {Occluding by internal devices, e.g. balloons or releasable wires (plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20)} - A61B 17/12113: {within an aneurysm} - A61B 17/12145: {having a pre-set deployed three-dimensional shape (methods of manufacturing A61B2017/00526)} - A61B 17/1215: {comprising additional materials, e.g. thrombogenic, having filaments, having fibers, being coated} - A61B 2017/12054: {Details concerning the detachment of the occluding device from the introduction device} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An embolic coil delivery system includes a catheter and an embolic coil disposed within the catheter, the embolic coil including a coil wire and a fiber bundle. A method of producing an embolic coil delivery system includes: advancing a delivery sheath over a distal end of an embolic coil while applying tension to the embolic coil via a retaining device that is attached to the distal end of the embolic coil. ## Claims ### Claim 1 A system comprising: a catheter having a delivery end; and an embolic coil at least partially disposed within the catheter, the embolic coil including a coil wire having an end fitting configured to releasably couple to an end fitting of a delivery wire, and multiple fiber bundles contacting the catheter, each fiber bundle having a first bundle end attached to the coil wire and a second bundle end opposite the first bundle end; wherein more fiber bundles are attached to a first half of the coil adjacent the end fitting than are attached to a second half of the coil. ### Claim 2 (depends on 1) The system of claim 1, wherein spacing between adjacent fiber bundles increases with increasing distance from the end fitting of the coil wire. ### Claim 3 (depends on 1) The system of claim 1, wherein the fiber bundles are disposed in at least one group and the spacing between adjacent fiber bundles is constant within each group of the at least one group. ### Claim 4 (depends on 1) The system of claim 1, wherein each fiber bundle is attached to the coil wire at an attachment point and a first attachment point is circumferentially spaced apart from a second attachment point. ### Claim 5 (depends on 4) The system of claim 4, wherein the attachment point of each fiber bundle is circumferentially spaced apart from the attachment points of adjacent fiber bundles. ### Claim 6 (depends on 1) The system of claim 1, wherein the fiber bundle comprises polyethylene terephthalate or nylon. ### Claim 7 (depends on 1) The system of claim 1, wherein the coil wire has a diameter from 0.0075 inch to 0.015 inch. ### Claim 8 (depends on 1) The system of claim 1, wherein a majority of the fiber bundles are angled such that a distance from the first bundle end of a specific fiber bundle to the delivery end of the catheter is less than a distance from the second bundle end of the specific fiber bundle to the delivery end of the catheter. ### Claim 9 (depends on 1) The system of claim 1, wherein the coil wire comprises a metal. ### Claim 10 (depends on 1) The system of claim 1, further comprising a lubricant disposed on the fiber bundles. ### Claim 11 (depends on 1) The system of claim 1, wherein an inner surface of the catheter comprises a material selected from the group consisting of polypropylene, polytetrafluoroethylene (PTFE), fluoroethylene polymer (FEP), low-density polyethylene (LDPE), high-density polyethylene (HDPE), nylon, and acrylic. ### Claim 12 A system comprising: a delivery wire with an end fitting; a coil wire having a first end, an opposite second end, and a midpoint located halfway between the first end and the second end; an end fitting at the first end of the coil wire, the end fitting configured to releasably couple the embolic coil to the end fitting of the delivery wire; and multiple fiber bundles attached to the coil wire; wherein more fiber bundles are attached to the coil wire between the first end and the midpoint than are attached to the coil wire between the second end and the midpoint, and wherein the coil is an embolic coil. ### Claim 13 (depends on 12) The system of claim 12, wherein spacing between adjacent fiber bundles increases with increasing distance from the first end of the coil. ### Claim 14 (depends on 12) The system of claim 12, wherein the fiber bundles are disposed in at least one group and the spacing between adjacent fiber bundles is constant within each group of the at least one group. ### Claim 15 (depends on 12) The system of claim 12, wherein a proximal end of the coil wire is configured to provide an opposable surface configured for engagement of a pusher element. ### Claim 16 A system comprising: a catheter having a delivery end; a delivery wire with an end fitting; and an embolic coil disposed within the catheter, the embolic coil having a first half and a second half, the second half disposed between the first half and the delivery end of the catheter, the embolic coil including a coil wire and multiple fiber bundles contacting the catheter, the coil wire having an end fitting configured to releasably couple to the end fitting of the delivery wire and each fiber bundle extending from a first bundle end attached to the coil wire to a second bundle end opposite the first bundle end; and wherein more fiber bundles are attached to the first half of the embolic coil than are attached to a second half of the coil. ### Claim 17 (depends on 16) The system of claim 16, wherein spacing between adjacent fiber bundles increases with increasing distance from the end fitting of the coil wire. ### Claim 18 (depends on 16) The system of claim 16, wherein the fiber bundles are disposed in groups and the spacing between adjacent fiber bundles is constant within each group. ### Claim 19 (depends on 16) The system of claim 16, wherein each fiber bundle is attached to the coil wire at an attachment point and a first attachment point is circumferentially spaced apart from a second attachment point. ### Claim 20 (depends on 19) The system of claim 19, wherein the attachment point of each fiber bundle is circumferentially spaced apart from the attachment points of adjacent fiber bundles.